Maryland sits inside PJM Interconnection, the largest wholesale grid operator in North America, and the state is served by BGE, Pepco, Delmarva Power, Potomac Edison, SMECO, and the Choptank Electric Cooperative on the Eastern Shore. The available fault current at any facility service is set by the serving utility and can shift when that utility upgrades transformers, ties, or substations, which is why short-circuit and arc flash studies should be revisited after any utility-side work.
Maryland operates an OSHA-approved state plan: MOSH (Maryland Occupational Safety and Health), administered by the Maryland Department of Labor, covers both private-sector and state/local government employers. MOSH enforces electrical safety under 29 CFR 1910 Subpart S and treats NFPA 70E as the consensus standard for arc flash risk assessment and equipment labeling. A current, PE-sealed arc flash study is the documentation a MOSH compliance officer or an insurance auditor expects to see.
The authority having jurisdiction for the installation itself is typically the local or county electrical inspection office enforcing the National Electrical Code as adopted in Maryland. Every study True Power Systems delivers in the state is modeled to current IEEE and NFPA methodology and sealed by a Professional Engineer licensed in Maryland.