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?

The correct choice indicates that both non-fused and fused safety switches are acceptable terminations for the specified electrical configuration. In a residential, commercial, or similar setting, a 120/240-volt, single-phase, three-wire branch circuit typically requires a means of disconnect to ensure safety and compliance with the National Electrical Code (NEC).

A non-fused safety switch provides a safe way to disconnect the circuit, allowing maintenance to be performed without the risk of electrical shock. This type is suitable for most applications, particularly when the load is known and does not require additional protection.

On the other hand, a fused safety switch offers an extra layer of protection by incorporating fuses that can blow in the event of an overload or short circuit. This prevents damage to electrical components and reduces the risk of fire hazards. In areas susceptible to such risks, having a fused switch can provide peace of mind.

The flexibility to use either type of switch allows electricians to choose based on the specific needs of the installation or recommendations from local codes. Thus, indicating both options as acceptable caters to varying safety and operational considerations while ensuring compliance with electrical installation standards.