PE from metal back box to socket

[Upton Sparks]

I was also thinking of Reg 526.1 as well to why you should earth the back boxes with a lead.

I don't believe the screw achieves that ....

So your not confused, my position is;
I'm with putting the fly lead in, I think that is the right way. I am also on the opinion the back boxes is an exposed conductive part. regardless of it being buried in the wall.

But I am now starting think about it, but I have taken on board the thoughts and option of everyone on here and there information from and GN8. this is leave me with a question.
how would you code this on a EICR. C3 or not bother ?...

Anyway enough for today. Happy new year everyone we'll pick this up next year

 

[westward10]

GN8 does not quote a Regulation for its statement.

 

[pirate]

Pirate peeks above parapet...
Question:

If you have a metal back box, whether with a fixed and moveable lug or not, the faceplate screws earth the cpc to the box, so the only danger is if a live comes loose and touches the back box, maybe when you are removing it for inspection, at which time it really ought to be isolated, but might not be if for testing?
Maybe a live comes loose and touches the back box due to poor installation...
I don't know, I'm only asking...
but what is the problem with just taking a cpc from the faceplate earth terminal to the back box? I mean, it's just 6" of wire, and takes less than a minute to do?
If installing surface mounted metal boxes with metal faceplates, you would take an earth from the faceplate to the box, wouldn't you?
Is there a downside I'm not seeing?

 

[Deleted member 26818]

I imagine, the downside would be that it would increase the time taken to install each point.

 

[pirate]

Yes, Spin...that is the downside, but as my post said, it takes less than a minute...
I know, 200 sockets in an industrial unit = a lot of extra time, but for most folks it's maybe 20 or 30 sockets at a minute each...
My analogy is putting on a lifevest when I go out boating...it takes a minute...

 

[Bellendian]

Why are folks getting so excited about adding the flylead if its a metal accessory?
I can kind of understand if you mean when replacing a plastic light switch for metal, and cpcs were already terminated in back box, easier just to add fly lead, but in every other instance I'd always prefer to run cpcs direct to accessory, and leave it at that.
For some reason on metalclad surface mount gear I always fit a flylead, but tend not to bother with flushboxes. Beginning to question the logic with that but there you go!