I am fitting some mains heat/smoke detectors. They are interconnected using 3 core and earth. The colours are Brown, Black and Grey and the detectors have live, neutral and control terminals.
Obviously the brown is used for live.
Is there a standard for the use of the black & grey in this situation?
Many thanks, Roy
On Sat, 24 Mar 2007 10:22:46 -0000, "RzB" mused:
Use whatever colours you want, as long as you sleeve them with the correct colour sleeving.
Yes - use grey (sleeved blue) for neutral and black (no sleeve required) for the interconnect line.
Stuart/Andy, many thanks, Roy
In message , Lurch writes
The powers that be are trying to discourage the use of black as a neutral, since it might encourage people to mix the old and new three phase colour codes. Apparently!
On Sat, 24 Mar 2007 21:21:37 GMT, Clive Mitchell mused:
I don't need any encouragement. ;)
There was an NICEIC documnet that went round at the time the new colours came about recommending the use of brown as live, grey as neutral and black as earth when using 3 core SWA for single phase supplies. I could never see the sense in it myself, well, I sort of could but didn't agree so ignored it.
As a rule of thumb, if it's in the neutral terminal then it's probably a neutral, but also note that assumption is the mother of all f*ck ups!
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