Electrify Your Future: Ace the California C-10 Contractor License Exam 2026!

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Which statement best describes the relationship between the NEC and California amendments?

It is adopted with state amendments in the California Electrical Code

California uses the National Electrical Code as the base, but the state adopts it with its own amendments. The result is the California Electrical Code, which combines NEC language with California-specific changes published as Title 24 of the California Code of Regulations. Installations in California must comply with both the NEC provisions and these state amendments. This is why the described relationship—adoption with state amendments in the California Electrical Code—is the correct understanding. The NEC is indeed used in California, it isn’t left unchanged, and it covers more than just residential work.

It is not used in California

It is unchanged from the national standard with no modifications

It applies only to residential installations