Help - new light fitting

homerhotspur

Trying to wire up a new light fitting. Ceiling rose with 2 white wires coming out of each end of terminal to existing lamp holder( simply 2 unmarked terminals) So, I now have a new ceiling fitting which has a terminal block with blue and brown neutral and live wires. How do I connect these to the 2 white wires coming out of the existing ceiling rose? It seems that all the important stuff is already in place within the ceiling rose and these 2 white wires were just attached to the old lamp with no distinction between live and neutral. When I have replaced fittings in the past , it has always been easy to spot the coloured wires and attach to the new fitting but this seems different. Thanks!

homerhotspur

Update - The 2 white wires ( from the lamp holder) are attached to each end block of the ceiling rose terminal. In the joining block at one end is a black wire and the other end is a yellow one( not yellow and green). Does this help with any advise please?

C_Mababejive

Im surprised there arent three cables in the ceiling rose. Howver no matter. One pair of these wires will be the light switch. If you cannot visibly discern which pair it is,then a test meter would be of use. It might be better to seek local advice. Many diy'ers have great difficulty with whats in ceiling roses as they dont understand whats going on.

C_Mababejive

PS..the only thing you need to know is that the blue/brown of your new light fitting goes in the same terminals as the blue black of the old ceiling pendant you have presumable removed.

osdset

There is no distinction between live and neutral on light bulbs they can be connected either way.



In this picture the two wires from the light bulb are coloured blue and brown but it does not mean that one is live and one is neutral, it's just the standard colour code.
So long as you make sure you connect the wires to the two outer terminal blocks on the rose, neutral and switched live as above you will be ok.
Don't forget to connect the earth cable if your new light fitting is metal.

homerhotspur

Many thanks - light is working BUT I now have another problem:embarasse

The Ceiling rose is incompatible with the new (flush) fitting which cannot be attached to the ceiling. What do I do now? Can I make a bigger hole in the ceiling and push the rose up into the space above( probably not). If not, what electrical bits will I need to purchase. Thanks again.

Myser

If the wiring is very old and there is no earth, the yellow may be the switched live connection or the light may have two-way switching.

The light fitting is probably Class II and doesn't require an earth connection.

You will need to remove the existing ceiling rose to flush fit the new light fitting.

C_Mababejive

homerhotspur wrote: »

Many thanks - light is working BUT I now have another problem:embarasse

The Ceiling rose is incompatible with the new (flush) fitting which cannot be attached to the ceiling. What do I do now? Can I make a bigger hole in the ceiling and push the rose up into the space above( probably not). If not, what electrical bits will I need to purchase. Thanks again.

Normally if fitting a new light fitting, you would power off having ascertained what all the wires do. Remove the old ceiling rose completely, make up your connections on a connector block/chocolate block then usually just push it through the plasterboard so that it sits in the ceiling void and attach new lightfitting with screws supplied through plasterboard into wood batten which hopefully will be in place already

homerhotspur

Thank you, that was the sort of reply I was hoping for as it was what seemed most logical and straightforward to do!

I will need to get some kind of fittings and have been looking at various items - e.g WAGO connectors and various junction boxes.

Would you say a simple connector block is sufficient or should this be somehow encased in a box of some sort?

Myser

You can use Wago connectors or a suitable terminal block enclosure for lighting. Don't just tape up any terminal blocks or leave them exposed!

ValHaller

C_Mababejive wrote: »

Normally if fitting a new light fitting, you would power off having ascertained what all the wires do. Remove the old ceiling rose completely, make up your connections on a connector block/chocolate block then usually just push it through the plasterboard so that it sits in the ceiling void and attach new lightfitting with screws supplied through plasterboard into wood batten which hopefully will be in place already

While that will work, it is entirely a bodge. It is quite undesirable to do a chocolate block connector for the ceiling void between floors. It is completely unacceptable and potentially dangerous for a connector which goes into an accessible loft space