Check for proper IP/NEMA ratings and material quality. Ensure safe placement: install in dry, accessible areas with good ventilation and at appropriate height (typically ~1. Practice good wiring: secure grounding, neat cable management, proper insulation, and correct wire. Whether you are an electrical contractor or a construction brigade, knowing how to properly and safely install distribution boxes is the basis of ensuring the safe operation of the entire system. more Welcome to our channel! In this video. Phase 3's Powersafe Sequential Mating Box controls the connection sequence of incoming / outgoing high current cable connections. With key (included) turn the Earth lock clockwise.