The document discusses building explosion proof equipment racks that include NEMA 4/4X and NEMA 7/9 classified enclosures. The racks provide motor control and distribution assemblies in one complete package and can include power bussing, light panels, welding receptacles, motor starters, drives, soft starters, PLCs, and instrumentation. The racks are designed and manufactured under strict quality guidelines to meet custom specifications and are fully wired to accept field power and load connections.