Lighting wiring help

[Jay19922]

Hey guys just wondering if anyone could help

I took a light down in my house today and the ceiling Rose was crumbled and cables literally fell out as I touched it

I had to put them on connector blocks

I have 3 cables coming in to the ceiling rose

I connect all cores on connectors separately I have found that the supply goes directly to this light

Therefore have found this is perm live and neutral

I now got 2 cables coming in

I have an other light in the room if I connect a live to my perm the other light comes on through the switch therefore I've found my live and neutral on this one too so connect it directly to the perm live and neutral

Am I right so far?

Lastly one cable left red blue and earth , I connect the red to the perms it trips I connect the blue to the perms it also trips ? Surely one of these would be taking supply to the switch and one back up?

Also before testing etc the cables were just put together assuming they were right it tripped and the switch will not switch , would this even be a case of it tripping on the last cable?

Thanks in advance guys please tell me if I'm doing anything wrong

Thanks again!

 

[sparkwright]

The thing you are doing wrong is not connecting the wires as they were.

Why haven't you copied the way they were wired before?

Brass terminals don't crumble, so it's easy enough to see where each wire goes.

Have you any notes or photos of how it was wired?

 

[securespark]

You sure it is red and blue?
You need a multimeter to test reliably.
On continuity setting and attached to the switch cable, the MM will alternate open/ closed circuit when the switch is operated several times.

 

[Jay19922]

Unfortunately not the plastic crumbled and 2 Cables popped out as they must of been loose

I have switched the mains on and I've got the supply at the light which eliminates one cable as that's the supply
But the other two I can't get to grips with

I connect one and the other light comes on but the other one when connected just trips

 

[securespark]

The one that is tripping...is that the one that is red and blue?

 

[Jay19922]

You sure it is red and blue?
You need a multimeter to test reliably.
On continuity setting and attached to the switch cable, the MM will alternate open/ closed circuit when the switch is operated several times.

Yes it is blue and red I also found this strange one new and one old colour

I have a continuity voltage tester

What would the best approach be ?

 

[Jay19922]

The one that is tripping...is that the one that is red and blue?

Yes it is when connected to perm live (either red or blue) they both trip

Wouldn't one be perm and one switch though ? Unless the other cable is connected wrong

It doesn't trip if these two are connected separately with other 2 cables connected perm live and neutral

 

[securespark]

Forgive me but I cannot understand your last sentence.

 

[securespark]

Red and blue is an odd combination in a pair. Is there a yellow or white one with them in the same sheath?

It could be that they are connected to neutral which would trip if you joined them with the line loop.

Have you replaced any other fittings or switches or disturbed any other connections on this circuit?

 

[Jay19922]

Forgive me but I cannot understand your last sentence.

Okay so the perm live and netural from the board are on connectors

The other cable is also connected perm live and netural (this brings the other light one )

So these 2 cables are connected together on connectors 2
Perm live and 2 neutrals

The last cable both red and blue are on their own connectors , I switch the supply on and nothing trips ,
As soon as the red or blue are added to the perm it trips

 

[Jay19922]

Forgive me but I cannot understand your last sentence.

Okay so the perm live and netural from the board are on connectors

The other cable is also connected perm live and netural (this brings the other light one )

So these 2 cables are connected together on connectors 2
Perm live and 2 neutrals

The last cable both red and blue are on their own separate connectors , I switch the supply on and nothing trips ,
As soon as the red or blue are added to the perm it trips

 

[Jay19922]

Red and blue is an odd combination in a pair. Is there a yellow or white one with them in the same sheath?

It could be that they are connected to neutral which would trip if you joined them with the line loop.

Have you replaced any other fittings or switches or disturbed any other connections on this circuit?

It is a very odd combination

After this problem I changed the other light in the room and had no problems at all it worked I swapped cable for cable which I didn't do on the first one with the cables poping out

The only thing is the switch is broke after it tripped would this affect anything ?

I haven't got a fitting attached only connectors on the cables to the one with the problem

 

[securespark]

Then there is either a fault on that part of the circuit or you are connecting it up wrong. You really need a MM to proceed. Has the red blue cable got another coloured wire in it?

 

[333rocky333]

is it a 2 gang switch
Have you double checked for the missing yellow cable
Possiblywrongly connected to earth !!

Not sure you will find a white cable as securespark said

 

[Jay19922]

Then there is either a fault on that part of the circuit or you are connecting it up wrong. You really need a MM to proceed. Has the red blue cable got another coloured wire in it?

There's no other colour in the cable just a 3 core red
Blue and earth

Worked perfectly before taken apart I just don't understand what I'm doing wrong

With the 2 cables connected together (supply from board and cable to the other light connected together)

The red and blue on separate connectors the other light works fine and nothing trips I can't understand how it trips when I add either cable to the circuit