Removed old ceiling light which had only 1 x brown and 1 x blue wires on light fitting and single switch with no other lights on same switch. Cable from ceiling has only 1 x red 1x earth and 1 x blue.
New light fitting has two wires 1 x blue and 1 x brown.
Connected new one:
brown light wire to red ceiling cable,
blue light wire to blue ceiling cable and earth to terminal block.
Light stays on permanently and will not respond to switch.
Light is operated by single switch only operating this light.
Old light fitting had one blue and one brown wire. Single Cable from ceiling had red, blue and earth wires. Old fitting wired brown to red, blue to blue and earth in terminal block. Wiring diagram created before disconnection.
New fitting had also one blue and one brown wire connected blue to blue, brown to red and earth to terminal block as per wiring diagram and instructions with light fitting which said brown live to live (red) blue to blue and no earth required as non metal light fitting.. Light stays on and switch has no effect.
Removed new fitting and rewired old fitting exactly as original and now that light stays on permanently.
There have been no other changes.
Are you a tradesperson and able to answer this question?
How was the old fitting wired up?
My edit…. Is the switch actually operating, seems like if what you say is correct, that the switch is stuck in the on position.
An example of how the untrained can so easily make mistakes when trying DIY electrical work even when initially it looks obvious. Luckily the result of this mistake was a simple inconvenience, all too often electrical mistakes are quite shocking or catching (puns intended). Ask yourself, “can I competently carry out an Earth Fault Loop Impedance Test and can I record and interpret the test result correctly”? Unless the answer is, “yes I’ll go get my installation tester right now and check it’s calibration certificate is in date”, then you shouldn’t even undo the cover of any electrical accessory because you may be opening a can of worms.
My advice is that unless you are at least qualified in Part P you should never attempt any domestic electrical work without the direct supervision of a registered competent electrician. Even when the untrained do manage to get all three wires in the right place they still don’t know the requirements for earthing or if their chosen light fitting is suitable for the environmental conditions, they wouldn’t know if the circuit meets requirements for automatic disconnection amongst many hundreds of other safety requirements that a professional would pick up on as second nature.
Call in a professional.
Looks like you have mixed up your wiring as you say now when you have put your old light back on it stays on permanently by the sounds of things you have old wiring colours and it's a 3 core and earth which will have a red permanent live a yellow which is a switched live which I dont hear you mentioned and a blue which is a neutral providing its wired correctly otherwise you would have only had a red and a black wire if it was old colours not a red and blue guessing the red which is a permanent live and not a switched live like the yellow should be is keeping the light on permanently look through the wiring and see if you can find a yellow and swop that with the red
Answered31 May 2021
0
Anonymous user
As above it seems you’ve fell into the trap of either not running the switch wire and created a permanent live hence the unit isn’t responding. My suggestion is if ya have a fluke or similar tester try belling out from switch to TO LIGHT END to find the correct location of the cores. Once if you manage this you should be able to identify your switch wire from the supply etc. but best to always seek professional help if not qualified in any tradesman’s field. BEST MOT TO ATTEMPT Electricity remember is silent and not seen AND LETHAL IM MANY CASES. PLEASE TAKE EVERY PRECAUTION NECESSARY. GOOD LUCK
