roughly what year did they start Earthing lighting circuits?

[bigbaddave]

Trying to date an install, can anyone give me a rough idear what year? Thinking late 60's at some point

 

[MDJ]

hard to be sure, there are some stranded tinned T&Es about installed in the 60s, that doesn't mean twins without cpcs were still not installed though, one key to finding out is the colours of 3 cores, if they were red, blue and white or red, blue and yellow, the yellow was early 70s onwards, white definitely 60s, I would suspect your installation is at least 40 years old, could be 50

 

[KAS1]

Well, I started work in 1972 and we always ran an earth to all lighting circuits.

 

[Andy78]

I have worked on 60's installations that are twin with no cpc, twin with cpc, and twin with cpc that has been close cropped at every point.
Not much help I know, but I suspect cpcs were sometimes used even back when they were not required making installs difficult to date.
Being a relative youngster I wouldnt know when the regs changed to make lighting cpcs compulsory....some of the old buggers on here might though

 

[MarkieSparkie]

A CPC in lighting final circuits became a requirement with the introduction of the 14th Edition of the Wiring Regulations:1966, Regulations D6 & D7.

 

[Engineer54]

Any lighting circuit run in metal conduit, and you'll be talking almost from year dot!! lol!! But that would have been seen mostly in larger commercial and industrial installations. As for lighting sized T&E cables, the inclusion of a CPC started around 63, and was a standard requirement long before the end of the 60's.

 

[telectrix]

couple of years ago, we rewired a 1926 house. ripped out the original wiring which was all twin with lead sheath. all lighting points were earthed with the lead clamped into galv. steel JBs.

 

[Octopus]

Theres a spark in Farnham who is telling customers that CPC 's were only mandatory from the 16th edition!

 

[somersetsparks]

Agree with the above(s), tended to be the cheaper contactors that's only used twin and skin, better domestic installs had CPC's right from the start of pvc, I tested one the other day 1962 and it had cpc, admittedly twisted together above all fittings ;-)

 

[driverman]

Agree with above comments. Can anyone remember a period in time when many domestic properties were wired in pvc singles!
The single lives were looped from switch to switch and the neutrals were looped from light to light. An absolute pain in the neck if a new complete light point with switch was required. The existing light points would only have a switch wire and neutrals. All had earths though.

 

[somersetsparks]

Agree with above comments. Can anyone remember a period in time when many domestic properties were wired in pvc singles!
The single lives were looped from switch to switch and the neutrals were looped from light to light. An absolute pain in the neck if a new complete light point with switch was required. The existing light points would only have a switch wire and neutrals. All had earths though.

Have seen that to in flats circa 1980

 

[KAS1]

Sounds like a normal conduit wiring system to me...........

Agree with above comments. Can anyone remember a period in time when many domestic properties were wired in pvc singles!
The single lives were looped from switch to switch and the neutrals were looped from light to light. An absolute pain in the neck if a new complete light point with switch was required. The existing light points would only have a switch wire and neutrals. All had earths though.

 

[snowhead]

Sounds like a normal conduit wiring system to me...........

Without the conduit tho'.....

 

[POWERFULL]

We started installing cables with cpc in 1963 just before the 14th Edition Wiring Regs.
Before that we just ran a Earthing cable to each lighting point.
On Commercial & Industrial Installations we used the conduit as the Earth

 

[Jdsparky]

Agree with the above(s), tended to be the cheaper contactors that's only used twin and skin, better domestic installs had CPC's right from the start of pvc, I tested one the other day 1962 and it had cpc, admittedly twisted together above all fittings ;-)

Been on job today house built 1963 wired exactly as you say in singles permanent live we're red sheathed singles and sw lives were grey sheathed, with a green earth ran around all points, although these were terminated into fittings apart from when some muppet changed the fittings at a later date and left one of the two earths in the ceiling, resulting in most of the circuit having no earth.