Discuss Red, blue and black cable in the UK Electrical Forum area at ElectriciansForums.net
BTW, @buzzlightyear why is your diagram showing the cores in the wrong order? Old 3 core and earth is red, yellow, blue…. And your new cables on the right are similarly mixed up…. Should be brown, black, grey.
Cable type | Old core colours | New core colours |
Single-core + bare cpc | Red or black | Brown or blue |
Two-core + bare cpc | Red, black | Brown, blue |
Alt. Two-core + bare cpc | Red, red | Brown, brown |
Three-core + bare cpc | Red, yellow, blue | Brown, black, grey |
Some of the vauxhall factory in Luton is wired like this the live is the colour of what phase it goes to in the DBIn some older buildings where there was 3 phase supplies serving single phase loads, and the installation was singles in conduit…. The phase colours were used.
So normally where you would see red, black and g/y, you could have yellow, black, g/y or blue, black, g/y
If metal conduit, there may be no green/yellow…
What is the situation you have found?
BTW, @buzzlightyear why is your diagram showing the cores in the wrong order? Old 3 core and earth is red, yellow, blue…. And your new cables on the right are similarly mixed up…. Should be brown, black, grey.
I’m not 100% certain the cpcs are in the right place either.
Reply to Red, blue and black cable in the UK Electrical Forum area at ElectriciansForums.net
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