On Sun, 8 Aug 2004 23:13:48 +0100, "Smudger" strung together this:
Why so?
>
Because running the circuit smack bang on it's rated current means that the MCB\fuse will overheat and/or keep tripping\blowing all the time. You always use the next highest CPD available, if you have a circuit current of 14A you use a 16A CPD, if the circuit current is
Yeah, but your shower would have to be on a very short piece of wet string to be pulling its rated current anyway ;-)
Smudger
On Mon, 9 Aug 2004 23:54:09 +0100, "Smudger" strung together this:
Well yes, but that's the way it's done so there...! If you were to actually calculate the circuit current and size CPD's acordingly you might get away with a 45A circuit protecting a 10.8kW shower in some circumstances but in practice, experience and best judgment are usually used.
Have something to add? Share your thoughts — no account required.
Ask the community — no account required