Detached garage

[diditrain]

Hi telectrix, if i was to TT the garage, there would still be a path back into the house via the bonded central heating pipework.

 

[Engineer54]

The detached garage is no more than 5 metre`s from the house.

No problem then!! Should of asked you to advise in the first place, ...that or run the existing cable in a duct as Tel suggested!! lol!! Try conducting a sheath test on that cable your mate has installed, ...what's the betting it fails?? lol!!

 

[diditrain]

Yes, that could be interesting, to say the least.
Am i right in saying that the copper equivalent for the armoured is 7.39?

 

[Guitarist]

Hi telectrix, if i was to TT the garage, there would still be a path back into the house via the bonded central heating pipework.

Because of this, it is unlikely that you will be able to isolate the garage from the house (unless plastic is used in the pipework). 10mm bonding cable is the way to go imo.
To put your mind at rest, why not speak to your scheme provider

 

[Engineer54]

Yes, that could be interesting, to say the least.
Am i right in saying that the copper equivalent for the armoured is 7.39?

Let's put it in these terms, ...there is no way the existing 6mm SWA cables armour is going to provide your bonding requirements, so it's either changing existing cable for a 3 core 10mm SWA, (whose armour Still wouldn't comply for bonding purposes) or run in a separate 10mm bonding conductor!! lol!!

Steel requires about approx 8 times the CSA of a complying copper conductor, for it to be equivalent/suitable for bonding purposes!!

 

[diditrain]

Thank`s for all of the replies guys, been very informative.