UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

TonyDuell · 3rd Sep 2020, 11:15 am

To tie in with the main subject of this forum, somewhere I have one of those coin-operated timer things used for rental TV. It has (had?) a length of 3 core cable coming out, 'new' colours ;

Brown : live in from TV mains switch.
Blue : common neutral
Green/Yellow : live out to TV.

I can't remember if the Gn/Y wire was originally sleeved. But I think not, this colour code was given in a wiring diagram moulded into the back of the case.

Incidentally, the old 3-phase colours were red, yellow, blue with black for neutral. The new are brown, black, grey with blue for neutral. I once asked an experienced electician

"If I see a switchboard where the incoming wires are black and blue, how do know if it's 'blue phase' on the old colours or 'black phase' on the new?"

"You check it. As you would no matter what the colours are."

3rd Sep 2020, 11:15 am	#108
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,225	Re: Bodges To tie in with the main subject of this forum, somewhere I have one of those coin-operated timer things used for rental TV. It has (had?) a length of 3 core cable coming out, 'new' colours ; Brown : live in from TV mains switch. Blue : common neutral Green/Yellow : live out to TV. I can't remember if the Gn/Y wire was originally sleeved. But I think not, this colour code was given in a wiring diagram moulded into the back of the case. Incidentally, the old 3-phase colours were red, yellow, blue with black for neutral. The new are brown, black, grey with blue for neutral. I once asked an experienced electician "If I see a switchboard where the incoming wires are black and blue, how do know if it's 'blue phase' on the old colours or 'black phase' on the new?" "You check it. As you would no matter what the colours are."