Independent Electrical Contractors (IEC) Year 2 Part 2 Practice Test

These questions are part of the practice quiz. Start practicing

• What aspect does Article 220 specifically address regarding branch circuits?
• When calculating voltage drop, what factor is not considered?
• What is the smallest size of conductor permitted for a feeder protected by a 175-Amp breaker in a residential service panel?
• Conductors in raceways must be what between outlet devices?
• What is the minimum number of convenience receptacles required in an atrium according to the NEC®?
• What is the primary focus of Article 700 of the NEC?
• When NM cable is run on a surface facing the attic, what is required to protect it from physical damage?
• What is the purpose of the required depth for pull boxes in electrical installations?
• Which of the following is not allowed to be supplied from a dwelling unit panelboard?
• What is the requirement for equipment grounding conductors in feeder installations?
• The maximum rating of the primary overcurrent protection device in a 300 KVA, 480-240-volt transformer system delivering 100 amps to 3Ø loads is:
• What is the minimum height that insulated conductors must be above ground when installed to a residential garage that does not pass over a sidewalk or driveway?
• What is required to protect employees from falling into or through openings?
• When fixed glass panels do not permit wall-mounted receptacles, what is typically used to meet receptacle spacing requirements?
• Is it safe to work inside an energized transformer?
• In a 30-foot conduit run containing two conductors, what is the maximum percentage of cross-sectional area that can be occupied by the conductors?
• In a cablebus system, what is the primary concern when using smaller AWG conductors?
• Which chapters in the Code apply generally to electrical installations?
• Proper equipment grounding eliminates voltage that might cause an electric shock by ___.
• Does the NEC® permit receptacle 11 in the kitchen to be connected to one of the 20-amp small-appliance branch circuits?
• Equipment intended to interrupt current at fault levels must have an interrupting rating sufficient for current available:
• What is the largest circuit breaker size that can be installed on a 12 AWG copper circuit conductor?
• What type of work should cablebus be installed for?
• According to NEC guidelines, which size of conductors must be stranded when installed in raceways?
• What is the significance of a non-continuous load in terms of conductor protection rating?
• Under what condition is the uninsulated conductor in nonmetallic-sheathed cable not permitted to be used as a current-carrying conductor?
• When buildings exceed 3 stories or 50 feet in height, what is the required clear space width for ladder access?
• Article 230 in the NEC covers what aspect of electrical work?
• A window unit air conditioner operating at 240 volts would require which breaker to be installed?
• At what kilowatt rating is the demand load for household electric ranges computed per NEC® Table 220.55?
• What is the correct statement regarding conductors with temperature ratings higher than specified for terminations?
• What is the nominal gas pressure for IGS cable insulation measured in pounds per square inch gauge?
• Which statements are true regarding the protection of nonmetallic sheathed cable from physical damage?
• For proper functioning, what is necessary for an overcurrent protection device to operate effectively?
• Section 240.21(C)(6) in the NEC® mentions the "25 foot rule". What does this rule require?
• What defines the interrupting rating of a fuse?
• When boring holes for electrical installations through wood members, what is the minimum edge distance required from the nearest edge of the wood?
• Covers of outlet boxes must be provided with approved ___ for holes through which flexible cord pendants may pass.
• What defines a circuit that controls another circuit through a relay or equivalent device?
• What does NEC® Section 110.9 require for electrical equipment?
• A single receptacle installed on a 20-ampere 120-volt circuit shall have an ampere rating of what?
• How many layers should be used when installing single conductors between 1/0 through 4/0 AWG in ladder or ventilated trough cable trays?
• What is the largest conductor permitted in a 3/8" flexible conduit?
• Which type of raceway has the smallest cross-sectional area among 11/4 trade sizes?
• Where conduit is threaded in the field, what taper per foot should be used with a standard conduit cutting die?
• When must drawings for feeder installations be submitted?
• For the minimum calculated dimension for "width" in inches, which value is correct based on the dimensions given for conduits?
• What is the maximum distance a service head can be located below the point of attachment when impractical to position above?
• When splices, angle, or U pulls are made, the distance between each raceway entry inside the box and the opposite wall must be at least how many times the trade size of the largest raceway?
• What is the minimum conductor size for surge protective devices (SPDs) in AWG copper?
• What should be followed for safe practices when working near energized panels?
• What marking is required on electrical panels for safety?
• What is the aim of the safety measures discussed in NEC articles?
• In electrical installations, what should be the primary consideration for conductor sizing?
• In a 40-foot run of conduit, what is the maximum allowed percentage of cross-sectional area that can be occupied by conductors?
• What is the typical insulation temperature rating for SE cable?
• What does it mean for a location to be described as "guarded"?
• To maintain accessibility of connections inside an outlet box, the NEC permits a surface extension to be made by installing ___.
• In commercial wiring, what is the significance of using a 4" square box?
• What is the smallest allowable size for overhead service conductors made of copper?
• When assessing angle pull requirements near the junction box, the cable size to be noted should be at which AWG value or larger?
• What is the range for potential OSHA fines?
• What is the recommended maximum voltage drop for feeders according to the Code?
• Is all power required to be turned off before working on or inside a transformer?
• Chapter 1 in the NEC is related to which general topic?
• A 500,000-circular mil cable is composed of how many strands?
• What is the maximum number of 2/0 AWG THHN/THWN conductors that can be installed in a 14" section of trade size 3 1/2 Schedule 40 PVC?
• What must be done to assure electrically safe work conditions when working on switchboards or panelboards?
• Which chapter in the NEC addresses Wiring Methods and Materials?
• For a 3-phase, 4-wire system, how should the branch circuits be identified?
• Which NEC® section states that outlet and device boxes must be deep enough to prevent conductor damage during installation?
• What does NEC® require regarding the installation of outlets in new residential kitchens?
• What is the largest conductor size allowed in cellular metal floor raceways without special permission?
• When is GFCI protection generally required in residential bathrooms?
• What is the recommended maximum voltage drop for feeders as stated in applicable codes?
• What often results from poor housekeeping practices?
• What must be done when nonmetallic sheathed cable passes through a floor?
• How far must at least one receptacle be located from the outside edge of each basin in a bathroom?
• Which scenario requires the installation of a GFPE device?
• In a balanced 3-wire circuit from a single-phase 230/115-volt system, the neutral conductor should carry:
• Which of the following can be used to connect grounding conductors and bonding jumpers?
• For a receptacle to be considered 'available' in a basement, how far can it be from a point measured horizontally along the floor?
• Conductor sizes are typically given in AWG or what other unit?
• Which type of boxes should not be used where conduits or connectors requiring locknuts or bushings are to be attached?
• What topic does Article 242 Part III in the NEC address?
• When two ungrounded circuit conductors touch together, this is called a ground fault. Which scenario also describes a ground fault?
• What is the smallest permitted box assembly to contain one 30 amp 240-volt single receptacle and one 15 amp 120-volt single receptacle?
• A 4 AWG equipment grounding conductor can be marked by what color of tape?
• The smallest EGC permitted to be installed in the conduit between the panel and the pull box for a 250-amp breaker is ___ AWG.
• Which statement about supplementary overcurrent protection is correct?
• What must be considered when calculating conduit fill for multiple conductors?
• Which of the following terms best describes the areas classified under Chapter 5 of the NEC?
• Which article in the NEC pertains to Solar Photovoltaic Systems?
• What is a requirement for ceiling fan installation according to the NEC?
• In a run of conduit that is not permitted to exceed 40% fill, the number of conductors can be calculated based on what measure?
• Which article in the NEC addresses Branch Circuits?
