Incorrect Wiring - What danger

[Geoff Lane]

I am curious.

If lighting wiring was used in a room ring main circuit what could be the repercussions if it went unnoticed?

Geoff Lane

[brugnospamsia]

If fused as per a lighting circuit it will be (technically) OK

If it's fused at 30 amps and you load it to the full 8KW, something may get just a little warm ....

[Christian McArdle]

You mean you wouldn't notice several fire engines and several dead people choked or burnt to death?

Christian.

[Dave Plowman (News)]

Thought some did use 1.5mm for rings once? If used under ideal installation conditions (no bunching, etc) in a small house, I doubt it would cause a fire. Not recommending anyone doing this, but just as a discussion point.

[Christian McArdle]

It depends what "lighting wiring" means. I'd take it to mean 1.0mm in most cases.

Christian.

[Doctor Evil]

My God, Richard is getting worse. He now installs 1.5mm when it should be

2.5mm. This is why DIYers are frowned upon, when pros see this sort of highly dangerous garbage. Between his dangerous wiring and not servicing boilers for 10 years, Richard is one is walking disaster area.

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[Dave Plowman (News)]

Plainly you know nothing about electrics so stick to sawing through plastic pipes and wondering why they leak.

Interesting you now consider yourself a pro electrician. Is this since you asked how to wire an intermediate switch?

[StealthUK]

Anything between melted/blackened wire to a house fire. My guess is that a house fire would be pretty extreme. Any damage would all depend on the load used in that room and the fuse at the board end. There are most likely millions of homes up and down the country with dubious wiring that go unnoticed.

That's not saying you should do it - of course!

[Bob Mannix]

The repercussions are the Part P regulations.

'nuff said.

[Doctor Evil]

Richard, I have never asked how to install an intermediate switch. I know that.

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[Doctor Evil]

Mr Cranium, you gave advice on CH boilers...........read on...it make your hair curl...........

"Mine managed over 10 years without being touched before it needed a clean. 'Sooting up' once it starts, happens very quickly."

He didn't have his gas boiler serviced for over 10 years, and thinks knows all the answers in this field. Now on electrics Mr Cranium says....

"did use 1.5mm for rings once? If used under ideal installation conditions (no bunching, etc) in a small house, I doubt it would cause a fire"

Doubt it would cause a fire? The standard is 2.5mm for a ring main. Imagine plugging in a 3kW kettle or two into the main. My God!!! I can see why Prescott has introduced these new electricity regs to stop all this highly dangerous garbage.

Only on the Internet you see this. These people are dangerous, very dangerous, as people may take what they say literally.

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[Tony Bryer]

He didn't say he'd installed it and didn't advocate it. What he said was "If used under ideal installation conditions (no bunching, etc) in a small house, I doubt it would cause a fire."

As 1.5mm2 cable is rated at 16.5A when chased in wall, 19.5A clipped to a surface if you have such a ring and you plug in the appliances round it ring at suitably spaced intervals it will function without the cable rating being exceeded, let alone getting anywhere near causing a fire. But, as the quote made clear, if you move away from these ideal conditions - longer cable lengths, cables passing through insulation, bunched cables, appliances all at one end - you may very quickly reach a potentially dangerous situation.

[John Rumm]

Rather ungracious to lie like that, especially after Dave answered your question don't you think?

was it you said again...?

Oh yes:

"While on this topic.

1) Is it possible to have a two-way switch with a dimmer on both switches? 2) is it possible to have a two-way switches and only one dimmer? 3) How are 3-way lights wired?

Just a thought, someone may have come up with something."

[John Rumm]

I think you mean "ring final circuit", a "ring main" is something you are likely to find on the leccy companies side of the meter not in a house.

What do you think would happen?

Yes, that is right, the kettle would boil.

(Clue Alert: a ring circuit wired with 1.5mm cable would under ideal conditions still feed a 40A load without a problem (even worst case would still be good for 30A) - your 13A kettle running for a couple of minutes would seem to be unlikely to stress it too much... don't you think?)

Do yourself a favour, when in a hole stop digging...

If there was any safety justification for part P, it would be curtailing the activities of wannabe plumbers such as yourself, being let loose on the house electrics when nailing up their pair of combis... would not want the sparks getting too close to the overloaded gas meter now would we?

[:::Jerry::::]

No he didn't, I know that you can't follow discussion but even you would know what the sentence you edited out means ("Not recommending anyone doing this, but just as a discussion point.").

This is why DIYers are frowned upon, when pros see this sort of

The only danger area around this group is you IMM, Dr Evil or what ever you are getting yourself out of kill files with now.

[Geoff Lane]

A builder certainly should not use lighting wiring for a mains circuit though should he.

I know the regs changed in Jan 2005 but this was started in 2004.

Geoff Lane

[Dave Plowman (News)]

John, to you, I'm Mr Plowman, or just plain sir.

Unlike you, I have no need to hide behind myriad false names.

Now - are you still going to lie about not knowing how to wire an intermediate switch? Of course, you actually asked about a three-way switch circuit. Perhaps you don't even understand the two-way bit.

[:::Jerry::::]

No it bloody isn't you moron, more like 10mm minimum !...

After you have messed with a ring main it might have problems with a 6Kw load, anyone else would be thinking about putting many 100's of Kw load on a ring main....

Yes, I quite agree, you are a prim example of morons with little or no knowledge pretending to be an expert.

[Dave Plowman (News)]

And I've a feeling it would fail the current earth loop test requirements first.

[Dave Plowman (News)]

You plainly know nothing. 1.5mm conductors are suitable for some types of nominal 30 amp ring circuits.

Please stick to cutting and pasting from websites. Original thought isn't your forte.