Earthing back boxes..

[Notsosmart]

Ok I'll throw my thought grenade into the night (& lend myself to being shot-down!)

How about the requirement now for taking each leg of the ring to twin Earth lugs on socket faces; should we earth to the back-box from each of those? or how about taking one leg back to the back-box & then flylead to the socket face.

INCOMING

 

[Gravid]

Ha Ha, the thought grenade, i like it. I always double one leg back to the back box, thats what i was trained to do, so its kind of auto pilot. If theres two lugs on the socket face i connect one to each of them, mainly because i was told that at least if one does come loose or snap the face is still earthed.

 

[YTSOxford]

I was told about not having to earth the back boxes when there is a fixed lug but still fly earth the box just incase.

Although I have had another spark give me a headache over what should be earthed first! I always go straight into the earth lug on the socket then fly to the box, but he does it the other way round. Whats preferred???? Still got the headache from it!

 

[Spudnik]

There is no specific regulation with regards to this subject, however it is good practice to go to the socket terminals first as this is where the CPC should go, to protect the appliance/end user.

Earthing of the box is purely supplementary.

 

[YTSOxford]

Okay thanks, good to know!

 

[Mr Mark Sparks]

i also would go outlet first
if going to the box first dont cut the cpc those terminals are ****

 

[Lou7]

No need to earth back of box if you have one fixed lug is correct according to Niceic engineer. what about the reg that says all socket earths in separate terminals if they are to be used for computers, even at the DB!!