We have just moved onto a brand new house built by a large building
company, I installed some security lighting around the garage at the
weekend, went to turn off the Garage supply to make the final
connections, checked the Consumer unit, no mcb for the garage, checked
the room where the supply enters the house, no switch there either.
Found I had to turn off the ground floor sockets to isolate the
Now I have been out of sparkying for about 6 years, so am a little
rusty on regs now (trained on 15th ed).
As far as I can make out the supply is spured off a socket in the
Utility room (socket placed about 6 inches left of the sink), this
goes to an outside platic box, converts to swa, at the garage, swa -
plastic box - back to t+e to fused spur for the light and then double
Am I right in thinking the following is wrong
1. Socket too close to sink for one, there is a better position
2. Spuring off the socket with no local isolation for the garage
3. Isn't there something about equipitential zones when the remote
building is not connected to the house.
I was thinking if there is a problem in the garage or with swa cable,
the RCD would trip taking out the whole of the house sockets, no doubt
the little platic boxes will be full with water in no time. The
missus is bound to be on her own when this happens....
In time I'll proably rip the whole lot out and take a supply direct
from the consumer unit on its own rcd. Oh by the way the consumer
unit is only 2m from the socket the supply is spured from
And to think some of the houses that do not have garage supplies as
standard, they charge £375 for this :)