Local authority · Mississippi
Hattiesburg — energy & appliance code adoption
Yes — effectively. Mississippi has no statewide electrical code. Hattiesburg's ordinance-adopted 2017 NEC is the operative authority within city limits. Below: how Hattiesburg differs from Mississippi on appliance listing, NEC, fire code, and energy storage, with sources.
Is UL 858 required in Hattiesburg?
Yes — effectively. Hattiesburg 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. UL858 is the recognized NRTL standard for household electric cooking appliances.
Are NRTL-listed (UL / ETL / CSA) appliances required in Hattiesburg?
Yes. Hattiesburg's adopted code requires fixed electrical appliances to be listed by an NRTL (UL, ETL/Intertek, CSA, etc.) — Hattiesburg Code Ch. 9 / NEC 110.3(B). NRTL listing required; installed per the listing.
Which edition of the NEC does Hattiesburg use?
Hattiesburg has adopted the 2017 edition of the National Electrical Code (NEC). Adopted by ordinance (File 2019-336) alongside the 2018 ICC family. Local amendments codified in Hattiesburg Code Ch. 9 Art. II.
Is UL 9540 required for residential energy storage in Hattiesburg?
Yes. Hattiesburg's adopted code requires UL 9540 listing for stationary energy storage systems (ESS) in dwellings. 2018 IFC §1207 governs ESS; UL 9540 listing required, 9540A propagation test for >20 kWh or reduced separation.
Is UL 9540A fire-propagation testing required in Hattiesburg?
Yes — effectively. Hattiesburg requires NRTL listing for energy storage systems, and UL 9540A is the controlling standard.
What is the residential energy-storage capacity limit in Hattiesburg?
Hattiesburg limits residential energy storage to 20 kWh per dwelling unit.
Which fire code does Hattiesburg enforce?
Hattiesburg enforces IFC 2018. Enforced by Hattiesburg Fire Department.
Code adoption summary
| NEC edition | 2017 NEC |
|---|---|
| Appliance listing (UL 858) | Effectively required |
| NRTL listing requirement | Required |
| Fire code | IFC 2018 |
| IRC edition | 2018 IRC |
| UL 9540 (residential ESS) | Required |
| UL 9540A propagation test | Effectively required |
| Residential ESS cap | 20 kWh / dwelling |
| NFPA 855 edition | 2017 |
Sources
- City of Hattiesburg — Code Adoption Ordinance (File 2019-336)
- Hattiesburg Ch. 9 Art. II Electrical Code Amendments (PDF)