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16A if twin & earth.

Looks like it.

Depends where the cable comes from.

No.

It probably will not do any harm - especially for the gas - as the internal pipes will be connected to the heating system earth wiring. Some water pipes possibly might not be connected to any earthing so would be better NOT bonded.

You do not need to bond internal pipework if the pipe emerging from the ground does not require bonding.

Which sections are those? You are if you know how and have the equipment - anyone is.

I'm confused. What have you connected to what so far? What is an inbuilt by-pass?

They are called 'widow-makers' - sexist, I know, but there you go.

No. Yes, some of them have 'L' and 'N' marked on them. Duh! Of course. I have heard it mentioned before but It doesn't really matter what the reason is, does it. Do you think the manufacturers mark the switches for no reason? D'oh! You have drawn me in again to your ever-expanding questions.

I did not say nor imply that the polarity did not matter nor should be ignored. If a switch can be fitted on the other side then obviously it is either made the other way round or the polarity doesn't matter and won't be marked.

I suppose that makes sense for the old lever switches - and they just carried on.

Please read all the posts.

MK.

Yes all corrected, thanks. Post #34

Oh well - can't please everyone. Just seems the wrong way round - although I know some places read right to left but they didn't discover electricity.

Never understood why the main switch is on the right anyway.

A toaster is a possible suspect - full of burnt crumbs. No tests without special electrical equipment and even with it random trips are very difficult to find.

Crabtree?

It's such a bad picture, I think that TLC one does have L & N -but there must be some that don't or have it the other way round.