These boxes use either 120/240 VAC single-phase or 120/208 or 277/480 VAC three-phase power sources. They can power everything from small tools to heavy-duty industrial equipment, based on the model's specifications. Temporary Power Box, U-Ground T-Slot, NEMA 3R, (6) 20 Amp Circuit Breaker Protected Outlets, Circuit Breaker Protected 30 Amp 250V Receptacle, 50 Amp Inlet and Outlet Recessed for Safety Category: Temporary Power Distribution Boxes Power Distribution Box, NEMA 3R Enclosure, Sled Base. Includes: (1). Our power distribution boxes range from 20-800 Amps and are well known for being durable, long lasting and safe. All outlets have circuit breaker overload protection and all U-Ground outlets are GFCI protected. This o ersthe highest levels of electrical safety. Multiple 15/20A outlets, and 30A and 50A Twistlocks provide the most popular power outlets that. Allow for Increased Efficiency, average rating value is 4 of 5. Outlets: 1- 50A CS6369 125/250V, 1- 30A 250V L6-30R, 6- 20A 5-20R 125V GFCI. Designed for open neutral and reverse phasing protection. Used with various power supply adapters, these units are ideal for smaller jobs and restoration work where the only available power is from range outlets, dryer out.