U.S. code adoption
Maryland — 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 Maryland, with primary sources.
Is UL 858 required in Maryland?
Yes — effectively. Maryland 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 Maryland?
Yes. Maryland'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 Maryland use?
Maryland has adopted the 2023 edition of the National Electrical Code (NEC).
Which fire code does Maryland enforce?
Maryland enforces other.
Code adoption summary
| NEC edition | 2023 NEC |
|---|---|
| Appliance listing (UL 858) | Effectively required |
| NRTL listing requirement | Required |
| Fire code | other |
Sources
Data is illustrative. Verify any compliance decision against the cited primary sources and the NFPA NEC enforcement maps before relying on it.