1. Wiring for a 380V explosion-proof distribution box should utilize three-phase 380V power, not three-phase 220V, due to the absence of a neutral wire.
2. Each outgoing circuit breaker can only produce a 380V voltage between any two phases.
3. For 220V requirements, a four-core cable should be employed, incorporating a neutral line (N), specifically arranged to connect the N line.
4. For safety compliance, a five-core cable with a protective conductor (Pe wire) should be used, connected to the enclosure.
5. If there are two 380V electrical devices downstream (e.g., certain welders), connect any two phases in the circuit breaker, leaving the third phase without current.
