U.S. code adoption
Texas — 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 Texas, with primary sources.
Is UL 858 required in Texas?
Yes — effectively. Texas 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 Texas?
Yes. Texas'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 Texas use?
Texas has adopted the 2020 edition of the National Electrical Code (NEC). Texas Department of Licensing and Regulation adopts NEC for licensed electrician work; municipalities may adopt newer editions.
Is UL 9540 required for residential energy storage in Texas?
Yes — effectively. Texas 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 Texas?
Yes — effectively. Texas requires NRTL listing for energy storage systems, and UL 9540A is the controlling standard.
What is the residential energy-storage capacity limit in Texas?
Texas limits residential energy storage to 20 kWh per dwelling unit.
Which fire code does Texas enforce?
Texas enforces IFC.
Code adoption summary
| NEC edition | 2020 NEC |
|---|---|
| Appliance listing (UL 858) | Effectively required |
| NRTL listing requirement | Required |
| Fire code | IFC |
| IRC edition | 2015 IRC |
| UL 9540 (residential ESS) | Effectively required |
| UL 9540A propagation test | Effectively required |
| Residential ESS cap | 20 kWh / dwelling |
| NFPA 855 edition | 2017 |
Local authorities in Texas
Sources