Article 250-Grounding and Bonding Article 312-Cabinets, Cutout Boxes, and Meter Socket Enclosures Article 314- Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and Handhold Enclosures Article 350-Liquidtight Flexible Metal Conduit: Type LFMC Article 404-Switches Article 410-Lumina
It goes up. It goes down. Sometimes, it is thought to be infinite (although it isn’t), and other times, it seems impossible to find. The available short-circuit current from the electric utility is one of the more important pieces of information for an arc flash hazard calculation study.