Hi
So recently moved into new house (early 1990's build). I'm wanting to fit an extra socket to my garage (integrated). Having looked at the wiring in the garage, it's fed off a spur from the ring main in the lounge through the wall.
So the spur goes to a single unfused socket. That then feeds a light switch via a 13A JB to feed 3 independent lights, including security light.
It also feeds the backup immersion heater (which we never use - only if the boiler breaks) unfused, and then feeds the boiler and controls via another 13A JB. A schematic is as below: -
So a couple of questions: -
Basically: -
Obviously I only have 13A in total to play with, so if the boiler's broken and the immersion heater is on, I won't be able to use anything high powered from the sockets without blowing the fuse.
So recently moved into new house (early 1990's build). I'm wanting to fit an extra socket to my garage (integrated). Having looked at the wiring in the garage, it's fed off a spur from the ring main in the lounge through the wall.
So the spur goes to a single unfused socket. That then feeds a light switch via a 13A JB to feed 3 independent lights, including security light.
It also feeds the backup immersion heater (which we never use - only if the boiler breaks) unfused, and then feeds the boiler and controls via another 13A JB. A schematic is as below: -
So a couple of questions: -
- My understanding was that to feed more than one socket or appliance off a ring main spur, it must be connected via a 13A JB to protect the initial spur wire. In the above configuration, the single socket and the immersion heater are unfused - is this therefore currently against code?
- I have read conflicting information about whether an immersion heater should be on a separate circuit or fed from a ring. My understanding is that it's probably OK (notwithstanding the above), but dedicated feed is preferred for isolation purposes?
- I assume there's nothing wrong with the lighting side of things?
Basically: -
- Swap the single switch and fused JB to protect the spur (would actually replace fused JB with a switched, fused JB)
- Fit a single socket via a JB on the feed to the immersion heater/boiler.
Obviously I only have 13A in total to play with, so if the boiler's broken and the immersion heater is on, I won't be able to use anything high powered from the sockets without blowing the fuse.