• According to electrical codes, what type of load calculation is important for determining service size in multifamily dwellings?
• The maximum number of 2/0 AWG THHN/THWN conductors that can be installed in an 8" x 8" wireway is?
• Cabinets and cutout boxes shall be deep enough to close doors when which circuits are in any position?
• What is the minimum size copper grounding electrode conductor permitted for a 150-ampere dwelling service with 2/0 AWG aluminum conductors?
• What type of bonding is specifically required for metal gas lines?
• What could be a consequence of non-compliance with the Code?
• According to NEC® regulations, the cross-sectional area of an 8 AWG bare stranded copper conductor is measured in what unit?
• Which of the following represents a good practice for installing electrical raceways?
• What is the focus of Article 100 in the NEC?
• According to the NEC®, how many receptacles are required in a 63-foot long office building hallway?
• In terms of planning for energy consumption, how is branch circuit loading typically assessed?
• Where can arc-fault requirements for dwelling units be found?
• What is found in Chapter 9 of the NEC?
• Chapter 1 of the NEC covers what topic?
• Which standard is essential to refer to regarding electrical safety while working on transformers?
• According to NEC® regulations, how far can outlet boxes be set back from the finished wall surface?
• According to electrical codes, branch circuits in dwelling units are restricted to supply loads from which of the following?
• What is the acceptable termination for a 120/240-volt, 1Ø, 3-wire branch circuit in a parking attendant's "shack" when the conduit arrives?
• Each surge protective device (SPD) shall be connected to which conductor if installed?
• How should equipment grounding conductors be sized in a conduit with multiple circuits?
• What is the maximum allowable distance between the box and support #1 for MC cable used for a 26 feet connection?
• Handles or levers on circuit breakers must be...
• Why is it important to have a properly installed grounding system?
• Which Informative Annex D example outlines the steps for the Optional Calculation for multifamily dwellings?
• What is the primary responsibility of the authority having jurisdiction?
• What type of connector is typically used with MC cables to make secure connections in boxes?
• What is covered in Article 200 of the NEC?
• What do we call the point on a wiring system that supplies current to utilization equipment?
• How many straps are needed to support a trade size 2 IMC conduit between two enclosures that are 123 feet apart?
• The ampacity of types NM and NMC cable corresponds to what degree C conductors?
• What does Article 90 in the NEC involve?
• Chapter 9 in the NEC is primarily concerned with what?
• What is the significance of using a warning ribbon above buried service conductors?
• In a dwelling, what is the maximum distance a receptacle can be from point 2 adjacent to a sliding glass door?
• When determining the size of a 120/240-volt 1Ø, 3-wire service, how is the lighting load in amps calculated?
• What are the Informational Notes (I-Notes) in the National Electrical Code®?
• What is the minimum number of 15-amp, 120-volt lighting circuits required for a multifamily dwelling of 12,000 sq. ft.?
• What indicates the deletion of one or more complete paragraphs from the previous edition of the NEC®?
• For a properly installed device box with nonmetallic sheathed cable, what should be considered to ensure compliance?
• In what scenario is a separate bonding jumper required when using flexible metal conduit?
• The term 'ampacity' refers to what aspect of an electrical conductor?
• What does "must be in writing" imply about emergency action plans?
• What is the circular mil area of a 12 AWG conductor?
• According to the National Electrical Code (NEC), equipment grounding conductors can be made from which material?
• Which condition is not a cause for derating conductors?
• How many receptacle outlets does the NEC® allow to be connected on a 120-volt residential lighting or small-appliance branch circuit?
• What is the required width of the working space in front of a load center that is 24 inches tall and 18 inches wide?
• Type 3 surge protective devices must be installed at least how far from the main distribution panel?
• Article 702 of the NEC deals with which systems?
• In which NEC® Article is the term Surge Protective Device (SPD) addressed?
• Which of the following statements is true regarding conductor sizes?
• Which location is permitted for a breaker panel?
• Prior to soldering, soldered splices must be:
• Which of the following best describes PPE in relation to electrical work?
• Electrical junction boxes installed in walls and ceilings must always be ___.
• When do overhead lines’ arrangements become critical in facilitating ladder access for fire fighting?
• What is the diameter of each strand in a 500,000-circular mil cable composed of 37 strands?
• What is the maximum length of festoon lighting conductors before they must be supported by messenger wire?
• Before working on a transformer, which standard must be followed according to safe work practices?
• A receptacle installed inside a cabinet to serve a cord-connected microwave oven must be connected to which circuit?
• How many kitchens can two 20-ampere small appliance circuits supply in a dwelling?
• What is the maximum percentage of cross-sectional area a strut-type channel raceway can be filled with external joiners?
• What information is included with panelboards and switchboards regarding the correct handling of the equipment?
• What should be taken into consideration when selecting wire sizes for branch circuits?
• What does Article 430 of the NEC cover?
• Generally, the grounding electrode conductor must be installed how?
• What is the maximum conductor fill percentage allowed in underfloor raceways?
• Article 409 of the NEC pertains to which of the following?
• What is the minimum thickness required for a 6" x 4" x 3 1/2" cast aluminum box?
• A feeder supplying a 5 kW wall-mounted oven and a 7 kW counter-mounted cooktop must have a minimum demand factor of what?
• Why is the amperage rating of receptacles crucial in branch circuits?
• What is the DC resistance at 167 degrees F for a 2/0 AWG bare aluminum conductor?
• Which of the following is a requirement for the installation of conductors under the NEC?
• When calculating the lighting load of a restaurant, what is the unit load per square foot that shall be used?
• What is the maximum size grounding electrode conductor required from the service equipment to the rebar in the bottom of the grade beam?
• How thick is the insulation of XHHW 500 kcmil conductors?
• Using the optional calculation method, four or more separately-controlled electric space-heating units are calculated at what percentage of their nameplate ratings?
• What type of systems is Article 700 of the NEC concerned with?
• Where are electrical receptacle outlets not permitted to be located?
• What is the allowable maximum total voltage drop percentage when sizing feeder conductors for reasonable efficiency?
• What is the function of a junction box?
• When using the optional calculation method for dwelling units, which type of loads does it consider alongside heating or A/C loads?
• What is the general volume allowance for a conductor when sizing wiring boxes?
• Which article outlines the requirements for installation of switchboards?
• What type of circuit breaker is standard for most branch circuit applications?
• What is the minimum bend radius for 1 in. diameter corrugated sheath MC cable?
• For loads likely to be ON for 8 hours, how should the computed load for sizing branch-circuit conductors and OCPDs be calculated?
• In which situation should Type MC cable not be utilized?
• Which of the following best describes electrical installations covered by the Code?
• Which of the following must be true about the grounding electrode conductor?
• What must be done if you find a transformer door or cover is damaged?
• What is the cross-sectional area of an 8 AWG bare solid copper conductor according to the NEC®?
• What is the minimum size of secondary conductors for a transformer supplying power?
• If the allowable current rating of a busway is 1400 amps, what is the maximum allowable rating of the overcurrent protection device?
• What is the insulation temperature rating of Type THWN wire in wet locations?
• What is the correct procedure to take before handling any maintenance on a transformer?
• What is the minimum working clearance required at a 277/480-volt panel?
• Transformers must not be connected to circuits exceeding what percentage above the nameplate rating?
• A receptacle installed outside on the exterior wall of a doctor's office building is required to be what?
• How many cmils is the cross-sectional area of a 4 AWG bare copper conductor?
• What is the minimum requirement for service conductors in terms of load calculation?
• For a one-family dwelling, the minimum rating for the service disconnecting means should be at least what amperage?
