cpc

Hello, I am going to make a small modification to my new build electrics. In the downstairs hallway I have a 2-gang switch. Gang 1 controls outdoor light, gang 2 controls upstairs and downstairs light (further two switches upstairs do same). Neutrals are at the switch. Downstairs pendant is...

Table 54.7 in BS7671 says that when the protective conductor is the same material as the line conductor (S), it must at least be the same size as the line conductor. Why does 1.5mm² T&E not comply with this reg when you have 1.5mm² line conductors and 1mm² protective/CPC conductor!? Can some...

Under Regulation 411.3.1.1 (Page 55 of the 17th edition of BS7671 Amendment 3), as quoted; It is clear that that a CPC must be included in all fixed wiring except for Class 2 lamp holders, even if it is a Class 2 device at the other end. Yet people still use the "earth" core in flex as a live...

Just a quick post that some on here may find amusing. The other day I replaced the non-dimmable LED light bulbs in the living room and downstairs hallway with dimmable counterparts as they can be used with automated Z-Wave switches what don't require a neutral connection. (Hallway and Living...

Putting aside the fact that Supplementary Equipotential Bonding is often not needed these days in accordance with the 17th edition providing that all circuits in the bathroom are protected by a 30ma RCD, all incoming services are mains bonded back to the MET, and that all circuits meet the...

So the front room of my house had all the plaster ripped off a few months back due to damp problems :rolleyes: and is due to be re-plastered next year. :) Well today I went to remove the wire terminating at a junction box from the only socket in the room and discovered the CPC of the cable was...