Swa/pvc cable size

[Deleted member 26818]

Copper equivalent should be used for all bonding regardless of earthing arrangement

Not in order to comply with BS7671.

 

[Chr!s]

Not in order to comply with BS7671.

Not in order to comply with BS7671.

Not with you there spin, bonding need to meet requirements of 544, look at the note at bottom of table 54.8

This requires copper equiverlent

 

[Deleted member 26818]

Yes, Table 54.8 is only applicable where PME (TN-C-S) conditions apply.
For TT, and TN-S sytems, there is no requirement for a copper equivalance.

 

[Chr!s]

For TT, and TN-S sytems, there is no requirement for a copper equivalance.

Read 544, 1st paragraph last sentence, affording equivalent conductance

 

[Deleted member 26818]

That applies where the bonding conductor is required to have a CSA greater than 25mm².

 

[Chr!s]

That applies where the bonding conductor is required to have a CSA greater than 25mm².

It may read that way, GN8 gives a clear explanation and equation for the requirements of bonding, page 41

 

[Lister1987]

Chris,

I found this in the Sticky threads on this subject. It is the paper John Shepherd wrote that includes the table that Spin and i use a a good rule of thumb for guidance on the SWA CSA etc....



Using the armour of SWA.pdf

Anyone got acopy of the John Peckham table? Could do with seeing if thr one I've been given is correct.

 

[nicebutdim]

Anyone got acopy of the John Peckham table? Could do with seeing if thr one I've been given is correct.

Welcome to the forum, Lister

 

[Lister1987]

Welcome to the forum, Lister

Got to dabble in some thread necromancy from time to time

 

[Eddy Currents]

Anyone got acopy of the John Peckham table? Could do with seeing if thr one I've been given is correct.

Use SWA as CPC, a guide to the acceptability of steel wire armour use as CPC.

SWA as the CPC? In most case it is fine to use the SWA as a CPC.

gadsolutions.biz

 

[Lister1987]

Use SWA as CPC, a guide to the acceptability of steel wire armour use as CPC.

SWA as the CPC? In most case it is fine to use the SWA as a CPC.

gadsolutions.biz

As I Understand it, this is thr incorrect data and not John's information.

 

[Eddy Currents]

I'm not sure 100% but it does state

"Many thanks to John Peckham for authoring this"