New consumer unit -I think I've done a very simple 'stupid' - help please.

[buzzlightyear]

I've just swapped out an old consumer unit for a new one - like for like in terms of circuits.
One lighting circuit will not set.

I've disconnected the earth on that circuit and it still won't set so I would appear to have a live-nuteral short.

However I did nothing to that circuit at all during the change over.

I've tried connecting the circuit to a different Rcd it still won't set.

I have also examined the cable at the Unit to check it's not been damaged.

What 'stupid' might I have done?

only you can answer that ,next .

 

[Rpa07]

@mattg4321 LOL!

 

[buzzlightyear]

this might suit him .