Local authority · Missouri
St. Louis — energy & appliance code adoption
Yes — effectively. Missouri has no statewide residential code. As an independent city, St. Louis's Revised Code is the operative authority within city limits. Below: how St. Louis differs from Missouri on appliance listing, NEC, fire code, and energy storage, with sources.
Is UL 858 required in St. Louis?
Yes — effectively. St. Louis 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 St. Louis?
Yes. St. Louis's adopted code requires fixed electrical appliances to be listed by an NRTL (UL, ETL/Intertek, CSA, etc.) — St. Louis Revised Code Title 25 / NEC 110.3(B). Listed and labeled equipment required.
Which edition of the NEC does St. Louis use?
St. Louis has adopted the 2020 edition of the National Electrical Code (NEC). St. Louis Revised Code Title 25 adopts the 2020 NEC with local amendments; enforced by the Building Division.
Is UL 9540 required for residential energy storage in St. Louis?
Yes — effectively. St. Louis requires NRTL listing for stationary energy storage systems (ESS) in dwellings, and UL 9540 is the controlling standard. STLFD plan review for ESS > 20 kWh aggregate; IRC Appendix AW not adopted; UL 9540A required to exceed 20 kWh per IFC §1207.11.4.
Is UL 9540A fire-propagation testing required in St. Louis?
Yes — effectively. St. Louis requires NRTL listing for energy storage systems, and UL 9540A is the controlling standard.
What is the residential energy-storage capacity limit in St. Louis?
St. Louis limits residential energy storage to 20 kWh per dwelling unit.
Which fire code does St. Louis enforce?
St. Louis enforces IFC 2018. Enforced under Title 22.
Code adoption summary
| NEC edition | 2020 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