Wire sizes when adding RCD to consumer unit

[TeeJay711]

Hi,

I am splitting the consumer unit to add 2off 63A RCD's.
What is the L+N cable size from the main 100A isolator to each RCD?

Tony

 

[telectrix]

depends on the load that the RCDs are feeding. 10mm or 16mm at a guess. think you'll need henleys.

 

[TeeJay711]

The board is in a 3 bed semi, single phase.
The usual
up lights
down lights
cooker
boiler
garage
alarm
kitchen

Why henleys, the RCD's just go on the buss bar!

Tony

 

[telectrix]

ah, your OP wasn't clear. you didn't say you were fitting RCds inside the CU. the tails in a CU are generally 16mm tri-rated cable.

 

[TeeJay711]

Nice one,

16mm it is then.
Thanks buddy

 

[telectrix]

you'll need the flexibility of tri-rated cable. crimps on the ends as well.

 

[trev]

Are you sure that there's enough space in there for 2 RCDs? It's probably easier to install a new CU rather than fanny on.

 

[oldtimer]

10 posts and your splitting a consumer unit plus you are asking a question that you should know the answer for so can I ask what skill level if any you are at ?

Wonder if we will get a reply

 

[robsparky1975]

How many neutral bars are there?

 

[robsparky1975]

Do you see where im going with that comment!

 

[trev]

Of course, I thought of that but decided ignorance might be bliss for the OP. Plus it would have been fun when he came to the next thread

 

[telectrix]

spoilsport. wanted to see what happened with 2 RCDs on 1 N bar.

 

[trev]

Would have been fun but he spoilt it for us.

 

[telectrix]

never mind. there's always the dyslexic rock star/drug addict, choked on his own vimto.

 

[MDJ]

Hi,

I am splitting the consumer unit to add 2off 63A RCD's.
What is the L+N cable size from the main 100A isolator to each RCD?

Tony

How do you like your steak cooked !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!