Discuss Can someone help me wire a new light fitting into an old house with old wiring systems. in the UK Electrical Forum area at ElectriciansForums.net
Egggh, I’m full of sunday roast, but I still don’t follow you.Even if the switch wire isn't identified, the fact that you use both black (or now blue) to the lamp means it doesn't actually matter (unless it's an edison screw) - although it's clearly preferable to identify the actual live to the lamp fitting.
Egggh, I’m full of sunday roast, but I still don’t follow you.
Modern ES holders are not polarity biased.Which bit the es?
It's because with the es lamp fitting, it does matter, the switched live (which could be a red wire from the switch - if twin red, the black wire from the switch - if standard t&e,
Or black with red sleeve if std t&e done correctly) must go to the centre pin on an es fitting as it's polarised - and a test requirement.
But with a standard bayonet fitting, it doesn't really matter whether the black neutral goes to either connection, as long as the other black switch wire goes to the other connection on the lamp as they are not polarised.
(read brown/blue for new colours red/black - just kept with the old colours as that's what the original question was in)
I gave a disagree Julie because you seem to be saying that it doesn't matter whether the black [or blue] switched live is clearly marked or not. Ok it'll work at the end of a loop in system with only two cables at the light but elsewhere you'd have a 1 in 3 chance of it working or not.
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