Swa bonding, what method.

[Wilko]

If it's not a cpc then it just requires supplementary bonding to earth

Good point
I'm just thinking during the masonry drill attack the armour may be called upon to act as cpc so beef it up ?

 

[Leesparkykent]

The banjos don't even need to be linked together if glanded into a bit of steel trunking that's earthed.

 

[Ian1981]

Good point
I'm just thinking during the masonry drill attack the armour may be called upon to act as cpc so beef it up ?

Depends as the steel armour conductivity isn't the same as copper so tho you might use a fly lead of 10mm the armour may not be even that equivalent

 

[westward10]

The banjos don't even need to be linked together if glanded into a bit of steel trunking that's earthed.

Reg 543.2.7 rather clouds all this.

 

[Ian1981]

I link them anyway, just one of those things I like to do.

 

[Ian1981]

Reg 543.2.7 rather clouds all this.

What is the jist of it without me getting off me couch and actually reading it?

 

[Leesparkykent]

Here..I wouldn't class trunking as an accessory though.

 

[Ian1981]

Here..I wouldn't class trunking as an accessory though.

View attachment 37222

Na that's if you use conduit say as the cpc and you take a fly lead from the metal back box to the socket as the conduit is the cpc.
In this case the trunking is not acting as a cpc it mearly becomes an exposed conductive part because the swa is glanded to it.

 

[Wilko]

Depends as the steel armour conductivity isn't the same as copper so tho you might use a fly lead of 10mm the armour may not be even that equivalent

Agreed.
OP scenario of 16mm is a waste of copper imho

 

[Leesparkykent]

Na that's if you use conduit say as the cpc and you take a fly lead from the metal back box to the socket as the conduit is the cpc.
In this case the trunking is not acting as a cpc it mearly becomes an exposed conductive part because the swa is glanded to it.

exactly my thoughts or using 2core SWA and the armour as the CPC.