In message om,
"Dave Liquorice" wrote:

On Sat, 28 Feb 2004 17:13:21 +0000, chris French wrote:

All those sockets should be on a 32A ring.

They might be better, but not a case of 'should' really. Assuming
they come within the floor area recommendations (20 Sqm?)

I used "should" not "must"... If only because people expect sockets to
be on a 32A ring these days and thus expect to be able to load that
ring up to 7+kW... And if it is 20sqM then thats just about a single
room or do you mean a space 20m x 20m = 400m^2?


A radial in 2.5mm2 protected by a 20A breaker can serve up to 50m2 (50
square meters, i.e. about half the floor area of a four bed semi) with
as many sockets as you like, and whatever topology ("spurs on spurs")
takes your fancy. See the On Site Guide table 8A (p151).

If you want a 32A circuit it either has to be a radial as above, but
wired in 4mm2 cable, or a ring circuit wired in 2.5mm2. A 32A/4mm2
radial can serve 75sqm, a 32A/2.5mm2 ring 100sqm.

HTH

Hwyl!

M.

--
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