1. Izintambo zebhokisi lokusabalalisa elingaqhumi elingu-380V kufanele zisebenzise amandla ezigaba ezintathu angu-380V, hhayi izigaba ezintathu 220V, ngenxa yokungabikho kwentambo engathathi hlangothi.
2. I-circuit breaker ngayinye ephumayo ingakhiqiza kuphela i-voltage engu-380V phakathi kwanoma yiziphi izigaba ezimbili.
3. Ngezidingo ze-220V, kufanele kusetshenziswe ikhebula elingumgogodla omane, ehlanganisa umugqa ongathathi hlangothi (N), kuhlelwe ngokuqondile ukuxhuma umugqa ongu-N.
4. Ukuze kuthotshelwe ukuphepha, ikhebula elinezingqikithi ezinhlanu ezinomqhubi ovikelayo (Ocingweni) kufanele isetshenziswe, exhunywe endaweni ebiyelwe.
5. Uma kukhona izisetshenziswa zikagesi ezimbili ezingama-380V ezansi nomfula (isib., abashiseli abathile), xhuma noma yiziphi izigaba ezimbili ku-circuit breaker, ukushiya isigaba sesithathu singenawo owamanje.