U.S. code adoption
Arizona — energy & appliance code adoption
Not yet determined for Arizona. This page summarizes electrical (NEC), appliance-listing (UL 858), fire-code, and energy-storage (UL 9540 / NFPA 855) code adoption for Arizona, with primary sources.
Is UL 858 required in Arizona?
Not yet determined for Arizona. Most populated jurisdictions adopt NEC locally; rural unincorporated areas may have minimal enforcement.
Are NRTL-listed (UL / ETL / CSA) appliances required in Arizona?
Arizona has no statewide electrical code, so listing requirements are set by local AHJs. Arizona does not adopt a statewide electrical code. Cities and counties adopt their own; Phoenix and Tucson are on recent NEC editions.
Which edition of the NEC does Arizona use?
Arizona has no statewide NEC adoption; the applicable edition of the National Electrical Code is set by local authorities having jurisdiction (AHJs).
Is UL 9540 required for residential energy storage in Arizona?
Not yet determined for Arizona. Arizona has no statewide fire / building code. Cities (Phoenix, Tucson, Mesa) adopt the IFC independently; the AZ State Fire Marshal handles only state-occupied buildings.
Is UL 9540A fire-propagation testing required in Arizona?
Not yet determined for Arizona.
What is the residential energy-storage capacity limit in Arizona?
Arizona has no jurisdiction-specific residential energy-storage capacity cap beyond the model-code default (typically 20 kWh per dwelling unit under IFC §1207 / NFPA 855).
Which fire code does Arizona enforce?
Arizona enforces other.
Code adoption summary
| NEC edition | No statewide adoption |
|---|---|
| Appliance listing (UL 858) | Unknown |
| NRTL listing requirement | No statewide code |
| Fire code | other |
| UL 9540 (residential ESS) | Unknown |
| UL 9540A propagation test | Unknown |
| Residential ESS cap | Model-code default |
Local authorities in Arizona
Sources