Unfused spur.

davezawadi (David Stone):

As the circuit is protected against overload of 13A, is RCD protected, and presumably is at a point where a short circuit disconnection time is less than 400ms, why not Z. The adiabatic for the 1.5 conductors is presumably satisfied (I would be very surprised if not, and the Earth fault is protected by the RCD) then why not. It isn't in the OSG, but no immediate problems seem to be present.


Strange things are happening with my edit! Are you carrying out an EICR Z, or have you run out of 2.5? 

No, I have plenty of 2.5 thanks. I used experience and electrical engineering principles. I knew that the single socket would not normally use more than 13 Amps. The 1.5mm2 supply cable is rated at 20 Amps., probably more as the wall is cool. (North facing by the sea). Also the cable was easy to add to an existing double 13 Amp socket on a ring. Then I discovered the Reg. today that says: "Accessories to B.S. 1363 may be supplied through a final ring with or without unfused spurs...........Such circuits are deemed to meet the requirements of Reg.433.1.1 if the current carrying capacity (Iz) of the cable is not less than 20 A and if under the intended conditions of use, the load current in any part of the circuit is unlikely to exceed for long periods the current-carrying capacity (Iz) of the cable.


Z.

davezawadi (David Stone):

As the circuit is protected against overload of 13A, is RCD protected, and presumably is at a point where a short circuit disconnection time is less than 400ms, why not Z. The adiabatic for the 1.5 conductors is presumably satisfied (I would be very surprised if not, and the Earth fault is protected by the RCD) then why not. It isn't in the OSG, but no immediate problems seem to be present.


Strange things are happening with my edit! Are you carrying out an EICR Z, or have you run out of 2.5? 

No, I have plenty of 2.5 thanks. I used experience and electrical engineering principles. I knew that the single socket would not normally use more than 13 Amps. The 1.5mm2 supply cable is rated at 20 Amps., probably more as the wall is cool. (North facing by the sea). Also the cable was easy to add to an existing double 13 Amp socket on a ring. Then I discovered the Reg. today that says: "Accessories to B.S. 1363 may be supplied through a final ring with or without unfused spurs...........Such circuits are deemed to meet the requirements of Reg.433.1.1 if the current carrying capacity (Iz) of the cable is not less than 20 A and if under the intended conditions of use, the load current in any part of the circuit is unlikely to exceed for long periods the current-carrying capacity (Iz) of the cable.


Z.