County of St. Mary's (MD)

Maryland Authority Having Jurisdiction Solar permitting requirements

NEC Code Version2023

Fire Code Version2018 Building Code

SolarAPP+ StatusTargeted

Wet Stamps RequiredDigital Structural

Fire Setback Enforced1

Codes

NEC Code Version: 2023

Fire Code Version: 2018 Building Code

Code List

2021 INTERNATIONAL RESIDENTIAL CODE

2021 INTERNATIONAL BUILDING CODE

2021 INTERNATIONAL ENERGY CONSERVATION CODE

2021 INTERNATIONAL EXISTING BUILDING CODE

2023 NATIONAL ELECTRICAL CODE

2021 MARYLAND STATE PLUMBING CODE

2021 INTERNATIONAL PLUMBING CODE

2021 INTERNATIONAL FUEL GAS CODE

2021 LIQUEFIED PETROLEUM GAS CODE

2017 NFPA 58 MARYLAND STATE HVACR CODE

2021 INTERNATIONAL MECHANICAL CODE

2018 MARYLAND STATE FIRE CODE

2021 MARYLAND ACCESSIBILITY CODE NFPA 1 AND 101

ASCE Code Specification: ASCE 7-16

SolarAPP+ & submittal

SolarAPP+ Status: Targeted

Any SolarAPP+ Restrictions: 1

SolarAPP+ Restrictions: MPU,Derate

How Many Plansets Required: 3

Revision Required: 0

New Planset Required For Module Swap: 0

Stamps

Ee Stamp Required On SLD: No

Wet Stamps Required: Digital Structural

Structural Calculations Required: Yes

Stamp Location On Plans: Unspecified

Date On Stamps: Expiration Date

Fire setbacks

Fire Setback Enforced: 1

Setback Notes: Standard

Structural & loads

Wind Speed: 115

Wind Notes: Exposure Category B

Snow Load: 25

Reducible Snow Load Allowed: 1

Max Attachment Spacing: 96

Structural Notes: Standard

Minimum Ground On Roof: #8

Electrical

Electrical Load Calcs Required: Derates

Allowed POI: Load Side Taps,Line Side Taps,Meter Adapter,PV Breaker

Panel Schedule Required: Partial Home Backup

Temperature Rating: 90

De Rating Ampacity: 0.91

BOS Restrictions: If a lineside tap this AHJ requires a fused disconnect inside the home and a non fused outside with the system. If there is to be a fused disco inside, use a flush-mounted breaker housing instead of a surface-mounted knife-blade switch. Former is aesthetically pleasing. Latter is not.

Battery / ESS

Unique Battery Placards Needed: 0

ESS Notes: Standard

Separate ESS Disconnect Required: ESS Disconnect

ESS Elevation Detail Required: No

Plan set

Plan Set Requirements: This AHJ allows a single fused disconnect on exterior of home, if within 10' of interconnection per 2020 NEC. If exterior service disconnect present on site: always TAP the exterior disconnect, only exterior disconnect needed in this case ALWAYS refer to IRC 2018 324.6 fire code setbacks off-sets always required in St Mary's County This AHJ will always require a POST INSTALL STRUCTURAL LETTER, STAMPED BY ENGINEER If there is to be a fused disco inside, use a flush-mounted breaker housing instead of a surface-mounted knife-blade switch. Former is aesthetically pleasing. Latter is not. Please review for a frayed service cable if so we will need to get it replaced before install to pass county inspection If a lineside tap this AHJ requires a fused disconnect inside the home and a non fused outside with the system

Ground mount

Ground Mount Fencing Required: Mesh/Scrim