110v consumer unit

[bigspark17]

Hi, not experienced this before but i have a workshop where the 110v consumer unit (old wylex 3036 board 4way)
Do the board is fed from a 16amp sp mcb from a t0&n board. Then goes into. Standalone transformer wall mounted 3.5kva then into the cu and then to 4x 110v socket outlet.

Ive managed to source a (protek 110v double pole rcd) so i was going to arrange the new consumer unit in this order
2 pole 100amp main switch
30mA 110v 2 pole rcd
4x 16amp mcb
(All protek)

Thankd for any help/guidance

 

[westward10]

The mcbs need to be two pole.

 

[bigspark17]

The mcbs need to be two pole.

Thanks for the reply. Is this for isolation? The main switch is 2 pole.
What section of the regs guides this?
Thanks

 

[westward10]

No overcurrent protection.
Regulation 431.1.1.

 

[littlespark]

110V is really “2 phase” with a centre tapped earth… so only 55V from either phase to earth.

The breakers need to be double pole as there is no earthed neutral on each outgoing circuit for single circuit isolation.

 

[R-fur]

Do you have suitable test kit? not all RCD, ELI testers work on 110V CTE.

 

[westward10]

You can either make your own and take responsibility for it or use something built for the job.

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