What CSA is the Neutral conductor in this split load 17th CU unit

[freedomrun]

Had a look at a split load 17th edition RCD CU, quite new - one of the sides has a solid copper neutral that runs off to the Neutral bar on the DP isolator of the CU. Basically, due to a loose connection, a bit of Arking has gone on and made a mess. I want to put a new Neutral in to replace the damaged one - what is the CSA of the conductor used in these CU's (it's just a solid copper bar that has blue insulation and bends around the back of the MCB's) I want to replace it with some new cable, the DP switch is rated at 100A on the CU. I'm thinking it may be 16mm, just want some advice please. Also - would this just be a maintenance issue or should i issue a MW also?

 

[malcolmsanford]

Put some Tri rated 10mm on it. I would also ferrule this as well.

 

[freedomrun]

Could i not use some 16mm earth bonding and put blue sleeve on it ?

 

[malcolmsanford]

If you wanted to yes, don't you have any 16mm blue tails?

 

[freedomrun]

I've plenty of 16mm CPC, seems silly going to buy more copper when only the insulation colour is different, I have 25mm tails, no 16mm in blue at the mo.