Ceiling Rose low voltage

[RidleyRumpus]

I am trying to replace the hanging bulb light in my back room with a low power square ceiling light and when I have taken the ceiling rose off I have see this which seems very odd. There are 4 red wires going into the centre and three black wires going into the bottom connector together with the brown going to the light, top is one black in and the blue out to the light. Why so many wires?

I have reconnected up as is and when I turn the light on the low power square one does not turn on, I have used a MM on the outputs and it goes from 0V to approx 130v when on. There is only one light in this setup ie another is not turned on at the same time.

Any idea what is going on?

 

[EFLImpudence]

Electrics:Lighting Circuit layouts

www.diynot.com

You also have an additional fourth cable.

Your Brown and Blue are the wrong way round but it doesn't really matter.


What is a low power square ceiling light?

 

[pete01]

The wiring is pretty standard, feed in and out switch wire and a feed to somewhere else could be an outside light etc.

 

[RidleyRumpus]

Electrics:Lighting Circuit layouts

www.diynot.com

You also have an additional fourth cable.

Your Brown and Blue are the wrong way round but it doesn't really matter.


What is a low power square ceiling light?

One of these.

Why the low voltage?

 

[RidleyRumpus]

The wiring is pretty standard, feed in and out switch wire and a feed to somewhere else could be an outside light etc.

Any idea why the low voltage then?

 

[pete01]

Any idea why the low voltage then?

What are you measuring between Live and neutral?

 

[ericmark]

We can only guess, and my guess is wrong black wire used some where so you have ended up with two lights in series. When switched on to any other lights come on or glow or flash?

 

[Harry Bloomfield]

I have used a MM on the outputs and it goes from 0V to approx 130v when on.

Your MM is likely a high impedance one/ presents little load to the wire, so the MM is measuring voltage picked up from other wires which are actually live. In other words, the wire is not actually live.