U.S. code adoption
Oklahoma — 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 Oklahoma, with primary sources.
Is UL 858 required in Oklahoma?
Yes — effectively. Oklahoma 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 Oklahoma?
Yes. Oklahoma'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 Oklahoma use?
Oklahoma has adopted the 2023 edition of the National Electrical Code (NEC), effective 2024-09-14. Oklahoma Uniform Building Code Commission adopts NEC as the statewide minimum; 2023 NEC effective Sep 14 2024.
Is UL 9540 required for residential energy storage in Oklahoma?
Yes — effectively. Oklahoma requires NRTL listing for stationary energy storage systems (ESS) in dwellings, and UL 9540 is the controlling standard. ESS in residential dwellings governed by IFC §1207, referencing UL 9540 listing and NFPA 855 installation standard. UL 9540A required to exceed the default 20 kWh / dwelling cap or reduce default 3-ft separation.
Is UL 9540A fire-propagation testing required in Oklahoma?
Yes — effectively. Oklahoma requires NRTL listing for energy storage systems, and UL 9540A is the controlling standard.
What is the residential energy-storage capacity limit in Oklahoma?
Oklahoma limits residential energy storage to 20 kWh per dwelling unit.
Which fire code does Oklahoma enforce?
Oklahoma enforces IFC 2018.
Code adoption summary
| NEC edition | 2023 NEC |
|---|---|
| Appliance listing (UL 858) | Effectively required |
| NRTL listing requirement | Required |
| Fire code | IFC 2018 |
| IRC edition | 2018 IRC |
| UL 9540 (residential ESS) | Effectively required |
| UL 9540A propagation test | Effectively required |
| Residential ESS cap | 20 kWh / dwelling |
| NFPA 855 edition | 2017 |
Sources
- NFPA — NEC enforcement maps
- Oklahoma Uniform Building Code Commission — Codes & Rules
- OUBCC — National Electrical Code Adoptions
- Canary Media — Balcony solar in state legislatures