• The ampacity of a conductor must not be less than what rating?
• Which chapters in the NEC® apply generally unless modified by later chapters?
• Which factor is most significant when figuring the electrical service demand for an office building?
• What must a qualified person understand about safety equipment?
• What does Article 110 in the NEC address?
• What is the calculated minimum width (left-to-right) of the referenced pull box in inches?
• For a 277/480-V, 3-ph, 4-W wiring system, what color is permitted for the insulation of any of the ungrounded conductors?
• In understanding current-carrying conductors, what ensures optimal performance and safety?
• Can a white conductor in a 12/2 with ground MC cable be marked with purple tape to be used for a traveler from a 3-way switch?
• What is the focus of Article 230 in the NEC?
• What connects the equipment grounding conductors to the grounded (neutral) conductors?
• Service conductors must have a clearance of not less than how many feet from windows, doors, or similar openings?
• In a duplex receptacle where Circuit 22 supplies the upper half and Circuit 24 supplies the lower half, what type of breakers are permitted?
• Which NEC article pertains to branch circuits?
• What is the minimum headroom required in front of a panelboard?
• For household cooking equipment on a 50-ampere branch circuit, what is the minimum ampacity requirement for tap conductors?
• Which article addresses Transformers and Transformer Vaults in the NEC?
• What does it mean when provisions of the Code are legally enforced?
• What is the purpose of fuses installed in a safety switch?
• How does the NEC® define an installation that is located inside a building?
• What is the minimum calculated dimension for "height" in inches, as noted for a specific pull box?
• According to the NEC®, is splicing of short branch circuit wires allowed to reach breaker terminals?
• What does the term 'overcurrent' refer to in electrical circuits?
• Between which two types of conductors does 2 AWG copper exhibit a lower resistance?
• For a branch circuit, what is the implication of supplying both fixed and portable equipment?
• What is the primary purpose of the main bonding jumper?
• How many wires are required for the minimum rating of a service disconnecting means in a one-family dwelling?
• For a load drawing 800 amps, what is the minimum gauge required for conductors in each conduit when using three parallel conduits?
• Which statements about the equipment grounding conductor are true?
• In a residential installation, what is the minimum height requirement for outlets installed in walls?
• What does the NEC® help to protect against?
• Under what condition can floor-mounted receptacles be used instead of wall-mounted ones?
• What is the minimum feeder load in VA for a 40-foot long show window?
• What is the minimum size in volt-amperes that a dryer must be calculated at when sizing a service?
• For services over 100 amperes, which grounding electrode conductor material is most commonly used?
• If a metal switch enclosure is installed in a damp location, how far must it be spaced from the mounting surface?
• How should the neutral conductor for a service be sized?
• Which article gives definitions used throughout the NEC?
• According to the NEC, can dissimilar metal conductors be intermixed in terminal connectors?
• No conductor larger than which AWG can be installed in a cellular concrete floor raceway without special permission?
• What is the maximum percentage of a branch circuit rating that can be used for permanently installed equipment when also supplying cord-and-plug connected equipment?
• According to the NEC®, feeder and service-entrance conductors should have the neutral load determined by which section?
• What is a common application for schedule 80 PVC in electrical installations?
• What is the requirement for receptacles in a finished basement according to the NEC®?
• Which statement is true when comparing Schedule 40 to Schedule 80 PVC?
• What is the maximum length of a flexible cord connected directly to a busway plug-in device?
• What is the main purpose of conductors with temperature ratings according to Section 110.14(C)?
• Using Informative Annex D Example D6, what is the calculated kW demand for 25 ranges, each rated at 16 kW?
• What is the purpose of using insulated tools when working near energized conductors?
• What is the minimum number of 120-volt receptacles required in a dwelling laundry room?
• What NEC® code reference allows the use of steel threaded rigid couplings with aluminum rigid metal conduit?
• Fuses shall be plainly marked with which of the following?
• What is considered rainproof according to electrical standards?
• What is the maximum gap allowed at the edge of any fitting or box that is repaired for non-combustible surfaces?
• What is Type FCC cable designed for?
• In which section is it stated when a conductor with white insulation may be used as an ungrounded circuit conductor?
• Under what condition is the equipment grounding conductor allowed to be run separately from the circuit conductors?
• For a single-family dwelling with 3500 square feet, how many 15-ampere lighting branch circuits are minimally required?
• How often must mineral-insulated, metal-sheathed cable be supported and secured?
• The allowable fill percentage for conductors in a conduit run should not exceed which value?
• What aspect is crucial when selecting the conductor sizes for feeders?
• What is the maximum number of 2/0 AWG THHN/THWN conductors that can be installed in an 8" x 8" wireway?
• A grounded circuit conductor shall be permitted to ground noncurrent-carrying metal parts of equipment on the ___ or within the enclosure of the AC service-disconnecting means.
• Under which condition can multiple conductors be connected to a grounding electrode with a single clamp or fitting?
• What is the smallest size copper wire allowed as a grounding electrode conductor (GEC) for building steel from a 200 A main breaker?
• In areas with potential electrical hazards, what should employees use to protect specific parts of the body?
• What is the primary focus of the NEC?
• Which of the following is NOT covered by the scope of Article 250?
• In the context of NEC® Chapter 3, where can requirements for splices and taps be found?
• What must be done to a 200 amp bus installed at the end of an 800 amp busway run?
• Which article in the NEC pertains to Temporary Installations?
• Which statement regarding rigid conduit is correct?
• What is the minimum ampere rating required for a duplex receptacle installed on a 20-ampere branch circuit?
• What minimum height does a receptacle need to be installed at when serving a basin in a bathroom?
• In the provided plan of a house, is a receptacle required to be installed in the 18" wall space in the NW corner?
• What does Article 450 focus on regarding electrical work?
• Article 408 of the NEC deals with which components?
• The measurement of DC resistance in conductors is essential for evaluating?
• What is the minimum vertical clearance above ground for overhead conductors?
• Service conductors supplying one building shall not ___ of another building.
• Ground-fault protection is required for a feeder disconnect if what condition exists?
• What is the requirement for receptacle placement in relation to a sliding glass door in a dwelling?
• What is the designation of the conductor shown at Point II?
• What is the minimum rating in amperes for a 480-volt, three-phase, wye-connected feeder disconnect that needs ground-fault protection?
• What is a disconnecting means in an electrical system?
• How is a branch circuit defined?
• What size must the conductors between the transformer and the main panelboard be?
• What can cause accidents if left carelessly on the floor or stairs?
• What do transient voltage surge suppressors minimize?
• How many outlets can be installed on a 20-ampere circuit (120 volt) if each outlet is rated at 180 VA?
• What type of boxes are used where conduits require the use of locknuts or bushings?
• What material can the grounding electrode conductor be made of?
• Which table in the NEC® provides the minimum wire sizes based on branch circuit rating?
• For a 120/208-volt panelboard, what is the minimum width of the working space directly in front of the panel?
• What is the smallest gauge conductors permitted by the NEC® for a 200-A residential service?
• In FY 2018, what percentage of OSHA inspections were conducted on construction sites?
• How deep should underground service conductors that are not in concrete be buried to require a warning ribbon above it?
• The conductors at Point I are referred to as what in electrical terminology?
• What is the minimum size schedule 80 PVC conduit required for a run containing three 350 kcmil, one 3/0, and one #2 THHN/THWN conductors?
• What is the maximum number of 12 AWG conductors permitted in a 4-11/16" x 1-1/2" square box?
• What should be used to warn employees about potential electrical hazards?
• What locations can dual-rated THHN/THWN conductors be installed in?
