Loop in ceiling rose - identification

Myser

Existing ceiling Rose ----> New light fitting
Group of black wires ----> Blue (neutral)
Yellow wire ----> Brown (live/phase)

Still not sure how your fan is being switched though?

I_have_spoken

Maybe the yellow is from the fan trigger and the fan power is why you have an extra pair of wires on the 3-screw terminal blcoks? I'd expect the fan to have continuous power so it can 'run on' after the trigger is de-energised. Try disconnecting the blue wire and see if that knocks out the fan.

This is the ideal layout, on the OPs they may have done something odd with L1 from the light switch.



Best bet is an electricians screwdriver with a neon so you can probe what is live when switches are on/off etc.

http://www.amazon.co.uk/exec/obidos/ASIN/B000K0J8WG/ref=ox_ya_os_product

Obviously you need to exercise caution when live terminals are exposed.

Myser

I_have_spoken wrote: »

Best bet is an electricians screwdriver with a neon so you can probe what is live when switches are on/off etc.

http://www.amazon.co.uk/exec/obidos/ASIN/B000K0J8WG/ref=ox_ya_os_product

Obviously you need to exercise caution when live terminals are exposed.

A competent electrician will never use a neon screwdriver or a beeping volt stick to confirm if live! Besides being extremely dangerous if the components fail inside the neon screwdriver, neither will give a definitive indication of live conductors.

OP you should use a multimeter or a dedicated electrical tester if you have access to one.

homerhotspur

So, I took the wires out of the ceiling rose and put them in little distinct clusters. Unfortunately, the ceiling rose only had a very small hole above it through which all the leads were tightly jammed and it took quite an effort to remove it, in the course of which some of the clusters got moved around a bit.

Anyway, I have connected the new fitting - Live to the yellow(assumed switched live) and neutral to 2 of the (joined) black wires , held my breath and switched the mains on. The outcome is that neither the new bathroom light/ extractor fan or adjoining bedroom lights are working at all, but all other upstairs lights are ok.

I suspect this may be something to do with the light fitting (blue) to neutral (black) connection. Any suggestions please?

Rockingit

homerhotspur wrote: »

Any suggestions please?

Yes. As (sorry n' all) you are clearly not competent to do this, it's time to call in an electrician who is.

homerhotspur

Not in any way helpful, thanks, but if it makes you feel good.................

Myser

What are you using to check for live? Do you have a multimeter?

The live feed into the bathroom fitting isn't wired correctly or there is a loose connection in your new terminal block etc. Subsequently the other adjoining bedroom lights will not work.

Have a look at the diagrams posted above by others, they should help you work out which wires are for what.

homerhotspur

Thank you. I may have to go and get a new multimeter. I have never understood my old one and I am sure they have simpler ones now. I do have a new AC voltage tester which , when I tried it earlier, seemed to suggest that all the wires were ' live' even when the power was off so I have lost confidence in it.

I feel that the yellow must be the switched live based on the previous set up shown in my photo. I have therefore connected that to the new light fitting live wire, the neutral to all the blacks(and one blue) and all the reds and earths are where they were before. They all seem tight and secure.

Rockingit

homerhotspur wrote: »

Not in any way helpful, thanks, but if it makes you feel good.................

Just being a good MSE and trying to save your family the cost of a funeral, but if it makes you feel good.............

homerhotspur

Now as photo