Factory-wired for efficient installations and include terminal blocks, on/off selector switches, power ON pilot light, and a 24V or 120V control circuit. Panels are available for use in 208V, 240V, 277V, 480V and 600V systems, with amp loads up to 40, 50, 100, 200 and 300 amps. NEMA 1 enclosure, UL/cUL listed and labeled control panel. Control transformer with fused primary and secondary.