Multi CU's off 3 phase DB cable size

[Adnan]

Hi

I'm new to the electrical trade. Re-wired a few domestic property's and done odd few fault finding jobs. Today I came across a job, converting a 6 bed house into multiple flats (passed it on to a more qualified/experienced electrician).

Just out of curiosity now, If I was to supply single phase to each consumer unit off the 3 phase board, would the supplied cable to the consumer unit still be 25mm if in total it had 3 circuits of total 78A (ring,light,shower)??

Thanks in advance

 

[LeeH]

What did the spark who you passed it to say?

 

[D Skelton]

What's wrong with 16mm?

 

[44ALLAN]

lol.................................................

 

[Engineer54]

What did the spark who you passed it to say?

I think he'd probably say, ....Thank you very much!!

 

[Knobhead]

A one bed flat…….. A bit of 16mm is more than enough.

I’ve posted this before on here. I have a one bedroom flat. OK the heating and cooking are by gas. I installed a 6A RCBO and reversed the supply through it. For a week it never tripped. My actual electricity consumption could be handled quite happily by a 1.5 T+E.

 

[Adnan]

I'm taking a cut off the electrician I've passed it onto .. I like to do things correctly and this landlord has a few more property's he wants to do the same! After I've finished a rewire I'm on at the moment, I'll be covering the other houses. I'll have a better view on what needs to be done because I'll be having a look at this electricians work as he progresses. (I like to walk before running)!.. Thank you D Skelton and Tony