What minimum wireway size is needed to contain one hundred #8 THHN/THWN conductors?

To determine the minimum wireway size needed to contain one hundred #8 THHN/THWN conductors, you must refer to the National Electrical Code (NEC) and various conductor fill tables. For #8 AWG THHN/THWN conductors, each wire has a specific fill capacity, and it is vital to adhere to the code's requirements to ensure safety and compliance.

The NEC provides guidelines for wire fill in raceways, including wireways, stating that the maximum fill for conductors should not exceed 40% of the wireway's cross-sectional area for conductors that are not larger than a certain size. By calculating the total cross-sectional area required for one hundred #8 conductors and matching it against the available options, you will find that a 6" x 6" wireway meets the fill requirement effectively.

The calculated area for the specific number of conductors confirms that option B provides adequate space while remaining within the code limitations. Additionally, larger wireway sizes would exceed the necessary requirements, while smaller sizes would not accommodate the conductors adequately. Thus, selecting a 6" x 6" wireway ensures compliance and functionality.