Question 5049 of 790 · California General Electrician Exam
A service raceway enters an enclosure through a knockout with concentric rings left in place. Which bonding method alone is NOT acceptable?
Exactly one answer is correct.
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Correct answer to question 5049
- A: A standard locknut only
Explanation
Service raceways must be bonded by threaded connections, threadless couplings made tight, bonding jumpers, or other listed devices. Bonding jumpers are required around impaired connections such as concentric or eccentric knockouts, and a standard locknut alone is not sufficient. See 250.92(B).
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