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Checked against primary sources 2026-09-07

Built for a clean book

Colorado Electrician Exam Study Plan: Eight Weeks

Most exam plans assume you will spend weeks tabbing your own code book. Colorado does not allow that, so this plan spends the same weeks on a different skill. Eight weeks, four hours a week, and a timed test at both ends of it.

Test yourself: thirty free questions, timed

On this page
  1. The three constraints this plan is built around
  2. Before week one: get a baseline
  3. Weeks one and two: navigation
  4. Weeks three to five: the calculation subjects
  5. Weeks six and seven: grounding, methods and the rest
  6. Week eight: the clock, twice
  7. If you only have two weeks
  8. What not to spend the time on
  9. Questions people ask
  10. What this page cites

The three constraints this plan is built around

You cannot mark the book. PSI supplies the code book and formula page, and you may not write, highlight, underline or index on them, or use any other materials. So a tab set is wasted money and a personal index is wasted time.

You have two minutes forty seconds a question. Ninety scored items in 240 minutes, with 63 correct to pass.

The questions are on the 2026 edition. Since August 1, 2026. If you learned on the 2023 book, the knowledge carries but the numbers need re-checking.

Before week one: get a baseline

Sit the free diagnostic before you study anything. Twenty four questions, ranked worst first.

Write down the two weakest subjects and the total time you took. Both numbers matter, because Colorado fails people for slowness as often as for ignorance and the result letter will never tell you which it was.

Then get hold of a 2026 National Electrical Code you can read but do not need to keep pristine, and a second clean one if you can, because your practice should end on a book you have not annotated.

Weeks one and two: navigation

The goal is to open the book at the right article without the index.

Work through the chapter order until you can say what lives where. Then practice the move that actually saves time: get to the article, then use the list of parts at its front, then the section heading.

Do it against a clock with the drill, which is built for finding rather than recalling. Twenty minutes a session is enough, four sessions a week.

By the end of week two you should be able to find any named subject in under a minute in a book you did not prepare.

Weeks three to five: the calculation subjects

These carry the marks that repay study, and they are the ones that survive an edition change untouched.

Conductor sizing and ampacity, with correction and adjustment. Branch circuit, feeder and service calculations. Box and raceway fill. Motor circuit sizing, where the conductor, the overload and the short circuit protection come from different rules. Transformer protection. Voltage drop.

Work them in the topic sets with the book open beside you and the calculator you will not have. Use the calculators to check your working afterwards, not during.

Add the two subjects your diagnostic put at the bottom, if they are not already here.

Weeks six and seven: grounding, methods and the rest

Grounding and bonding first, because the state names it first among its own competencies and because it is where confident electricians lose marks to precise wording.

Then wiring methods and materials, then the special occupancy and special equipment chapters that people skip. You do not need mastery there, you need to know the chapter exists and roughly where its rules sit.

Spot the error is useful in these weeks, because it puts a described installation in front of you and asks what is wrong, which is the same move the exam asks for.

Week eight: the clock, twice

Sit the timed practice test at the start of the week and again at the end, both under a real clock with a clean book.

Between them, do not learn anything new. Re-work every question you missed, using the shown working, and check your pace on the ones you got right slowly.

Then read the test day page and check your identification expiry, because that is a way to lose a fee that has nothing to do with the code.

If you only have two weeks

Cut the plan to its two load bearing parts.

Week one: navigation drills every day, plus the two weakest subjects from your diagnostic.

Week two: two timed practice tests, with every miss re-worked in between.

Skip the special occupancy reading. Twenty seven wrong answers are survivable and you cannot fix everything, so protect the subjects where a wrong answer costs you several questions rather than one.

What not to spend the time on

Do not buy tabs. Do not build a personal index. Do not memorize page numbers, because the physical book at the center is not yours.

Do not chase a pass rate to decide how hard to work. None is published for any Colorado paper by the Board, DORA or PSI.

And do not hunt for an official content outline. There is not one, and the exam content page explains what we use instead.

Questions people ask

How long should I study for the Colorado electrician exam?

This plan runs eight weeks at about four hours a week, with a timed diagnostic before it starts and two timed practice tests at the end. It compresses to two weeks if you are already working in the trade.

Should I tab my code book?

No. PSI supplies the code book and bars writing, highlighting, underlining and indexing on it, and bars any other materials. Practise on a clean copy instead.

Which edition should I study?

The 2026 National Electrical Code. Questions have been consistent with that edition since August 1, 2026 and it is the book supplied at the test center.

How fast do I need to be?

240 minutes for 90 scored items is two minutes forty seconds a question. Time your practice, because a Colorado result letter says pass or fail and will not tell you that time was the problem.

What if I do not know my weak subjects?

Sit the free diagnostic first. It runs 24 questions across the main subjects and ranks them worst first, which is faster than guessing and more accurate than how a study session felt.

Is there an official Colorado study guide?

None that we found. The Board publishes no content outline and PSI's bulletin lists no reference list beyond the supplied code book and formula page.

Put it to the test

Thirty free questions, timed, with the working shown

Every miss comes back with the arithmetic worked out and the code section named, so you learn the trap and not just the answer. No account.

Start the free practice testSee the $79 question bank

All questions here are original. They are not actual exam questions, and no question bank can promise you a pass.

What this page cites

If your notes still say 2023

The 2023 to 2026 section crosswalk maps every section that moved, both directions, $29 once.

NEC and National Electrical Code are registered trademarks of the National Fire Protection Association.

Trojan Digital Marketing is an independent company. We are not affiliated with, endorsed by, or sponsored by NFPA, the Colorado State Electrical Board, PSI, or any licensing authority, school or union.

The Colorado examinations are open book only in the sense that PSI puts a book on the desk. PSI provides the National Electrical Code and a formula page at the test center, bars writing, highlighting, underlining and indexing on them, and allows no other materials. The questions have followed the 2026 edition since 1 August 2026, and the 2023 book is provided on request until 1 November 2026.

All practice questions are original. They are not actual exam questions.

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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