問題文
A shop wants access points in a high ceiling where there is no mains outlet and no budget for an electrician. Which pair states what the powered cable carries and what the central switch does?
選択肢
- The ceiling above the shop floor has no mains socket nearby, so the powered cable carries both feeds apart and the central switch feeds them from one connector in that installation.
- The ceiling above the shop floor has no mains socket nearby, so the powered cable carries both feeds apart and the central switch feeds them from one point in that installation.
- The ceiling above the shop floor has no mains socket nearby, so the powered cable carries both feeds together and the central switch feeds them from one connector in that installation.
- The ceiling above the shop floor has no mains socket nearby, so the powered cable carries both feeds together and the central switch feeds them from one point in that installation.