Roofing Bolts as Earthing studs

[davesparks]

Taking the gland plate off and replacing it with a brass one gets my vote for lots of SWAs into one DB.

 

[sparks1234]

Yep, never seen it done but brilliant

 

[davesparks]

Yep, I totally agree with that, the only thing I can think that might improve the situation is if you put the banjo on then a lock nut before putting it through the enclosure, otherwise on a metal dis board it does not improve the reliability of the earth

How would the locknut help?

A paint cutting/jagged/serrated washer might help.

I prefer to use piranha nuts these days unless I have a lot of SWA terminating in the same place.

 

[sparks1234]

I'm just considering if it comes loose, if its tight then it should have a good connection, if its loose it won't have a good connection whether it has a banjo or not but if it had a banjo with another locknut separate to the enclosure that could help, but the spring type washer is a good idea

 

[davesparks]

If you fit it properly it won't come loose anyway.

 

[guest119]

All academic really unless you state whether the armour is the cpc as in a 2 core or a 4 core tp&n.
A 3 core used as an sp&n supply will have a core available for cpc use and the armour is then containment only.
Completely different scenarios.

Boydy.

 

[davesparks]

In what way is it different, the armour must be connected to earth in an electrically and mechanically sound manner in both situations.

 

[jamie-spark]

How could a tray. When the cables installed are SWA be classed as an exposed conductive part ?


Anybody ?

 

[nickblake]

nowt wrong with them just use a nylock to stop them comming un done

 

[davesparks]

if you are going to go to the trouble of getting nylocks to go with them, why not just get proper bolts in the first place?

 

[jamie-spark]

Anyone

 

[Silly Sausage]

How could a tray. When the cables installed are SWA be classed as an exposed conductive part ?

It's a secondary exposed c p.

 

[jamie-spark]

Hi archly how's that , there is no chance of it becoming live under Under fault conditions though. As the swa is already earthed. Gn8 also states this

 

[jamie-spark]

It's a secondary exposed c p.

Surely ( I know this has been done to death) that flexes
Lying over metal industrial kitchen furniture would be classed as exposed too, in this argument ( not that I agree with this )

 

[Richard Burns]

I think the main point is, is it part of the wiring system? Tray could be considered part of the wiring system, think about earthing cabinets containing electrical equipment, this would be to ensure the cabinet does not become live in the case of a fault, similarly for tray, though I would say the likelihood is low if the cables were all SWA.