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Checked against primary sources 2026-09-07

A different vendor, a different code

Denver Electrical Exams 380 and 377: On the 2014 NEC

Denver has at least two electrical examinations of its own. They are not run by PSI, they are not on the state's code edition, and almost nobody writes about them. Here is everything the one readable source says, and a clear line around what it does not say.

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On this page
  1. The two exams, as the bulletin prints them
  2. The 2014 edition, four editions back
  3. A different vendor
  4. Open book, and the bulletin's own warning
  5. The other Denver exams in the same bulletin
  6. Two class numbers that may not exist
  7. What we could not read, which is everything else
  8. The state license still applies
  9. Questions people ask
  10. What this page cites

The two exams, as the bulletin prints them

The ICC contractor and trades examination information bulletin for Denver, dated June 3, 2026, lists two Denver electrical examinations.

Exam 380, Colorado (Denver) Journeyman Electrical Signal. 40 multiple-choice questions. 3-hour time limit. PearsonVUE: $115. Open book. References listed: NFPA 70: National Electrical Code (NEC), 2014; 2015 International Building Code; 2016 NFPA 72.

Exam 377, Colorado (Denver) Electrical Signal Supervisor. 40 multiple-choice questions. 2-hour time limit. PearsonVUE: $115. Open book. References listed: 2015 International Building Code; NFPA 70: National Electrical Code (NEC), 2014; 2013 NFPA 72.

Both are signal and low voltage credentials rather than general electrical licenses. Note that the two papers list different NFPA 72 editions, 2016 for one and 2013 for the other, in the same bulletin.

The 2014 edition, four editions back

This is the fact that makes the page worth writing. Denver's electrical signal exams are written to the 2014 National Electrical Code, as of a bulletin dated June 3, 2026.

Colorado's state code has been the 2026 edition since July 15, 2026, and the state exam has been on the 2026 edition since August 1, 2026. Counting 2017, 2020, 2023 and 2026, the Denver signal exams are four editions behind the state code.

That is a real, checkable divergence rather than a rumor. It also means the study material for a Denver signal exam is not the study material for a state journeyman exam, and anything written to the 2026 numbering will not match the reference the Denver bulletin names.

A different vendor

The state's four examinations run through PSI, and it is PSI's bulletin that says so: the Board has contracted with PSI Services LLC to conduct its examination program. Board rule 3 CCR 710-1.8.E names no vendor. It says the Board designates the Division to secure such means to conduct and grade examinations pursuant to their authority in section 12-115-110(4)(a), C.R.S.

The Denver examinations in this bulletin run through Pearson VUE, at $115 each.

Different vendor, different scheduling, different centers, different rules in the room. Do not carry an assumption from one to the other, including the assumption about who supplies the book.

Open book, and the bulletin's own warning

Both Denver papers are marked open book, which is a different arrangement from the state exams where PSI supplies a book you may not mark.

The ICC bulletin's general advice is worth quoting because it is the only preparation guidance in the document: because of the time constraints, you will not have time to look up all of the answers. For those answers you must look up, you must be VERY familiar with the references to avoid wasting time searching for information.

Forty questions in three hours on exam 380 is four and a half minutes each. Forty in two hours on exam 377 is three minutes each. The second one is the tighter paper by a wide margin.

The other Denver exams in the same bulletin

For completeness, because people searching for one of these often land on the wrong page.

491 Demolition Class A, 50 questions, 2 hours, $115. 492 Demolition Class B, 30 questions, 1 hour 30 minutes, $115. 493 Moving Supervisor, 30 questions, 1 hour 30 minutes. 227 Stationary Engineer, 60 questions, 3 hours, $115. 228 Refrigeration Operator, 50 questions, 2 hours 30 minutes, $115. The bulletin also carries National Standard building, mechanical, fire suppression and gas pipe fitter exams.

No passing score is stated in the bulletin for any of them, including the two electrical papers.

Two class numbers that may not exist

A prep site sells practice tests for Denver classes 490 Access Control Supervisor and 494 Electrical Sign Supervisor.

Neither class appears in the June 3, 2026 ICC bulletin, which lists 491, 492, 493, 380 and 377 for Denver. Either those classes are examined somewhere else, or they have been retired, or the material is being sold for classes that no longer exist.

We are not resolving it, and we are not guessing. If you are about to buy study material for a Denver class, confirm the class still exists with the City first.

What we could not read, which is everything else

Every denvergov.org page we tried returned a robots error, on 5 September and again on 7 September 2026. That includes the electrical certificates page, the contractor licensing pages, the supervisor certificates page and the contractor license application. The mirror host failed the same way, a municipal code library returned page metadata only, and a code hosting site returned a robots error.

So we cannot tell you Denver's certificate classes beyond these two, whether a state license is a prerequisite, what the fees are, what the renewal cycle is, or whether continuing education applies.

Everything on this page comes from one document: the ICC bulletin dated June 3, 2026. If you need the rest, call the City and County of Denver directly, and treat any site that gives you Denver certificate detail without naming a source with suspicion.

The state license still applies

Whatever Denver requires on top, C.R.S. 12-115-109(1) still bars anyone from working at the trade of journeyman electrician, master electrician or residential wireman in this state without a state license or permit.

Denver's own program sits under C.R.S. 12-115-120, which lets a city or county with a qualifying building department or its own electrical code and inspection program handle permits and inspections locally.

The state also runs contemporaneous review procedures requiring a county, city, town or qualified state institution of higher education conducting its own inspections to ensure reviews of electricians and apprentices comply with state licensing and apprentice ratio laws. So Denver checks state credentials whether or not it issues its own. The Denver city page has the rest.

Questions people ask

Does Denver run its own electrician exams?

At least two. The ICC bulletin dated June 3, 2026 lists exam 380 Colorado (Denver) Journeyman Electrical Signal and exam 377 Colorado (Denver) Electrical Signal Supervisor, both through Pearson VUE.

What do the Denver electrical exams cost?

$115 each through Pearson VUE, on the June 3, 2026 ICC bulletin. That is the only fee figure the document gives for these two papers.

Which code edition are the Denver exams on?

The 2014 National Electrical Code, as of the June 3, 2026 bulletin. The state code and the state exam are both on the 2026 edition, so the Denver signal papers are four editions behind.

How many questions are on Denver exam 380?

40 multiple-choice questions with a 3-hour time limit, open book. Exam 377 is also 40 questions but with a 2-hour limit.

What is the passing score for the Denver exams?

The bulletin does not state one, for either electrical paper or for any of the other Denver exams it lists.

Do I still need the state license if I hold a Denver certificate?

C.R.S. 12-115-109(1) requires a state license or permit before you work at the trade in Colorado. Denver's own requirements sit on top of that, and we could not read the Denver pages that would explain how they interact.

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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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