Loop ceiling lights - is this correct

[seasider]

Hi, we have some cable lights, two sets attached to the same switch. One set stopped working and an electrician looked and said the transformer needed replacing. The set was from 2008 and I couldn’t find the same model so just ordered two new cable sets, including transformers.

When looking at our existing wiring it is a loop with 3 mains cables. I looked up on loop wiring and from what I can see one should be from the switch, a feed in and feed out. The switch live should be sheathed so it is clear what it is. All 3 lives should go to the same connector and the earth cables should be terminated.

On ours the:
1. Switch live isn’t marked ( I think it is the blue neutral on the left of my pic)
2. Only two live browns go to the choc block. The other goes to the live on the light fitting.
3. Earths aren’t terminated anywhere, just cut short.

I’m going to call a professional to install the lights now, but for my own understanding, is this OK wiring, especially point 2? Or is it not safe?

Cheers

 

[EFLImpudence]

Firstly:

Hi, we have some cable lights, two sets attached to the same switch. One set stopped working and an electrician looked and said the transformer needed replacing. The set was from 2008 and I couldn’t find the same model so just ordered two new cable sets, including transformers.

When looking at our existing wiring it is a loop with 3 mains cables. I looked up on loop wiring and from what I can see one should be from the switch, a feed in and feed out.

Yes.

The switch live should be sheathed so it is clear what it is. All 3 lives should go to the same connector and the earth cables should be terminated.

Yes.
So why have you not done that?

On ours the:
1. Switch live isn’t marked ( I think it is the blue neutral on the left of my pic)

Yes, but see above re. neutral.

2. Only two live browns go to the choc block. The other goes to the live on the light fitting.

No. All three go to choc block as you said above.

3. Earths aren’t terminated anywhere, just cut short.

No they should be joined together - never cut them short.

I’m going to call a professional to install the lights now, but for my own understanding, is this OK wiring, especially point 2? Or is it not safe?

Might not be dangerous but the system would not work, would it?

You said everything correctly in the beginning and then for some reason did something else.

 

[seasider]

@EFLImpudence hi, thanks for the info this is the wiring the electricians did when we renovated the house and had it rewired in 2008. One set of cable lights stopped working earlier this year (worked since the rewiring) so looking at replacing now. All I’ve done is taken the light fitting/transformer down and seen the existing wiring doesn’t tally up with what I read on loops.

So system should not work from what you said but it was till this year so worries me if they’ve hacked something.

Cheers for info

 

[EFLImpudence]

Right, so is the wiring not as you said? - loop in, loop out and switch.
I missed that it is for two lights.

If it is just supply, switch and cable to another light then it would be correct.

Apologies.

 

[EFLImpudence]

You might like a couple of these or similar
- better than loose connectors in the ceiling:

Ashley J501 16A Downlighter Junction Box | Hager (J501)