22 Feb
2007
22 Feb
'07
1:04 a.m.
Hi,
Chuck Guzis said:
I have a slightly OT question about the UK RCDs.
[Snip]
But here's my question: Given that the RCD is
installed as part of
the main breaker, surely some allowance must be made for small
amounts of leakage from a number of powered devices. So how large
must the leakage current to earth/ground be before the breaker trips?
RCDs work by measuring the current in both mains wires, this, of course
should the the same in both. If there is any difference (any Residual
Current) it must have leaked away somewhere else such as to earth.
UK RCDs typically will trip on a current difference of 30mA.
--
Cheers,
Stan Barr stanb at dial.pipex.com
The future was never like this!