• When installing panelboards or switchboards, what must be adhered to?
• SE cable used to supply appliances must not exceed which specified temperature for the type of insulation?
• What is the significance of the main bonding jumper in an electrical system?
• Type MC cable should not be used in which type of conditions?
• Which chapter of the NEC is dedicated to Special Equipment?
• How many circular mils are equivalent to a 500 kcmil cable?
• What is the circular mil area of a 3/0 AWG conductor?
• Which of the following indicates that circuit breakers must be safely positioned?
• When installed between boxes, what is the maximum length allowed for conduit nipples?
• What is the maximum interval for securely supporting vertical runs of metal wireways?
• For an underground circuit to an isolated ground receptacle, what additional component should be pulled in along with the circuit conductors?
• What is the minimum number of receptacles that can be installed along specified countertops in a kitchen?
• What is the maximum number of service disconnects recommended for a single service?
• In a finished basement, what is the maximum distance from the wall floor line to the closest receptacle outlet?
• What is the main subject of Article 700 in the NEC?
• How much must the nonmetallic sheath extend inside the box and beyond any cable clamp?
• Does the NEC® allow circuits from the panels to enter the same pull box?
• What condition must be met for the feeder conductors to carry the total load supplied by service-entrance conductors?
• When several AC, MC, or NMC cables are installed close together, how does it affect the current-carrying capacity of the conductors?
• Which conductor type is known for its versatility across various installation environments?
• What is the minimum size of conductors that can be used in cablebus systems?
• When is a 120-volt cord-and-plug connected appliance allowed to have a two-wire cord?
• What is the primary concern when working with energized circuits?
• Which conductor insulation is known to be oil resistant?
• What requirement must service-drop conductors meet?
• What defines a qualified person in electrical work?
• In pull boxes or junction boxes with any dimension over which feet must all conductors be cabled or racked in an approved manner?
• What is the main purpose of OSHA?
• Who is permitted to install and service transformers?
• If a transformer supplies power to a 240-volt, 3-phase, non-continuous 32.841 kVA load, what is the maximum rating for the secondary OCPD?
• Which Annex D example should be used to determine the service rating for a one-family home with air conditioning?
• Which of the following installations are covered by the NEC®?
• What is the minimum threshold for a load that necessitates the installation of a feeder?
• What term describes a piece of equipment that is connected to the earth?
• When dealing with parallel conductors, which of the following criteria must they meet?
• What is the minimum calculated dimension for "height" in inches for a pull box when considering various conduit sizes?
• What are the requirements for doors in a room with a 1200-A fused safety switch?
• What is the minimum wire bending space required at the top and bottom of a panelboard with three 3/0 AWG conductors?
• Branch circuits that serve what must be rated at 20 amperes in a house?
• How much expansion would occur in an 80-foot run of Schedule 40 PVC between winter and summer temperatures?
• Which of the following is NOT included in the allowed connections on a 15-amp branch circuit?
• What is the maximum percentage of branch circuit rating that fastened-in-place utilization equipment can comprise when connected to other loads?
• What is the focus of Article 600 in the NEC?
• What is the purpose of the insulation in dual-rated THHN/THWN conductors?
• What is the maximum specified spacing between receptacles along a kitchen countertop in a restaurant?
• Which part of the NEC® states that unused knockouts in electrical boxes must be closed?
• When might accident prevention tags be necessary in the workplace?
• Rigid Metal Conduit (RMC) is generally made of which materials?
• What is the primary focus of Article 450?
• What is the minimum bending radius of Type P cable intended to achieve?
• For an installation consisting of not more than two 2-wire branch circuits, the service disconnecting means shall have a rating of not less than ___ amperes.
• Branch circuits are primarily rated based on which of the following criteria?
• What condition must be met for the definition of Effective Ground-Fault Current Path to be satisfied?
• What is the minimum number of AFCI circuit breakers required to be installed in Panel B?
• Which markings must be placed on all electric equipment for identification?
• Which suffix designates two insulated conductors laid parallel in a cable?
• Examples of raceways would include which of the following?
• What is the recommended maximum total voltage drop for feeders and branch circuits together?
• Which of the following best describes the NEC® requirement for box fill volume?
• What is a lighting outlet?
• Is it permitted to run a branch circuit from the neutral bar in a 120/240-volt panelboard for a 208-volt load?
• According to the code, what is the largest circuit breaker rating that can be used for a circuit with 10 AWG conductors?
• How many dedicated equipment grounding conductors should be installed in a conduit with four dedicated circuits?
• What conductor volume allowance is counted towards the box fill calculation when two internal cable clamps are present in a box?
• What is the focus of Article 215 in the NEC?
• Nominal voltage includes a range of actual circuit voltages that are:
• Type _____ cable can be directly buried in a trench underground if covered with stabilized sand to prevent physical damage.
• What does Article 230 in the NEC cover?
• What is the minimum number of 20-ampere branch circuits for small appliances required in a residence?
• According to NEC® 210.52(A)(1), the "6-foot rule" for spacing receptacles does not apply to which of the following areas?
• What is the minimum volume required for a junction box containing multiple conductors as described?
• Which identification is NOT acceptable for an insulated grounded conductor 6 AWG or smaller?
• Which of the following conditions should lead to not using a ladder?
• For workplace inspections, what must OSHA do before entering?
• What is the maximum temperature rating of a THHN conductor in a dry location?
• What is the minimum diameter for round access openings in a manhole?
• What is the maximum number of current-carrying conductors allowed in a wireway without needing ampacity adjustment?
• What is the maximum fill percentage for conductors in removable cover nonmetallic raceways?
• Why is an electrical service grounded?
• What must the disconnecting means do for a multiwire branch circuit?
• What is the cubic-inch allowance for a 10 AWG conductor?
• Which article addresses Optional Standby Systems in the NEC?
• What does the Code encompass?
• Luminaires weighing more than how many pounds are required to be supported independently of the outlet box?
• What type of assistance does OSHA provide in occupational safety and health?
• How is the measurement of a conductor's area commonly expressed?
• What does Article 220 in the NEC cover?
• What type of events does Article 525 of the NEC address?
• What is a primary consideration for the installation of wiring in cabinets?
• According to the pull box specifications, what is the minimum calculated dimension for "width" in inches for a different pull box scenario?
• What is the rated temperature for conductors within armored cable installed in thermal insulation?
• In the context of conducting installations, what is the primary concern when it comes to the closure of unused openings in electrical boxes?
• In a NM cable installation without a connector, what is the maximum allowed distance between a single-gang nonmetallic outlet box and the first strap?
• What is the grounding electrode conductor commonly referred to as?
• According to NEC® Section 250.118, what can be utilized as an equipment grounding conductor?
• According to NEC® Section 314.3, what type of outlet and device boxes can be installed with nonmetallic sheathed cable?
• Feeders that contain a common neutral conductor are permitted to supply which of the following?
• Article 368 in the NEC is focused on what type of equipment?
• Service entrance cables shall be supported by straps or other approved means within ___ of every service head, gooseneck, or connection to a raceway or enclosure.
• What does Article 408 in the NEC address?
• According to the Code, Article 312 does not apply to equipment operating at voltages exceeding which amount?
• What is required for cabinets and cutout boxes to accommodate conductors installed in them?
• What does the grounding electrode help ensure during an electrical fault?
• Branch circuits are primarily rated based on what criteria?
• Which of the following can be used to connect grounding conductors and bonding jumpers?
• Which conductor is not permitted to be connected in parallel among the options provided?
• Which of the following is not permitted to serve as an equipment grounding conductor?
