Light wiring issue
- Thread starter DizzyPip
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How do you intend to comply with BS 7671 whilst identifying a phase conductor in some other way?
It is not a (permanate) phase conductor, it is a switched phase conductor.
Brown or red for a permanate phase conductor, something else for a switch phase conductor makes perfect sense.
Which is a phase conductor, and should be identified as such. As it belongs to a single phase circuit, it must be brown.
Do you ever wire central heating systems or similar?
We're not talking about conductors in a flex though.
What's the difference?
What colour is alphanumeric?
What colour is alphanumeric?
Alphanumeric is L, N, and E or the earth symbol. What is your point?
That, presumably, you may only attach L to brown wires and N to blue wires.
(There is no alphanumeric for protective conductors - must be G/Y.)
(There is no alphanumeric for protective conductors - must be G/Y.)
I wasn't saying in place of green/yellow. I was saying that it is the accepted marking. Alphanumeric can be used instead of colour - so it could be attached to a different colour.
In the same way that the great majority of people over here usually does - by over-sleeving some other colour (usually blue, possibly black or grey, or maybe even some other colour) with brown sleeving at the terminations. Compliant with BS7671, but clearly functionally distinguishable from a plain brown-insulated conductor. As I implied, if I had to use twin brown for a switch, I would probably over-sleeve the brown with brown, for functional identification of the S/L.
Kind Regards, John
Common sense says that a SWITCHED conductor should be identified as such, just like it is in France and Australia. BS7671 is wrong in this case.
If you test a wire for dead and it is dead when you test it then
[1] a phase conductor will stay dead
[2] a switched phase conductor may become live if some one operates a switch somewhere
Whilst oversleeving another colour is compliant with BS 7671, let us not forget that BS 7671 does clearly state that the conductor should preferably be identifiable throughout its length. Really twin brown is the correct cable for such an application in a domestic premises and I see no reason not to use it (as do all contractors here who would never, ever, ever consider using anything else for that task).
If that risk exists then earth it.
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