Split MCBs on consumer unit

[Mazak]

Hi all.
How would you split MCBs where there are two ring final circuits (so better separate them). There is one electrical shower (will be on 40A).
Any ideas?
TNS system.

 

[michaelw6]

Always put the most power draw next to the main switch. split them like said above! dont install them like you have in the picture though!
you need some spare spaces on both sides of the board.

 

[MJPD29]

Realistically if you don't know what your doing why are you messing with this

 

[brianmoooore]

If there's only one lighting circuit, what's the second 6A MCB?
The split is how I would do it, with the ring on the same side as the shower being the house ring, rather than the kitchen ring. This is to even out the load between the two sides, and is less likely to plunge the house into total darkness if the RCD on the lighting side trips, since there may be table lamps/ TVs on the house ring.
This won't comply with the current regs unless the fuse/cut out supplying this board is rated at no more than 63A. The LH RCD would have to be rated at 80A with a 40A and 32A MCB fed from it.

While on the subject, whose bright idea was it to choose 32A and 63A
as 'standard' ratings. 32A and 64A and you could feed two 32A MCs from a 64A RCD, or similarly two 30A MCBs from a 63A RCD.