On Wed, 03 Dec 2003 16:40:31 +0000, 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? 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. Having got my 16th edition
regs certificate earlier this year I'm wondering what I've missed!

Always willing to learn....

Here are two resons:
1) It mmight not be obvious to someone that supply is from the upstairs
ring rather than the downstairs lighting. Not withstanding that there
ought to be a service isolator for the fan.

2) If the fan is the sort that requires both permenent and switched live
supplies (such as timed overrun models) then you will have also to
supply switched live from two seperate circuits. Which not only is contrary
to the regs but poses hazards for maintainers and might even make two
circuts have common live connections through the fan timer circuits.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html