• Which of the following is NOT a type of equipment mentioned that requires field marking?
• For receptacles supplying countertops in the dining room, what is the maximum distance to the nearest receptacle?
• Conductors supplying more than one receptacle for portable loads must have an ampacity of at least what?
• Where should the service equipment disconnect for a manufacturing building be installed?
• In the NEC, Article 225 is focused on what aspect?
• The grounded conductor between two panels in a wiring system carries current during what situation?
• What is the smallest size THHN/THWN copper conductor permitted for a feeder protected by a 150 A breaker?
• What percent demand factor is applied to the unbalanced neutral feeder load in excess of 200 amps?
• Article 695 in the NEC primarily deals with what subject?
• What types of faults must overcurrent protective devices be able to clear without extensive damage?
• When servicing a cord-connected microwave oven, what type of receptacle is permitted?
• In a perfectly functioning circuit, the outlet delivers current when what condition is met?
• What type of support does OSHA provide to small businesses for maintaining a safe work environment?
• According to NEC® standards, how high must the ceiling be if the bottom of a 277/480-volt panel is 38" AFF?
• What does NEC® Article 110.16 require for switchboards, panelboards, and industrial motor control panels in non-dwelling occupancies?
• What is an acceptable means of identification for conductors in a premises wiring system supplied from multiple nominal voltage systems?
• In a 23-foot long hallway, what is the minimum number of wall receptacles required by the NEC®?
• What happens if the service-entrance conductors exceed the designated size requirements?
• When can a continuous white or natural gray covering on a conductor be used?
• What is the smallest size standard fuse?
• What is the primary purpose of the "6-foot rule" in residential electrical installations?
• According to the NEC®, the ampacity of a feeder must be equal to or greater than what?
• What is the minimum size of copper wire permitted as a main bonding jumper in a 200-A main breaker panelboard?
• The conductor at Point III connects the metal panel enclosure to which conductors?
• What is the primary function of an overcurrent protection device?
• What is the minimum size conductor allowed in commercial buildings for branch circuits up to 2000 volts?
• What is the minimum demand for an electric clothes dryer in a residential load calculation?
• For a conductor with a computed ampacity of 75 amps, what is the maximum standard ampere rating of the overcurrent protection device allowed?
• The minimum internal depth required for outlet boxes that do not enclose devices is how many inches?
• What is the minimum size for an underground service-lateral conductor?
• The NEC applies to installations of electrical conductors, equipment, and raceways in which of the following?
• A fixture stud in a box is equivalent to how many conductors?
• What is the minimum depth required for a pull box that accommodates four 4/0 AWG conductors and one 4 AWG grounding conductor?
• For proper installation, how should cabinets be positioned in terms of the finished wall surface?
• What is the ampacity of each 6 AWG THW copper conductor when there are four in a nipple?
• Which of the following statements accurately describes current-carrying conductors?
• What is the primary purpose of grounding systems?
• A single receptacle for a dishwasher located 2 feet from a kitchen sink requires what type of protection?
• Which type of circuits in a dwelling unit are allowed to supply loads exclusively from that unit?
• For a 12' run of 21/2 inch FMC, what is the maximum area that can be occupied by the circuit conductors?
• For which applications is Type TBS insulation primarily recommended?
• What is the significance of the ampacity rating for conductors?
• What additional requirement is necessary for conductors of dissimilar metals when mixed?
• Why is it important to avoid contact of dissimilar metals in electrical installations?
• What is the primary purpose of bushings on outlet boxes?
• For a 12' length of lighting track installed in a master bedroom, how many VA must be allocated according to NEC® 220.43(B)?
• Electrical metallic tubing must be constructed from which of the following materials?
• What does ampacity refer to in regard to insulated conductors?
• What is the temperature rating of Type THW insulation for wiring through fixtures?
• Which article of the NEC would you consult for information on grounded conductors?
• What is the minimum THHN/THWN wire size required to serve a load of 47 amps, operating for about 5 hours at a time?
• What must be bonded to an electrical grounding system in terms of metal gas lines?
• What is the maximum voltage between circuit conductors using plug fuses?
• In a kitchen with a countertop width of 13", is receptacle 9 required by the NEC®?
• What is a key requirement when installing a 240/120-V three-wire feeder underground to a detached garage?
• When a calculation results in a fraction of an ampere of what value or more, can the NEC® permit rounding up to the next ampere?
• How can potential differences between metal enclosures lead to electric shock?
• What is the maximum distance from the floor that nonmetallic surface extensions may be installed?
• At what ambient temperature does the ampacity of conductors begin to be derated?
• A duplex receptacle with two circuits on the same yoke is permitted to have what as a means of disconnect?
• What minimum wireway size is needed to contain one hundred #8 THHN/THWN conductors?
• What is the conduit fill value of #1 RHH conductors in square inches?
• Which of the following statements is true regarding fault current pathways?
• Which color is generally accepted for a grounded conductor?
• Which of the following factors does not affect the allowable number of conductors in a box according to NEC?
• The dimensions of a bare stranded copper conductor can impact its?
• Which of the following components does a busway typically refer to?
• By what percentage has the rate of occupational injury and illnesses been reduced since OSHA's inception?
• For 350 kcmil conductors with non-removable lugs in Figure 210.6, what is the minimum required wire bending space at II?
• Where can the cross-sectional area in circular mils be found when performing voltage-drop calculations?
• What type of economic burden do personal injuries and illnesses in the workplace cause according to Congress?
• What is the main purpose of an equipment grounding conductor?
• What is the maximum weight a ceiling fan support box can safely hold if it is marked for such use?
• In accordance with code, how should conductors be connected to prevent issues in a terminal or splicing connector?
• Which Article of the NEC® deals with the volt-ampere rating of multioutlet assemblies?
• What is the minimum load computed for a required sign branch circuit?
• According to the NEC®, how many receptacles are required in an IEC classroom that is 36 feet by 24 feet with a 3-foot wide door?
• The area of a conductor can be expressed in which of the following?
• Pushing the handle UP or pulling the handle DOWN on a circuit breaker operates it. Pulling the handle DOWN turns the breaker:
• What type of insulation rating is associated with Type THHN conductors?
• How do articles like Article 210 and Article 220 in the NEC contribute to electrical safety?
• Lengths of flexible metal conduit longer than ___ feet are not acceptable as an equipment grounding conductor.
• Which materials are permitted for use with IMC fittings and enclosures?
• What is the overall diameter of a 1/0 bare stranded copper conductor?
• What is the maximum allowable space between the panel enclosure and the panel cover as indicated in Figure 210.12?
• At what minimum voltage must live parts of electrical equipment be guarded?
• Which article would you refer to for guidelines on feeders?
• Which article provides guidance on branch-circuit calculations for determining the size of a service or feeder?
• On which type of system is a surge-protected device not permitted unless specifically listed for them?
• What is the fewest number of receptacles required by the NEC® for a 20-foot stainless steel countertop in a restaurant with two sinks?
• When calculating service load, which of two noncoincident loads needs to be included?
• What is the common minimum height for various pull box designs based on conventional standards?
• What phrase indicates that small-appliance and laundry loads may be included with the general lighting load according to NEC® Table 220.42?
• What is the main topic of Article 680?
• Are smoke detectors in residential bedroom areas required to have AFCI protection?
• What is the typical requirement for airspace in a wet location installation?
• Branch circuits that serve a bathroom, kitchen, or clothes washing machine in a school are required to be rated at what amperage?
• How many outdoor receptacles does the NEC® require to be installed in a dwelling?
• Which article covers the safety standards for carnivals and fairs?
