Journeyman Electrician Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What is the minimum length a pull box must be when handling conductors of size 4 AWG and larger?

4 times the trade diameter of the largest conduit

6 times the trade diameter of the largest conduit

8 times the trade diameter of the largest conduit

The correct choice is based on the National Electrical Code (NEC), which specifies requirements for pull boxes used in electrical installations to ensure safe and efficient wire pulling. When handling conductors of size 4 AWG and larger, the NEC mandates that the pull box must have a minimum length that is 8 times the trade diameter of the largest conduit entering the box.

This requirement exists to provide adequate space for conductors to be pulled around bends without undue stress or damage. The extra length accommodates the bending radius of the conductors, ensuring that the installation remains compliant with industry standards and best practices.

In situations involving larger conductors, failing to meet this minimum length can lead to difficult pulls, potential damage to the conductors, and a compromised electrical system. Therefore, adhering to this regulation is crucial for both safety and functionality in electrical installations.

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10 times the trade diameter of the largest conduit

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