Wiring a LED AC floodlight up with no earth wire

[JohnW2]

John, No, I'm asking if the plastic bodies of e.g. vacuum cleaners and drills are the second part of double insulation.

Well, they obviously might be - that depends upon whether there is a satisfactory "first part of double insulation".

As I said, in the case of a drill, there might be a metal chuck (or metal parts of a chuck) which are touchable without any insulation between it and the user - so, in that case, it would presumably have some sort of "double insulation' within the drill (if it were Class II).

As I also said, in terms of satisfying the requirements for Class II status, true 'double insulation' seems much less common than reliance on 'reinforced (single) insulation'.

Kind Regards, John

 

[winston1]

Yes, I should have said "everything else is not class I"

 

[JohnW2]

Yes, I should have said "everything else is not class I"

You should, and had you done so, what you wrote would have made some sense - but, as Detlef said, what you did write did not make any sense.

Kind Regards, John

 

[ban-all-sheds]

Yes, I should have said "everything else is not class I"

And when challenged over it, did you go back and check to see if you'd made a mistake?

No - you did this:

If you don't know what I am talking about admit it. There is no reason to be rude and insulting.

Read this and learn. ....

 

[JohnW2]

I suppose that leads me back to my usual question, of whether a 'third category' (nothing to earth) item is actually 'allowed' if it does not have adequately 'reinforced' insulation to qualify as Class II. On the face of it, such an item probably does not provide adequate protection against electric shock - which, the in absence of an earthable metal casing, seemingly has to be provide by adequate

This obviously does not apply to things like drills, hair dryers, vacuum cleaners etc. which are outside of the scope of BS7671, but in relation to things which are within it's scope (which, I imagine, would include light fittings etc.), I've just noticed ...

This would seem to imply that, say, a plastic light fitting, which could not be Class I (since there is no metal to earth) would not be acceptable to BS7671 (i.e. 'would not be allowed') if it had only 'basic insulation' (i.e. not insulation which qualified as 'double/reinforced'), unless a further layer of 'supplementary insulation' were added as part of the installation process (effectively turning it into Class II).

I can't recall ever having seen that symbol on anything!

Kind Regards, John