1. ʻOku fakaʻaongaʻi ʻa e ngaahi puha tufakiʻanga naunau ki he ngaahi meʻa fakamisini ʻi he ngaahi meʻa fakaʻuhila ki he branching mo e ʻea ʻo e nofoʻanga. ʻOku faʻa ngaohi ʻa e ngaahi puha ko ʻeni ʻaki ʻa e ukamea, mo e ngaahi penolo ʻi muʻa ʻoku maʻu ʻi he pelesitiki mo e ukamea fakatouʻosi. ʻOku nau maʻu ha kiʻi, hinged takafi ke faingofua hono maʻu.
2. ʻOku makatuʻunga ʻa e ngaahi fakaikiiki ʻo e ngaahi puha tufakiʻanga naunau ʻi he lahi ʻo e circuits ʻoku nau fale. ʻE lava ke hao ʻa e fanga kiʻi puha iiki ange ʻi ha circuits ʻe fa ki he nima, Neongo ʻe lava ʻe he ngaahi meʻa lalahi ange ʻo matuʻuaki ha toko ono pe lahi ange. ʻE lava pe ke ʻikai puli ʻa e kiʻi takafi siʻisiʻi pe ko ha meʻa ʻoku ʻikai ke.
3. Kimuʻa pea fili ha ngaahi meʻa fakapisinisi puha tufakiʻanga naunau ki he fakaʻauha, ʻoku mahuʻinga ke palani ʻa e tufakiʻanga ʻuhila. ʻOku kau ʻi he palani ko ʻeni ʻa hono fakapapauʻi ʻo e lahi ʻo e ʻea pea tatau ai pe pe ʻoku nau tautaha pe tuʻo ua. ʻOku totonu ke ʻi ai ha feituʻu feʻunga ʻi loto ʻi he puha tufakiʻanga naunau kuo fili, fakaʻatā ke tānaki atu ki he ngaahi sēketi ʻi he kahaʻú.