10 PACK BT PABX Telephone Extension Socket IDC Secondary Line Wall Plate 1/3A

Single BT or PABX Wall Extension Socket (Mini)Colour coded screw terminals & instructions for easy installation. Extension socket size is 58mm x 58mm x 29mm and comes with its own back box. PLEASE NOTE - This listing is for 10x wall plates, multiple views may be shown in the picture above.Used for - This BT extension socket should be connected to either a master socket or another extension socket, it cannot be used as a master socket (a master socket connects to the main cable entering a property from a telephone operator). The box can screwed to a skirting board or wall. How to fit - A cable should be run from the master socket or another extension socket to this socket. On the newer NTE5A master sockets there is a removable front panel where there is 3 IDC terminals, a cable can be attached using an IDC tool. The extension socket should be wired to the master socket in the following format; terminal 2 to 2, 3 to 3 and 5 to 5. If you have an older master socket, the wiring is still th