On Thu, 13 Nov 2008 00:00:31 -0000, "George \(dicegeorge\)"
wrote:

I've read here that clamp meters are about 5% accurate,
so if I bought one like this for £20 (+vat+postage)
http://www.tlc-direct.co.uk/Manufact...Test_Meters_7/

0.1amp = 24 watts
so could I have one before the Consumer Unit
and use it to check if anyone's left lights on,
or got a electric fire on etc?


Can't you just ask ?