Discuss 3 core - what colour do you use as a switch wire? in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
down here we used the red as common, sometimes come across the yellow used as it but not muchas above. use grey as N is standard practice to disassociate the black from neutral, thanks to the meddling of johnny foreigner. as for 2 way switching, back in the days of sensible cable colours, most of us used the yellow for common and R/B for strappers so that in the switch with the switch wire from the light, you has red with red and blue with black. this equates to black for yellow, brown for red and grey for black
not where i've been. generally yellow for common.
Brown permanent live.
black switch line.
grey switch linear neutral.
harmonisation did state not to use back as neutral any more so that it did not get confused with old black neutrals therefore you had in old 3 phase boards black and greys as neutrals. That wouldn't confuse any body would it.
also I was taught on a 2way switch if you follow the circuit through the switch in the off position then the grey would actually be a neutral.
check it out it s true via the lamp
Ah, this old chestnut.
Black (sleeved brown) as permanent live, because that's how flex 7, rock etc flexes come pre-wired, and because you use brown as switched live everywhere else where you haven't got a permanent live so it keeps it consistent.
Brown as switched live as you usually would if there weren't a permanent live.
Grey (sleeved blue) as neutral.
Also because 4 core flex comes with brown, black, blue, and green & yellow.
Black as Auxiliary live.
Brown as L1 with the feed (also brown) so browns go together.
Grey as L2 (sleeved brown) with the switched live (blue, sleeved brown)
Black (sleeved brown) because it's the other one.
how can grey be a neutral in 2 way switching when they're all live or switched live?
Reply to 3 core - what colour do you use as a switch wire? in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net