U.S. code adoption
Colorado — energy & appliance code adoption
Yes — effectively. This page summarizes electrical (NEC), appliance-listing (UL 858), fire-code, and energy-storage (UL 9540 / NFPA 855) code adoption for Colorado, with primary sources.
Is UL 858 required in Colorado?
Yes — effectively. Colorado requires fixed household appliances to be listed by a Nationally Recognized Testing Laboratory (NRTL), and UL 858 is the de-facto listing standard a household electric range must meet.
Are NRTL-listed (UL / ETL / CSA) appliances required in Colorado?
Yes. Colorado's adopted code requires fixed electrical appliances to be listed by an NRTL (UL, ETL/Intertek, CSA, etc.) — NEC 110.3.
Which edition of the NEC does Colorado use?
Colorado has adopted the 2023 edition of the National Electrical Code (NEC). State Electrical Board adopts the most recent NEC.
Which fire code does Colorado enforce?
Colorado enforces other.
Code adoption summary
| NEC edition | 2023 NEC |
|---|---|
| Appliance listing (UL 858) | Effectively required |
| NRTL listing requirement | Required |
| Fire code | other |
Sources
- NFPA — NEC enforcement maps
- Colorado Sun — Plug-in solar bill awaits Polis signature
- HB26-1007 — Colorado General Assembly
Data is illustrative. Verify any compliance decision against the cited primary sources and the NFPA NEC enforcement maps before relying on it.