The specifications for the Mini X-Treme Box indicate that it uses a 125/250V 30A L14-30P twist-to-lock inlet. This type of inlet is typically used for single-phase power, not three-phase power. 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. Includes 6 125V 20A NEMA 5-20R or L5-20R receptacles with individual circuit breakers and GFCI protection, as well as 125/250V receptacles (No power cord included). Power distribution box is designed for use in wet or rainy conditions, and its rainproof durability is safe and reliable. Applications include construction sites, entertainment industry, fairs. 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 Temporary Power Box, U-Ground T-Slot, NEMA 3R, (6) 20 Amp Circuit Breaker Protected Outlets, Circuit Breaker. Temporary power distribution boxes and carts serve as hubs to connect electrical loads and have multiple outlets to distribute power. Common applications include construction, outdoor. Voltec's t-box is made with the highest quality components to withstand rugged environments and exposure.