Lighting circuit question

[skilly]

My parents are moving house shortly and when I went to fit a new light fitting I found the following in the ceiling rose:


2 Black wires connected to Neutral of the lampholder.
1 YELLOW(?) wire connected to the live of the lampholder.
1 Green/Yellow earth cable.


The light switch has 2 reds (common) and 1 Yellow switch wire.


Is it ok to use a yellow cable as a switch wire?? also the house has apparently been rewired in the last 6 weeks.



Thanks in advance.

 

[davy_owen_88]

Are the lights ELV? 12v? If not, it is not permissible to use a yellow core as a phase conductor, unless it is appropriately sleeved brown.

If the house was rewired recently then you should be finding cables with the the new cable colours (brown and blue).

 

[RF Lighting]

Just a stab in the dark here, but is the light fitting in the bathroom?

The yellow might be a switched live from an old colours 3 core and earth cable?

 

[skilly]

Thanks for the quick responses.


The existing fitting is a normal 240v pendant fitting, in the kitchen. But I have also opened a couple of other roses in other rooms (not the bathroom though) and found the same yellow switch wire. I can't ever remember seeing a yellow wire in a domestic system before.


The lighting cables appear to be singles (i.e not T&E or 3 core) housed in metal conduit.


Like I say the house has 'apparently' been rewired in the last couple of months and I would have expected to find Brown/Blue all aver the place but the sockets are still Red/Black (with the exception of the kitchen).


It looks to me that the council have just rewired the kitchen and fitted new sockets, switches and roses everywhere else.


I will need to have a look to see if there is a dual system warning sticker on the consumer unit though as I don't remember seeing one yesterday.



Once again thanks in advance.