U.S. code adoption
District of Columbia — 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 District of Columbia, with primary sources.
Is UL 858 required in District of Columbia?
Yes — effectively. District of Columbia 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. NEC 2014 still requires listing per 110.3 / 422.6, so UL858 (or equivalent NRTL listing) is effectively required.
Are NRTL-listed (UL / ETL / CSA) appliances required in District of Columbia?
Yes. District of Columbia'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 District of Columbia use?
District of Columbia has adopted the 2014 edition of the National Electrical Code (NEC), effective 2020-05-29. 2017 DC Construction Codes (effective 2020-05-29) reference the 2014 NEC. DC has lagged several editions behind the current NEC.
Is UL 9540 required for residential energy storage in District of Columbia?
Yes — effectively. District of Columbia 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 District of Columbia?
Yes — effectively. District of Columbia requires NRTL listing for energy storage systems, and UL 9540A is the controlling standard.
What is the residential energy-storage capacity limit in District of Columbia?
District of Columbia limits residential energy storage to 20 kWh per dwelling unit.
Which fire code does District of Columbia enforce?
District of Columbia enforces IFC 2015. 2017 DC Fire Code based on IFC 2015 with DC amendments.
Code adoption summary
| NEC edition | 2014 NEC |
|---|---|
| Appliance listing (UL 858) | Effectively required |
| NRTL listing requirement | Required |
| Fire code | IFC 2015 |
| 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 |
Sources