| 摘要 |
The invention comprises an electrical distribution system in which the electrical conductors are enclosed within a length of hollow conduit which is formed with a continuous slot in one wall through which a plug can be inserted and rotated to bring its contact pins into contact with the conductors. Gate means located within the conduit have a normally closed position in which the conductors are closed off from that part of the conduit containing the slot, and these are movable into the open position by entry of the plug through the slot. By closing off the conductors from the remainder of the conduit, accidental contact with the conductors is prevented even though access to the interior of the conduit may be achieved via the slot. In one embodiment of the invention, a keyway is provided in the conduit and the plug is formed with a corresponding projection which engages the keyway when the plug is fitted into the slot. The gate means is arranged such that it can only be opened by an element passing through the keyway, thus providing an additional safety feature. |
