old water main protective bond -

[Engineer54]

See 543.2.1 (vii) and 543.2.6

What is considered common practice is often different to what is allowed according to BS 7671

I don't have the Reg's with me right now, so what does it say??

 

[needasparks]

I thought cpc's on lighting never came in till 72, although it was being installed 2yrs before.

 

[Knobhead]

1973 was the first rewire I did, my own house. Lighting CPC’s in there then. My house was the only one on the road that didn’t have the water and gas as the only earthing method, all TT supplies.

 

[Engineer54]

All i can say, is that those council houses that were completed at the very latest early 60's had lighting earthing conductors. Though i'm not totally sure, they were still using the black TRS T&E too. So when did they start using PVC T&E, as i was in the industrial side of things in those early years, where you never saw T&E in any form...lol!!

But i certainly saw these T&E lighting circuits while helping my uncle in his local electrical business before i even started my training years.... so somewhere along the line there's a bit of discrepancy in when we saw CPC's being used in lighting circuits...lol!!!

 

[johnboy6083]

The regs I was referring to basically say that extraneous metalwork can be used as CPC, as long as it is an equivelant CSA to cu, it's not under stress, it's it an oil or gas pipe, and precautions are taken against its removal.

 

[telectrix]

cpc's were used in lighting circuits earlier, but there were still a lot of houses without , done in the 60's . last week i was on a 1966 build with no lighting cpc's. a pair of metal wall lights had been fitted at some time, with a single cpc picked up from the rfc in the loft.

 

[vernam616]

CPC's in lighting circuits were introduced in 1966

Took this from NICEIC, SNAGS AND SOLUTIONS PART 3 INSPECTION AND TESTING