Wylex consumer unit - Fitting a second RCD?

[EddyP]

I've got the following consumer unit, which i'd like to use as part of my extension, its a split load but with a single RCD, every circuit needs RCD protection as they're not more than 50mm deep in the walls.
I'm not sure how to add a second RCD, is it ok to just put two cables into the main switch? and then cut the bus bars to fit? I can afford to drop a couple of MCBs out to give room for the RCD, I would like to keep one MCB without RCD protection for the smoke/security alarm.
Or should I just buy one of the 17th edition consumer units with two rcds already fitted?

Thanks

 

[Taylortwocities]

It is possible to double up the conductors in the main switch but rather messy.

Why not use RCBOs in the non-RCD side?

 

[EddyP]

It is possible to double up the conductors in the main switch but rather messy.

Why not use RCBOs in the non-RCD side?

It is messy, hence me asking if there are any alternatives I don't know about.

I could use RCBOs but by the time i've bought 5 or 6 of them I probably could have bought a dual RCD consumer unit thats already populated.

 

[streetlighter]

Using RCBOs is better than a dual RCD split board.

 

[RF Lighting]

I hope you're going to earth the armour of those two cables

 

[Taylortwocities]

The board you have got needs anoth neutral bus to make it a better job.

As you say, the other alternative would be to buy a skeleton 17th board and then populate it with the bits you've already got. (plus another RCD).

 

[EddyP]

Was just in screwfix, and they had a wylex dual RCD board on offer, so thought i'd get it as I can always take it back if I can mod this one.
Very interesting, the insides are identical to the one above, they just put a pair of tails into the same terminal on the main switch, then use slightly different bus bars. I may as well modify the one above copying how they've done it in their 17th board.

RF - Yes the armours will be earthed, just havent done that bit yet.

 

[AndyPRK]

is it possible you could post a picture of the new unit.

I need to do the same as you.

Thanks