California Electrician PrepCertification, exam and code, in one place

Checked against primary sources 2026-09-05

The layer on top of the model code

California Electrical Code Amendments: Title 24 Part 3

California doesn't reprint the National Electrical Code. It adopts it and changes parts of it, and the result is Title 24 Part 3. This page explains what that amendment layer is, where the documents are, and why it doesn't show up on the certification exam.

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On this page
  1. What an amendment is here
  2. What we can show you, and what we can't
  3. Why none of this is on the certification exam
  4. Local amendments, which are real and enforceable
  5. The order that decides an argument
  6. How to check your own jurisdiction
  7. Questions people ask
  8. What this page cites

What an amendment is here

The California Building Standards Commission adopts a model code and then publishes California's version of it. For electrical work that model is the National Electrical Code and the published result is Part 3 of Title 24, the California Electrical Code.

The Commission's Initial Statement of Reasons for the Part 3 rulemaking, BSC 01-23, records the decision to adopt the 2023 NEC. That rulemaking belongs to the 2024 Triennial Code Cycle, and its output is the 2025 California Electrical Code, effective January 1, 2026.

So an amendment is a change California made on the way in, and it lives in the state document rather than in the NFPA one.

What we can show you, and what we can't

We're going to be straight about the limit here. We have the adoption record and the correction document, and we did not reach a published section by section list of California's changes to the electrical part this session.

So this page names the documents rather than printing a list we can't cite. The two to hold are the Commission's rulemaking file for BSC 01-23 Part 3, and the errata for the 2025 Title 24 Part 3, effective January 1, 2026, which corrects non substantive printing errors and omissions.

If you need the amended sections themselves, the amended text is what Part 3 prints. Buy or open the California Electrical Code and read it, rather than reading the NEC and guessing at the deltas.

Why none of this is on the certification exam

The Candidate Information Bulletin lists what the testing system supplies, and the code on that list is NFPA 70, the National Electrical Code, 2023 Edition. Not Title 24 Part 3.

So the questions turn on the model code. Studying a California amendment list for the exam is time spent on the wrong document, and we'd rather say that than sell you a state specific study guide that isn't what the paper tests.

Where the amendment layer does matter is on the job: permits, inspections and anything a plan checker signs. Which code edition applies covers that side.

Local amendments, which are real and enforceable

California lets local authorities adopt the state code with their own changes, so there's a third layer under the model code and the state one.

Los Angeles County. Title 27 of the county code adopts the 2025 California Electrical Code by reference, taking in Article 90, Chapters 1 through 9 and the annexes, and applying the county's own changes and modifications on top. It's effective January 1, 2026.

City of Los Angeles. Los Angeles Municipal Code section 93.0101 names the city document the Los Angeles Electrical Code. Section 93.0700 adopts the NEC, the California Electrical Code and the California Building Standards Code by reference, and provides that where the NEC, the CEC and the Municipal Code conflict, LAMC section 93.0105 prevails. Section 93.0402 requires electrical equipment as defined in California Electrical Code Article 100 to be approved by the Department or listed by a Department approved electrical testing agency.

San Francisco. The Electrical Inspection Division states that the city enforces the 2025 California Electrical Code.

The order that decides an argument

The Los Angeles ordering is the clearest published example: local code first, then the state code, then the model code.

That's the order to carry into any conversation with a plan checker. If your local jurisdiction has amended something, the local text governs, and the fact that the NEC says otherwise is not an argument.

It also explains why an out of state electrician's habits travel badly. The rule you learned may be the model rule, and the jurisdiction you're standing in may have changed it.

How to check your own jurisdiction

Start with the state. The Building Standards Commission publishes Title 24 and the errata for each part.

Then the county. Los Angeles County publishes its electrical code amendments as a document you can download.

Then the city. San Francisco's inspection division states its edition on its own page. The City of Los Angeles is the one we could not settle: section 93.0700 adopts by reference without printing an edition year, and a code library page for the same article was read as referencing the 2022 California Electrical Code. Ask the Department of Building and Safety.

Then ask. The person who inspects your work is the authority on what your work is inspected against.

Questions people ask

Does California amend the NEC?

Yes. The Building Standards Commission adopts the model code and publishes California's version as Title 24 Part 3, the California Electrical Code. The amended text is what Part 3 prints.

Where do I find the California amendments?

In the California Electrical Code itself, published by the Building Standards Commission. We did not reach a published section by section list of the changes this session, so we're pointing you at the document rather than at a summary.

Are California amendments on the certification exam?

No. The bulletin lists NFPA 70, the National Electrical Code 2023 Edition, as the code supplied on screen, so the questions turn on the model code rather than on Title 24 Part 3.

Can my city change the electrical code?

Yes. Los Angeles County adopts the state code with its own changes in Title 27, and Los Angeles Municipal Code section 93.0700 provides that LAMC section 93.0105 prevails where the NEC, the California Electrical Code and the Municipal Code conflict.

What is the errata?

A correction document from the Building Standards Commission for the 2025 Title 24 Part 3, effective January 1, 2026, covering non substantive printing errors and omissions. Worth downloading if you work from a printed copy.

Which document wins if they disagree?

In the City of Los Angeles section 93.0700 names one section as the winner: where the NEC, the California Electrical Code and the Municipal Code conflict, LAMC section 93.0105 prevails. As a general habit, read local first, then state, then model, and confirm with the authority that inspects your work.

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What this page cites

If your book is the other edition

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Built and maintained by Jeff Clerisier, Trojan Digital Marketing.

Every rule here is cited to the section it comes from, and corrections are logged in public with the date. This is study material rather than electrical advice, and it does not replace your own code book or your inspector.

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