We're having a loft conversion done and the electrician that tiurned up
today, said that he'd just run the sockets & lighting off the existing
1st floor stuff... ANd not run a new line from the consumer unit on
Is that OK? Isn't there a 50m^2 floor area limit on sockets with a
single circut breaker (Ring main, not star wired). The loft plus 1st
floor would be close to 100m^2 together...
The limit for a ring is 100m^2... Having said that I thing I would
prefer to run a new circuit for both. Do you have enough spare ways on
your CU? It may be there were insufficient and he was avoiding the cost
of a new CU.
The limit is 100m2. I'd not be worried myself, unless there are large fixed
appliances. You'll probably never use even a fraction of a ring's capacity
on a 1st floor/loft conversion shared circuit. In a modern centrally heated
house, it's only really the kitchen and electric showers that use large
amounts of electricity.
The worst case is that your central heating fails and you try to run more
than 4 2kW fan heaters. Even then, it would probably be OK if they had
| "Hamie!" wrote:
| >We're having a loft conversion done and the electrician that tiurned
| >up today, said that he'd just run the sockets & lighting off the
| >existing 1st floor stuff... ANd not run a new line from the
| >consumer unit on separate circuts.
| For a 32A ring main the maximum floor area is 100m2
I'd be more concerned about the lighting circuit as that may already be
approaching maximum (theoretical, each point 100W) capacity especially if
there are lots of bedhead lights and bathroom fans wired in.
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