Master Electrician Practice Exam

What type of conductor is required for a tap conductor of 25 ft. from 100 ampere rated feeder?

1. Flexible conductor

2. Rigid conductor

3. Service entrance conductor

4. Non-metallic conductor

The correct answer is: Rigid conductor

The correct answer is a rigid conductor because tap conductors are typically required to be rigid in applications where they connect to a feeder, particularly when the feeder is rated at 100 amperes. This requirement is based on the need for mechanical support and safeguarding against physical damage, as well as ensuring that the connections remain secure under typical environmental stresses. Rigid conductors provide the necessary physical structure and support needed in installations, especially when running the conductor over a distance, such as the 25 feet specified in the question. In contrast, flexible conductors may be more suited for other applications where movement or flexibility is necessary, but they do not provide the same level of support or protection needed for longer runs associated with tap conductors. Service entrance conductors are specifically intended for the main supply to a structure and would not apply in a scenario focused on a tap connection. Non-metallic conductors might be used in certain applications like residential wiring, but for a situation involving a tap from a feeder, a rigid conductor is the standard and safest choice.