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Hi John, I think you've started me thinking in the right direction now - I need to find the break in CPC continuity and I need to find what else is connected to this circuit apart from standard light pendants - is that what you're saying? Because, obviously, if it was just open circuit...

Fitting a new light fitting, so using Zs to confirm CPC continuity. Haven't tested dead yet, but, like I said, I will do now. CU is spot on, no problems.

RCD trips on difference of current between L & N, so would still trip without CPC continuity.

That's to be my first port of call on Sunday, along with an inspection of each other lighting point on the circuit. Open circuit CPC wouldn't explain the N - E reading of 81v with the light switch off though - in fact it wouldn't explain why the alarm sounded on my meter when connecting the...

Hi all, Could do with some help. At a house yesterday and came across a problem on the upstairs lighting circuit whilst testing. It's a three bedroom, traditional semi. TN-C-S MK 12-way, twin RCD board. With all other MCBs OFF, except for the lighting circuit, I attempted to...

John, this statement is 10 x worse than the one about the '0.05' ........you're slipping. And 'Scoby_Beasley', you really need to make sure of your facts before posting advice. :)

Yes, annoying, isn't it? You go over the top with the cooker circuit in your new kitchen, just in case - you run a 10mm cable on a 50 Amp MCB. You pop out with the missus to choose your nice new cooker and when it arrives the instructions tell you you should only connect to a 40 Amp, 6mm...

I have only ever fitted one of these ceiling fan/lights, although I have come across a few, (both my mother and mother in law have them), but I have yet to come across one with it's own, seperate isolator. They utilise the existing lighting circuit via the existing light switch and you run a...

The irony is in the fact that they are only isolating the 'Line' conductor by pulling the fuse - not the 'neutral'.......was I not clear?? :).......yet you need 3-pole isolation to work on a fan.

I wasn't implying that either type of fan did/didn't require a seperate isolator - I was commenting on the reasons that Bernard gave for this seperate isolator. I was also commenting on what you termed 'true isolation'.........ironically, a spark can get the DNO in to pull the main fuse so...

Would you concede that anything that could go wrong with the extractor fan in the bathroom could equally go wrong with a ceiling fan/light that you may have mounted in your living room?

I was always under the impression that the reason for a seperate fan isolator was so that if the fan needed to be worked on, it could be done without having to isolate the lighting - which would obviously be an issue if the bathroom didn't have a window. The 'Electricians Guide to the...

Again, everybody goes around the houses to explain something that really is quite simple. Measuring R1 +R2 is one method of proving continuity of the circuit protective conductor within a circuit, before energising the installation. Measurement of R2, (also acceptable), is another method...

You're still going to have to undo the light fitting to access the CPC - so not going to help you, really. (unless it's a class 1 light fitting, of course)>

The gas pipe doesn't need 'earthing' - it may require 'bonding' if it is deemed to be 'extraneous' where it enters the property.

OK Mr "I've done all this electrical work without any help".........if that's how you want it, that's how you'll get it. Taken from all the drivel you were spouting, here is your question:- And here, after giving it a little thought :roll: , is your 'no-bulls**t' answer:- NO, the...

No thought needed at all - get an electrician in to check things over if you are worried..........what you have posted here shows that you have no idea what you are talking about, regardless of how many DIY electrical books you have read. Sorry. :)

We don't half get some babbling when you pair start on about something. Bottom line is, the 'Electrician' who is contemplating running power to an outbuilding will weigh up the conditions as to whether he should use the 'system' earth or supply the outbuilding with it's own 'TT' earth. He...

:lol: :lol:

Yes, but you're missing what I said. If we didn't reference the star-point to earth in the first place, then there would be no need for earthing anything and we wouldn't have to worry about bonding gas pipes etc that introduce earth potential. Think shaver socket in bathroom - but applied...