• In the NEC®, the neutral conductor of a 120-volt circuit is referred to as what type of conductor?
• What is the minimum span distance for festoon lighting that requires support by messenger wire?
• How far apart should individual ground rods be installed when multiple rods are used?
• What aspect of electrical institutions does Article 517 pertain to?
• A 16 AWG fixture wire up to how many feet is protected by a 20-amp overcurrent device?
• For angle pulls of conductors 4 AWG and larger, what is the minimum distance required between raceway entries?
• In an unfinished basement with laundry facilities, what is the minimum number of receptacles required?
• Who enforces the Code rules and provisions?
• Circuit breakers shall be marked with a voltage rating indicative of their capability to interrupt fault currents between:
• At what ambient temperature in degrees Fahrenheit is PVC cable restricted from use unless otherwise specified?
• If a receptacle is installed in countertop space A in a restaurant kitchen, does it require GFCI protection?
• For feeding electrical loads, what is the recommended maximum voltage drop for branch circuits according to electrical codes?
• What does an equipment grounding conductor help to eliminate?
• What should you do if service conductors are subject to physical damage?
• In the NEC, what does the term 'unit load' refer to in respect to lighting load calculations?
• Circuit breakers must generally be...
• What is the required ampere interrupting rating (AIR) for service equipment at the service location?
• In Figure 210.6, what is the minimum wire bending space required at I for conductors connected to 4/0 AWG lugs that are not removable?
• What is covered under Article 242 in the NEC?
• Which type of cable is permitted to be buried in a trench underground covered with stabilized sand?
• Overhead branch circuit and feeder conductors shall not be installed beneath what type of openings?
• When should a circuit breaker be replaced?
• When is ground-fault protection not required for a feeder disconnect?
• Which chapter of the NEC focuses on Wiring Methods and Materials?
• Which statement is true regarding the requirements for an emergency action plan?
• For working or walking surfaces, the open sides of upper levels should be?
• What is the minimum trade size of RMC permitted for installation between two panelboards that are 5 feet apart?
• Which of the following is NOT permissible as an equipment grounding conductor?
• In Figure 210.6, what is the minimum wire bending space required at II for conductors connected to 4/0 AWG terminal lugs?
• An emergency action plan should include what type of information regarding individuals?
• Service entrance cables, where subject to physical damage, shall be protected by which of the following?
• Which of the following is an acceptable material for a grounding electrode conductor?
• For a 277/480-volt, 3Ø, 4-wire service, what is the minimum clearance required above the roof?
• In which position should enclosures for overcurrent devices be mounted?
• In a string of 2' x 4' lay-in fluorescent luminaires using the looping wiring method, what is the maximum distance permitted between two supports?
• When installed in thermal insulation, the ampacity of armored cable conductors relates to what rating?
• According to the NEC®, what is the smallest gauge permitted for branch circuit conductors for appliances other than cooking appliances?
• What is the smallest 4" square metal box required for a setup involving multiple #12 MC cables?
• Compliance with the provisions of the Code will result in what?
• Which category does Article 225 in the NEC pertain to?
• What is the main focus of NEC Articles regarding emergency action plans?
• For a 300-amp breaker, what type of load is it primarily designed to supply?
• Select the size of the aluminum equipment grounding conductor required for a circuit protected by a 70-ampere fuse.
• If connected to a metal water piping system, the grounding electrode conductor must be connected within the first what distance of where it enters the building?
• What type of maintenance is necessary for ensuring the safety of energized circuits?
• What does Article 220 in the NEC discuss?
• What load does the example in Informative Annex D Example D6 primarily address?
• Which type of conduit is least durable based on the NEC standards?
• Which document, along with the NEC®, requires field markings on switchboards and panelboards for arc flash hazards?
• OSHA is a federal agency that operates under which department of the U.S. government?
• What is the primary goal of safety-related work practices when working with electrical systems?
• The conductor shown at point IV is ___.
• What is the minimum number of receptacles required in a single-car garage attached to a house according to NEC®?
• For a 120/240-volt, 1Ø, 3-wire service, what is the minimum clearance required above the nearest point accessible to automobiles?
• In which environment is Type UF cable permitted for use?
• What is the importance of having an emergency action plan in the workplace?
• What is the minimum depth required from the top of the conduit to the top of a 3-inch thick sidewalk for a flush-mounted well light?
• What is the content of Chapter 9 in the NEC?
• What is the minimum wire bending space required at I for conductors connected to 350 kcmil lugs, as seen in Figure 210.6?
• What is the maximum rating of a receptacle that can be used on a dedicated branch circuit connected to a 40-A circuit breaker?
• What is the purpose of the NEC®?
• What term refers to the thickness of a conductor, measured in millimeters or inches?
• Are outdoor receptacles at a fast food establishment required to be GFCI protected?
• What is the specific application for conductors with Type TBS insulation?
• A two-gang box contains cables connected to a duplex receptacle and a switch. What is the minimum required cubic inch volume of the box?
• A size ___ AWG equipment grounding conductor is contained in a nonmetallic-sheathed cable marked as 14 AWG.
• In general, a building or structure shall be supplied by only ___ service(s).
• A receptacle under the kitchen counter for a dishwasher is generally allowed to be connected to how many small-appliance branch circuits?
• What type of switch can be used safely with underground installations for a parking attendance shack?
• Where a service mast is used for the support of service drop conductors, it shall be of adequate strength or be supported by ___.
• Which of the following wiring methods is permitted by the NEC® for the service-entrance conductors for residences?
• What must listed or labeled equipment be installed and used in accordance with?
• Where can examples of common calculations usually be found?
• What is the permitted box size when containing two 10/2 with ground MC cables plus one 14/2 with ground MC cable?
• In a metal junction box with 27 cubic inches containing six 12 AWG wires, how many additional 10 AWG conductors can be added?
• Service conductors for a building should ideally not ___ through another building.
• What is the term used in the NEC® to refer to the "hot" conductor of a circuit?
• What does NEC® require for protecting cabling run across floor joists in an attic?
• For which type of circuit is the 80 amp maximum overcurrent protection device rating specifically applicable?
• When ganging two single-gang switch boxes together, what is the smallest box you can use without violating NEC®?
• What type of installations is addressed by Article 680 of the NEC?
• What type of conductor is specifically mentioned in relation to grounding in a pull box?
• How must all metal raceways and boxes be joined together?
• In a multiwire branch circuit, all conductors must originate from the same what?
• When determining the box fill capacity, what factor must be considered with multiple conductors based on the largest conductor?
• In a parking attendant's shack, how many circuits are required for the receptacles if using a 120/208-volt, 3-phase, 4-wire feeder?
• Which of the following is not a consequence of insufficient airspace in a wet location cabinet installation?
• How should cables installed under metal-corrugated sheet roof decking be positioned in relation to the lowest part of the roof?
• To calculate the required service size for household electric clothes dryers, you should refer to which Table?
• When installing a weatherproof cabinet in a wet location, what is the minimum airspace required between the cabinet and the wall?
• Which of the following is NOT a standard size for circuit breakers?
• The minimum size for feeder-circuit conductors should meet the requirement of noncontinuous load plus how much percent of the continuous load?
• In which area of a dwelling unit is GFCI protection required?
• Which enclosure type is suitable for indoor use where splashing water may occur?
• What is the calculated minimum height (top-to-bottom) for the specified pull box dimensions?
• In a grounding electrode system, what is the minimum size grounding electrode conductor permissible?
• In calculating dimensions for a pull box, what width is typically referenced in specifications?
• Which illustration satisfies the Code requirements of 240.22(1)?
