Spur

[m4tty]

Hi,

Got a job coming up where fuseboard is old with no rcd protection and cant get an rcbo to fit old board.

Option which is probably best is split tails, new 2 way rcd mainswitch board with new circuit for 4 sockets in kitchen.

Question is can the new board be fed from a spur off the downstairs ring final mcb. It dont feel right but thought id ask your opinion on this

Cheers

 

[Andy™]

just fit an RCD outside the CU, connect circuit to that and a bit of 6mm to existing fuse

but you cant wire a new board from the sockets

 

[Sidewinder]

just fit an RCD outside the CU, connect circuit to that and a bit of 6mm to existing fuse

but you cant wire a new board from the sockets

Why Andy?

 

[m4tty]

Its only 2 x 32a and 2 x 6a circuits in board. I was talking of spurring from one 32a mcb ?

 

[Sidewinder]

If you are taking a spur from the MCB, then protecting it suitably then go for it.

 

[ProDave]

Fit new sockets to existing ring. Then add stand alone double pole rcd in 2 module box.  Now all sockets (on that circuit) have rcd protection.

Cheaper and smaller than a new 2 module rcd board and offers more of an upgrade.

 

[Sidewinder]

^That's another option TBH.

 

[SLIPSHOD & SLAPDASH]

How much more time & money would it be  to fit one larger board, much better job  and probably no bonding either ?

I would prefer not to have all the sockets in the property on one circuit/rcd as suggested above.

Edit last comment, didnt notice 2 x 32A

 

[Evans Electric]

 M4tty, its a bit unusual to feed a 2 way board from the ring main MCB ,  a spare 40A  would be somewhat better  . 

Whats the problem with splitting the tails in Henley Blocks and then add your new 2 way  RCD board .    For a few more quid the old board could be changed.  

What we used to do in these cases was take out the up & down lights , stick them in a 2 way board fed from a 30A fuse and use the other ,now spare way for a shower / cooker . new ring . 

I'd go with the split tails if it were me TBH    assuming they don't want to pay for a board upgrade. ?