Ceiling rose too many wires?

[ban-all-sheds]

Could it be achieved by using a terminal block instead? If it's a case of there not being enough terminals in the existing rose?

• //www.diynot.com/wiki/Electrics:Lighting
  
• http://www.google.co.uk/search?q=uk+lighting+wiring+(basics+OR+101)
  
• //www.diynot.com/wiki/Electrics:books
  
• //www.diynot.com/wiki/Electrics:index

 

[securespark]

The ryb cable is for a burglar alarm is believe after chasing he wires.

Why would a burglar alarm need a switched live from a light?

Because some panels, notably the ADE Accenta, have a facility for switching some lighting on in alarm condition.

The installer could have taken a permanent live and neutral for the panel, along with a switched live to connect to the lighting output.

 

[PrenticeBoyofDerry]

It may not be a big job, but it also may!
If you have inherited a historical problem, they maybe a reason why you have what you have. I would personally stump 100 Great British Pounds and hopefully the electrician is as good as his/her word!

 

[securespark]

If you are certain about the 3 core feeding the alarm panel, it must have sounded off by now as the panel will not have power the way the 3 core is connected now.

Alternatively, the 3 core could be feeding the second switched fitting: red=L blue=N yellow=SW L.

Sometimes I have taken a three core to fittings with a permanent live in case I need to extend in the future.

To advise further, you need to post pictures of the wiring in the other rose and the switches.