On Wed, 29 Dec 2004 16:21:13 GMT, Lobster
strung together this:

Dave wrote:
Can someone tell me whether it's recommended or mandatory to install a
double pole isolator switch on a bathroom extractor fan? If mandatory I
presume anywhere other than z1 or z2 is OK?


Certainly mandatory if it has any form of overrun (timer, humidistat
etc) but AFAIK there's some disagreement as to whether it's needed if
the fan is controlled only from a normal switch, on it's own (ie with no
source of power from anywhere else).


You mean battery powered? If you have no external source of power then
it needs an isolator. If the fan requires an isolator when it is a
timer model that's because it is a fixed appliance. If it is a
non-timer model it's still a fan, so needs an isolator.

When is a fan not a fan?
Never.

I fitted one like this during a
recent rewire and asked the sparks who was going to be testing my
wiring, and he said the DP isolator wasn't needed then.

He wants sacking.

Others will be along shortly to disagree with this!

Yep, I'm sure they will. ;-)
--

SJW
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