Free Practice Test
Colorado Residential Wireman
Try 10 questions weighted like the real PSI exam — dwelling branch circuits and services, general knowledge, grounding and bonding, and calculations — on the 2026 NEC, the edition Colorado has tested since August 1, 2026. You get a score for each area and a worked explanation for every calculation.
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The Colorado Residential Wireman exam is 90 scored questions in 4 hours, and you need 70% to pass. PSI supplies an unmarked 2026 NEC at the test center, so knowing where the dwelling rules live in Articles 210, 230 and 250 matters as much as knowing them.
Related reading
Colorado Residential Wireman Exam Day: PSI, the Supplied Code Book, and Pacing 4 Hours
What to expect at a PSI center for the Colorado residential wireman exam: one photo ID, an unmarked 2026 NEC and formula page supplied at the center, the online calculator, the two-day cancellation rule, and pacing 90 scored questions.
What's on the Colorado Residential Wireman Exam? The Nine Areas and the Dwelling Rules to Know
The PSI Residential Wireman outline: 90 scored items across nine areas, led by services, feeders and branch circuits (18) and general electrical knowledge (17), on the 2026 NEC — and a study plan built on the weights.
Colorado Residential Wireman License: Requirements, Hours, and How to Apply
What the Colorado State Electrical Board requires for a residential wireman license: 4,000 hours over two years wiring one- to four-family dwellings or two years of accredited training, the PSI exam, renewal and endorsement.