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Hi, is it a requirement to run an earth wire to outside light(although its double insulated) or is it probably just best practice ? I was replacing my son,s existing outside light on a new build house with a pir security light but found there was no earth to his existing light. Thanks
 
Why would a new installation be installed in such a way, so that the potential unknown owner would have to install Class 2 luminaires?

To coin previous catch phrases, although not impossible, just very unlikely.

I am not doubting there stupidity, just debating whether it is actually against BS 7671.
 
Nice.......but I bet he had an earth.....seems that Essex is quite prepared to run a cable to an external light without one

Whether it had an earth or not is irrelevant as in the example it counted for nothing.

I would be happy to run a cable to any double insulated electrical equipment with no earth as it is specifically stated that an earth is not required. Would I do it in the ops case - no.
 
I am not doubting there stupidity, just debating whether it is actually against BS 7671.

Ok, but it doesn't help the OP; we all know - unless the particular installer had gone wibble that day - that there will be a cpc at this particular point in question. OP just has to look for it. Now he knows this is the normal accepted way of doing things.
 
Getting a bit complex for the OP (me) Is there no definitive then, on whether a CPC should be taken to an external class 2 luminaire on a new installation ?
On a new installation then yes of course a cpc should have been ran to the light.
Irrelevant if it’s class 2 what if it was to be changed in the future to a class 1?
Can’t be done because some numpty cut the cpc out?
The regulations require a cpc to each point.
You are not using the protective measure double and reinforced insulation as it’s prohibited on a domestic installation.
It’s the same principle as wiring to a light switch which is plastic,why wouldn’t you install a cpc to it? What’s worse is, if it’s a twin and cpc cable ,the cpc has been cut off!
Hope this helps :)
 
Getting a bit complex for the OP (me) Is there no definitive then, on whether a CPC should be taken to an external class 2 luminaire on a new installation ?

It will have one there, unless the contractor lost his head; you just don't need to earth a Class 2 fitting, in fact you must not (manufacturers instructions taken into account).

So when you go back to your sons house, locate the earth & connect it to your Class1 fitting in an orderly fashion.

Ignore the heated debate, it will be there & you will find it. However you will need to verify its continuity.

PS if its not there, sue the ba****ds :)
 
Ok, but it doesn't help the OP; we all know - unless the particular installer had gone wibble that day - that there will be a cpc at this particular point in question. OP just has to look for it. Now he knows this is the normal accepted way of doing things.

I think it does help as the op is looking to go back to the builder. If there is no Reg break then he cannot do that.
 
I think it does help as the op is looking to go back to the builder. If there is no Reg break then he cannot do that.
There is a regulation break.
411.3.1.1.
Regardless if the light is class 2, the protective measure double or reinforced insulation can’t be used on a domestic installation.(yes by nature the light doesn’t require a connection to earth).
By the nature of the light fitting being class 2,it’s not inherently dangerous at the moment but it does not comply
 
Last edited:
essex you've made you point, why do want to keep making it?

Us house bashers have nothing in our vans besides crisp packets mucky dees waste, and twin & earth cable.

I am not sure why you are getting so upset. I was enjoying the debate but I will leave it if you would prefer. I would not want anyome thinking this is a forum for debating or anything like that.
 

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