On Sat, 26 Jul 2003 21:39:16 +0100, "Jaime"
wrote:

The Regs allow you to apply diversity in a situation such as this, in
the specific case of a domestic electric cooker, you take the first 10A
of the total load, then add 30% of the remainder, plus another 5A if the
control unit contains a 13A socket. So, if the total load of the cooker
is 67A, then the circuit needs to be rated 10A + (0.3 * 57)A = 27.1A. so
a 32A MCB will be fine (at a pinch even if there is a socket in the
control unit) and in most normal circumstances 6mm^2 cable will also be
fine. The reason for this is that each heating element will have its own
thermostat, all of which will cycle 'out of sync' so the full load in
practice is unlikely to be drawn for anything other than a very short
time.

Thanks very much thats exactly the information I was looking for.

Just to be clear - the diversity calculations are different if the
premises are non-domestic (e.g. a guest house, hotel or commercial
premises).

I'm only pointing that out in case someone listens in to this thread
and makes the wrong calculation.

Andrew

Do you need a handyman service? Check out our
web site at http://www.handymac.co.uk