• When multiple rod, pipe, or plate electrodes are installed, what is the minimum distance they must be apart?
• How far above the floor must a vertically extended busway be enclosed to protect it from physical damage?
• What device must be used to confirm that the power is off before starting work on a transformer?
• When working near exposed energized conductors, what must each employee use?
• Article 215 in the NEC pertains to what topic?
• In a long underground branch circuit installed in Schedule 40 PVC, what is the smallest equipment grounding conductor permitted?
• What is the smallest trade size of EMT that can be installed between two large pull boxes?
• Which chapter of the NEC focuses on Special Conditions?
• Which NEC article deals with Grounding and Bonding?
• What type of installation requires that the outlet box connections remain accessible?
• What is the minimum size wire permitted for tap conductors between Pull Box 2 and FD #1?
• For connection to a ground rod, what is the minimum size grounding electrode wire needed for a 200-ampere residential service?
• What type of copper wiring is referred to when discussing wiring installable in a residential service?
• Which chapter in the NEC is dedicated to Special Equipment?
• Which article provides regulations for Emergency Systems in the NEC?
• What should be done to all cut ends of rigid conduit?
• What is the maximum size for a circuit breaker protecting 1 AWG conductors for a load that operates for no more than 3 hours?
• Unused openings in panelboards can be closed using what?
• What does Chapter 8 of the NEC cover?
• How many fuses are required to protect a 120-volt, 1-phase, 2-wire branch circuit in a 600-volt fused safety switch?
• What type of circuits does Article 225 specifically deal with?
• Where are the requirements for the minimum number of branch circuits in a dwelling found?
• Which type of conduit has a greater wall thickness when comparing 1/2 IMC and 1/2 RMC?
• The equipment grounding conductor is sized according to which of the following?
• In a 480/277-volt, 3Ø, 4-W panel, which wire color is permitted by the NEC® for a wire connected to breaker 41?
• In a 4-wire, delta-connected system with a grounded midpoint, the conductor with the higher phase voltage must be marked with which color?
• Branch circuits and feeder conductors shall not be installed in the same ___ with service conductors.
• What happens to AFCI protection when a 10-foot branch circuit extension is added to a dwelling family room?
• Which color is typically reserved for grounded conductors?
• What is the minimum height of the point of attachment for service-drop conductors to a building above finish grade?
• Which term describes a unit of an electrical system that carries or controls electric energy as its principal function?
• What is the maximum loading for a living room branch circuit in a dwelling with a 20-ampere rating?
• When 10 AWG THHN/THWN copper conductors are connected to a 15-amp circuit breaker, what is the rating of the branch circuit?
• Which of the following is NOT a recommended practice when dealing with electrical hazards?
• According to code specifications, what is the total rating limit for hard-wired utilization equipment on a 15-amp branch circuit?
• Ceiling-suspended fans are required to be installed on boxes marked as suitable for what purpose?
• What must be supported if festoon lighting exceeds specific length limitations?
• What is the purpose of overcurrent protection devices in a branch circuit?
• In vertical conduit runs, how do the support requirements for aluminum conductors compare to those for copper conductors?
• When a single receptacle is connected to a branch circuit with no other loads, what is the required ampere rating of the receptacle?
• What does GFCI stand for in electrical safety?
• What is required for terminals used for connecting multiple conductors according to the NEC®?
• What is the primary requirement for feeder conductors installed in a metal raceway that share a common neutral conductor?
• What is the required air space between the wall and conduit in areas where walls are frequently washed?
• Which option describes a condition under which a ladder should not be used?
• Which of the following factors is most critical when rating the capacity of a branch circuit?
• What is the smallest standard size metal box that accommodates a single 1/2" romex connector and additional wiring components?
• In a wall made of noncombustible material, the front edge of the cabinet should not be set back from the finished surface by more than what measurement?
• A steel metal cable tray serving as an equipment grounding conductor must have what minimum cross-sectional area?
• In a 3-pole, 600-volt fused safety switch, what is the typical voltage supply of a branch circuit needing protection?
• What thickness must sheet steel be for a metal box as specified by the NEC®?
• What is the minimum distance that must be measured from the lowest surface of the roof decking to the top of the cable when installed under metal-corrugated sheet roof decking?
• A ceiling fan that weighs ___ pounds or less can be supported by a specially identified outlet box.
• According to the NEC®, what is the smallest permissible wire size for branch circuit conductors that serve appliances other than cooking appliances?
• Service conductors must be sized for not less than ___ percent of the continuous load plus 100 percent of the noncontinuous load.
• Guest suites in hotels with permanent cooking provisions are required to have AFCI protection for what area?
• Which of the following dimensions for "height" is accepted for a pull box with various arms?
• Where in a kitchen are receptacles required to be GFCI protected?
• What is the maximum size circuit breaker permitted for a 10 AWG copper conductor with a corrected ampacity of 12.86 amps?
• Which industrial cover/box combination violates the NEC®?
• Which statement is an example of mandatory language in the NEC®?
• According to the NEC®, which combination of bends is permitted in a conduit run between two junction boxes?
• In load calculations, how do you determine the demand factor for both residential and commercial kitchens?
• Which of the following is not allowed to act as a concrete encased electrode?
• For a feeder supplying household cooking equipment and electric clothes dryers, how is the maximum unbalanced load on the neutral conductor defined?
• Before turning on the power to the transformer, what actions must be taken?
• What action should be taken regarding live parts that employees may be exposed to?
• What is the subject of Article 242 Part II in the NEC?
• Which method of grounding cord-and-plug-connected equipment is NOT permitted according to Section 250.138?
• The feeder conductor ampacity must be equal to or greater than the service-entrance conductors for loads with an ampacity of how many amperes or less?
• How is the general-purpose lighting load calculated per square foot of area for residential service?
• What is the minimum trade size EMT required for a 45' long run containing various THHN/THWN conductors?
• Service disconnecting means shall not be located in ___.
• Which type of environment restricts the use of standard NM cable?
• For large service-entrance conductors over the specified sizes, what percentage of the conductor area must the main bonding jumper be?
• When overcurrent devices are selectively coordinated and a fault occurs somewhere on a branch circuit, what is expected to happen?
• Which of the following is NOT a permissible material for electrical metallic tubing?
• How does the NEC® address receptacle placement in kitchens?
• For calculations required in Article 220, the total area of occupancy is determined from which dimensions of the building?
• In the NEC, which chapter addresses Communications Systems?
• Any tasks that are part of your job duties must be outlined in what document?
• What must a supply system include if grounded interior wiring is to be connected to it?
• Is live vegetation such as trees allowed to support overhead conductor spans?
• Which wiring method is permitted in ducts or plenums designed to transport environmental air?
• Which article focuses on Transformers and Transformer Vaults?
• What is the primary subject of Article 230 in the NEC?
• What is the total minimum ampacity requirement for a circuit containing various wire sizes?
• What is the required minimum clearance for overhead service conductors installed over train tracks?
• What is the preferred size of wire to use for circuits that will carry load current less than 60 amps?
• The circular mil area of a 250 kcmil bare copper cable is what measurement?
• Which of these practices is essential for safety when performing electrical installations?
• Which article of the NEC is concerned with Busways?
• What does Article 100 in the NEC cover?
• What should be used to connect the grounding terminal of a grounding type receptacle to a grounded box?
• Which of the following terms describes the support required by conduit installations?
• Which of the following articles covers safety procedures for electrical installations?
• What type of grounding electrode is required if the only available grounding electrode is a metal underground water pipe?
• For a raceway containing 30 current carrying conductors, what percentage is the ampacity of each conductor reduced to?
