In message ,
PoP wrote:

On Wed, 03 Dec 2003 15:59:08 GMT, Martin Angove
wrote:

However, I don't see what you are getting at with your comment.

Which comment? Elucidate and we will expand.

Locking up.....

I was under the impression that fan circuits would be run as a spur
from the upstairs ring. I guess I'm basing that assumption on a
previous house I owned where I know that was the arrangement (and I
didn't wire that property, it must have been before the 16th ed came
out).

Could you please explain what is wrong with running a fan circuit as a
spur from the upstairs ring?

It wasn't that which caused the problem, it was the suggestion that
for a run-on fan you should wire the "permanent live" from such a spur,
but take the "switched live" from the (e.g. bathroom) light switch. In
this instance you have connected the fan across two circuits which
*should* be separate for all the reasons already mentioned (refer to my
previous reply).

I would assume from a technical standpoint
that providing it is properly fused (that is, minimum fuse rating - 3A?)
and appropriate cabling is employed then it would meet the requirements
of the 16th edition regs.

If the fan was, say, a stand-alone fan controlled by its own switch or
humidistat for example, then there's no problem connecting it to the
sockets circuit. In fact, especially for large fans in large kitchens
for example, there are positive benefits.

Having got my 16th edition regs certificate
earlier this year I'm wondering what I've missed!


I'm not sure you missed anything actually in the exam, except the very
small but vital point of keeping circuits separate. I took mine earlier
this year too, and don't think that was mentioned, but then a lot of
other stuff wasn't mentioned either.

Always willing to learn....


This is the kind of point which to many people seems so blindingly
obvious as not to need labouring (oh boy, after last night, do I know
about labour!) but which to the person on autopilot can quite easily
lead to a major safety issue. Again, for clarification of the possible
safety issues I refer the reader to my previous reply on the current
version of this thread :-)

HTH

Hwyl!

M.

--
Martin Angove: http://www.tridwr.demon.co.uk/
Don't fight technology, live with it: http://www.livtech.co.uk/
.... Man who eats too many prunes, sits on toilet, many moons!