I'm in the UK, very old flat, I want to add an SFCU spur (to be on the safe side) for an electric oven. I have two practical questions regarding the double socket wiring in the picture.
- How come there is one pair of black & red coming from one conduit and two pair of black & red from the other?
First off, I don't see any nearby spur so shouldn't there be just two blacks and two reds (and two bares)? So where is the earth? The green seems to be just a short wire to the case.
- I hope my nightmare won't come true and you don't tell me I must not spur off this socket. Then given we work out the connections, how would I stuff a fourth cable under a single screw, i mean I can try but isn't that a really bad practice? Would buying a modern socket make it easier?