• Chapter 9 of the NEC is primarily concerned with what?
• In an attic with permanent stairs, how high must substantial guard strips be when protecting nonmetallic sheathed cable?
• What is the maximum area fill percentage for conductors, including splices and taps, in metal surface raceways?
• What is the main purpose of a guard strip used in cable installation?
• What percentage of OSHA's workforce is made up of field inspectors (compliance officers)?
• When connecting a feeder at the shack, what type of panel is permitted if all breaker spaces are occupied?
• What does the NEC® specify as the maximum number of receptacles that can be connected to a 15-amp, 120-volt branch circuit in a school?
• What is the minimum length of a box for straight pulls of conductors 4 AWG and larger relative to the trade diameter of the largest raceway?
• What is the minimum depth of concrete required to cover a conduit containing service entrance conductors beneath a building for it to be considered "outside"?
• According to NEC® guidelines, busbars within a panel are classified as which type of conductors?
• What does PPE stand for in the context of electrical safety?
• What characterizes Type _____ cable?
• In what location should service disconnecting means not be installed according to regulations?
• Which article describes the Requirements for Electrical Installation?
• How many joints between supports are permissible for vertical runs of metal wireways?
• What is the maximum height above the floor for the operating handle of switches or circuit breakers?
• Is it true that all states use the federal OSHA program for safety enforcement?
• What is an acceptable use for nonmetallic sheathed cable?
• When considering conductor material, which has lower resistance?
• How frequently should an emergency action plan be reviewed with employees?
• In a dwelling, how many 20-amp branch circuits are required to supply power to a clothes washing machine?
• Which of the following defines the conditions for using Type 3 surge protective devices?
• Which materials are permitted to protect a Grounding Electrode Conductor (GEC) from physical damage?
• Which type of component assemblies should only be installed by the equipment manufacturer?
• Which article in the NEC covers Solar Photovoltaic (PV) Systems?
• If a fuse label is not marked with a fuse interrupting rating, what is the default interrupting rating?
• What is the minimum wall space width that requires a receptacle outlet in a dwelling?
• What is the introduction to the NEC described in?
• What is the maximum allowable voltage for a branch circuit supplying lighting fixtures in a residence?
• What is the purpose of sizing the feeder conductors properly?
• In the case of feeders with a common neutral, what is one accepted configuration?
• Is the conduit between street lighting poles covered by the NEC® if installed in a utility easement?
• What does a motor control center primarily contain?
• For messenger-supported wiring, how should conductors enter the box?
• What is the maximum weight for a wall-mounted luminaire that can be mounted to and supported by a standard support?
• Which type of installation does not require additional support for nonmetallic sheathed cable?
• What type of environments is Type TC power and control cable approved for?
• What is an appropriate method when running service conductors through bored holes in wood members according to NEC?
• What does Article 110 in the NEC address?
• No additional support is required for a conduit installation if the conduit length from the finish surface to the box is ___ inches or less.
• The area of a conductor is measured in what units?
• How many insulated conductors does the suffix 'I' indicate when referencing conductor cable?
• What does the term 'ampacity' measure in electrical wiring?
• Which type of cable is generally used for branch circuits?
• Can the installation shown in Figure 208.1, where the box is only supported by conduits, be permitted by NEC®?
• For a 300 KVA transformer providing power to a 180-amp load, what is the maximum rating for the secondary OCPD?
• What is the maximum fill allowed in a conduit when installing conductors?
• According to NEC® minimum requirements, how many receptacles should be installed along a 15-foot long kitchen countertop in a house?
• What is included in an emergency action plan?
• What is the ampacity rating of a 1/0 TW copper conductor?
• What is a critical consideration for conductor size in a circuit?
• Which article is concerned with Fire Pumps?
• How many 3/0 conductors can be installed in a specified conduit alongside other conductors?
• Type TC power and control cable may be used in what situation?
• What is the minimum distance from the edge of a raceway to a box as required by the NEC?
• Nonmetallic boxes must be suitable for the lowest ___ conductor entering the box.
• Before conducting work on a transformer, what should be confirmed about the system?
• What is the maximum current allowed in bare copper bars within auxiliary gutters?
• How is the size of a grounding conductor determined in an installation?
• What type of conduit is NOT permitted to protect a grounding electrode conductor from physical damage?
• What is the purpose of a ground fault circuit interrupter (GFCI)?
• What is the minimum demand load required for general-purpose receptacles in an office building with 150 receptacles?
• When installing more than two conductors in a 50-foot run of 3-inch intermediate metal conduit, what is the maximum fill area allowed?
• What is the focus of Article 525 in the NEC?
• In Informative Annex D Example D1(a), what is the calculated load for neutral in a one-family dwelling?
• Which circuits shall not be included with the general lighting load according to NEC®?
• High Density Polyethylene conduit larger than what size should not be used?
• When laying out receptacle locations in a bedroom, what is the minimum wall space width that requires a receptacle?
• How far away can a single-family dwelling's receptacle be from any point measured along the floorline?
• For straight pulls of 2 AWG conductors through a junction box, what is the minimum box length requirement?
• Type AC cable is allowed for branch circuits and feeders in which locations?
• What is a requirement for the grounded conductor of a branch circuit that is 6 AWG or smaller?
• What is the purpose of using expansion fittings in PVC installations?
• When calculating corrected ampacity for a THHN/THWN conductor, which temperature rating is used?
• In walls constructed of what material may the front edge of an outlet box be set back up to 1/4 inch?
• How should the conductors within a branch circuit be treated when it comes to electrical grounding?
• How many 12/2 AWG with ground, type NM cables can be installed in an 18 cubic inch outlet box with a duplex receptacle?
• Which type of cable is prohibited for use in damp or wet locations?
• What type of protection do the fuses in the nail salon safety switch provide for the ungrounded service conductors?
• What is the maximum size of the fuses that can be installed in Safety Switch #1?
• What must each outlet box have in completed installations?
• What additional requirement should be met when using a white conductor that is not grounded?
• The NEC permits nonmetallic outlet and device boxes to be installed with nonmetallic sheathed cable in which section?
• Which type of cable must be flame-retardant, moisture-resistant, fungus-resistant, and corrosion-resistant?
• Which chapter of the NEC is dedicated to Special Conditions?
• If the equipment grounding conductor is run inside flexible metal conduit (FMC) and measures 8 feet, is this compliant with code?
• Which of the following receptacles is permissible on a 20-amp, 120-volt branch circuit?
• What consideration is essential for achieving reasonable efficiency when sizing feeder conductors?
• A nonfused safety switch with a voltage rating of 600 volts is:
• What term refers to the protection measures installed to prevent falls from elevated surfaces?
• What does Article 90 in the NEC focus on?
• Which requirement is included in NEC® for small appliance circuits in residential kitchens?
• What type of protection is required for receptacles installed in an unfinished residential basement?
• How many additional supports must be installed between support #1 and support #2 for a 26 feet Type AC cable installation?
• When is the use of a disconnecting means required?
• What is the minimum separation required between conductors on poles not placed on racks or brackets?
• What should be considered when sizing feeder conductors to ensure compliance with safety standards?
• What is the maximum distance from any point along the floorline to the nearest receptacle in a single-family dwelling?
• What kind of wiring is typically used for inside feeder installations?
• For a branch circuit that provides power to lights on a single-sided billboard, what is the minimum ampacity for the ungrounded service conductors when the load is 6 amps?
• What is the main purpose of equipment grounding conductors?
• Angle pull dimensional requirements apply to junction boxes only when the size of conductors is equal to or larger than which AWG?