Broken CPC on Lighting Circuit

[briefcasedan]

Someone will have designed this installation with the number of circuits it has, to then reduce the number of circuits by joining them together seems like a bad idea.

Without seeing the installation and understanding what is on each circuit and why it's very hard to offer any other advice than to repair or replace the damaged cable.

It's been very badly designed with approximately 4 lighting circuits doing only 2 rooms each.

Sounds like my best bet is too run a new cable from the CU no matter how diificult

 

[Spoon]

It's been very badly designed with approximately 4 lighting circuits doing only 2 rooms each.

Are these 4 circuits coming back to individual breakers?

 

[littlespark]

What is the wiring method?
If T&E, then I would expect a break in the cpc to be next to a break in the L or N.

Likely just a loose connection somewhere accessible (fingers crossed)

If each circuit is only doing 2 rooms, then, why not extend one of the other circuits to pick up whats affected by the break?
You'll just have to ensure that all old cables that are now redundant are stripped out as much as poss.

 

[briefcasedan]

Are these 4 circuits coming back to individual breakers?

Yes that's right

 

[davesparks]

It's been very badly designed with approximately 4 lighting circuits doing only 2 rooms each.

Sounds like my best bet is too run a new cable from the CU no matter how diificult

In that case maybe joining the affected lights to another circuit would be a viable soloutiin.

 

[Toneyz]

Have you done an insulation resistance test and proved it's not a fault by a nail or screw or a joint box somewhere and the cpc has come out of the connection?