How Old is Copper Clad Aluminium etc

[Marcus Vaughan]

Hi All,

I'm part way through testing an empty old house with all sorts of older wiring and a 3036 board in order to work out whats needed.

First circuit is copper clad aluminium ring final. I measured one of the strands and have it as 7/036.

Question - am I wrong to assume is imperial?

I do not know when this was commonly used/installed.

In fact I had a decent document or web page once which gave a kind of history of UK wiring with dates etc. - but I can't find it. Has anyone got anything useful?

I need to investigate this particular circuit further as IR for LN = 26 Mohms despite the house being empty, LE and NE at just other 100Mohms so maybe rewiring anyway.

Pictures because we all like pictures, from right to left - circuit 1 is copper clad ring, circuit 2 is copper clad ring mentioned with low IR. Lights are copper - but not sure about the last two yet.

 

[Pete999]

Hi All,

I'm part way through testing an empty old house with all sorts of older wiring and a 3036 board in order to work out whats needed.

First circuit is copper clad aluminium ring final. I measured one of the strands and have it as 7/036.

Question - am I wrong to assume is imperial?

I do not know when this was commonly used/installed.

In fact I had a decent document or web page once which gave a kind of history of UK wiring with dates etc. - but I can't find it. Has anyone got anything useful?

I need to investigate this particular circuit further as IR for LN = 26 Mohms despite the house being empty, LE and NE at just other 100Mohms so maybe rewiring anyway.

Pictures because we all like pictures, from right to left - circuit 1 is copper clad ring, circuit 2 is copper clad ring mentioned with low IR. Lights are copper - but not sure about the last two yet.

View attachment 50490

CU clad Alum cables were used during the copper shortage 60s 70s if my memory serves me right

 

[Dustydazzler]

As already mentioned the solid green earth cable and presence of solid green over sleeving suggests to me 1970s.

Old installations from the 50s and 60s tend not to have earth sleeving and just twisted up bare

 

[Marcus Vaughan]

In certain conditions, copper wire must be specially treated to remain effective. Tinned copper wire is a type of copper wire coated in a thin layer of tin to protect the copper from corrosion that would decrease the wire’s efficiency in humid or rainy climates, high-heat environments and in certain types of soil. read MV

Reddit.

 

[telectrix]

Reddit.

youse a frog?

 

[Bobster]

Reddit.

He's not wrong, although not likely to be found in a domestic environment, I only see it now on special bus bar installations.

 

[telectrix]

how old????? cut it and count the rings. it works with trees.