U.S. code adoption
Ohio — 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 Ohio, with primary sources.
Is UL 858 required in Ohio?
Yes — effectively. Ohio 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 Ohio?
Yes. Ohio'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 Ohio use?
Ohio has adopted the 2017 edition of the National Electrical Code (NEC). Residential Code of Ohio (RCO 2019, OAC 4101:8) references NEC 2017; BBS has been reviewing newer editions but the 2017 NEC remains the controlling residential edition.
Is UL 9540 required for residential energy storage in Ohio?
Yes — effectively. Ohio 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 Ohio?
Yes — effectively. Ohio requires NRTL listing for energy storage systems, and UL 9540A is the controlling standard.
What is the residential energy-storage capacity limit in Ohio?
Ohio limits residential energy storage to 20 kWh per dwelling unit.
Which fire code does Ohio enforce?
Ohio enforces IFC. Ohio Fire Code adopted by the State Fire Marshal.
Code adoption summary
| NEC edition | 2017 NEC |
|---|---|
| Appliance listing (UL 858) | Effectively required |
| NRTL listing requirement | Required |
| Fire code | IFC |
| 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
- Ohio Administrative Code 4101:8 — Residential Code of Ohio
- Ohio HB 358 (135th GA)