1. ʻOku totonu ke fakaʻaongaʻi ʻe he fakauaea ki ha puha tufakiʻanga naunau 380V ʻa e konga ʻe tolu 380V, ʻikai konga tolu 220V, koeʻuhi ko e ʻikai ke ʻi ai ha uaea ʻoku ʻikai ke ʻi ai ha uaea.
2. ʻE toki lava pe ʻe he breaker takitaha ʻo ʻomi ha 380V voltage ʻi he vahaʻa ʻo ha ongo konga.
3. Ki he ngaahi fie maʻu 220V, ʻoku totonu ke fakaʻaongaʻi ha keipolo tefitoʻi keipolo ʻe fa, 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.