Load calculations on three phase board

[Khanzada]

Costumer have 12 flats and need to feed for each flat a prepaid meter and consumer unit within the flat , the main supply to building is three phase , my question is how to distribute the load for 12 flats, each flat have a load of 63A.
Main supply is three phase .

 

[davesparks]

What exactly do you want help with here?

How you distribute the supply is via a suitable distribution board, I believe ryefield boards are the most commonly used for this application.

 

[Khanzada]

What exactly do you want help with here?

How you distribute the supply is via a suitable distribution board, I believe ryefield boards are the most commonly used for this application.

Thank you for reply.
I spoke to costumer to fit 12ryefield board with 63A fuses , but he bought it live three phase board with 125A main switch rating and 12 , 63A MCBs to make the cost cheaper.
My question is if I installed that it will be ok for load demand .

 

[nicebutdim]

What have the DNO specified?

 

[Khanzada]

What have the DNO specified?

He didn’t provide me with any info from DNO .

 

[westward10]

What does the design specification state.

 

[Khanzada]

What does the design specification state.

What does the design specification state.

each flat have a 8.5kw shower, 16A sockets, 32A cooker and 6A lights . I calculated it all load is 61.6A .

 

[nicebutdim]

As an apprentice my posts here should not be taken as advice, but as questions from someone who wishes to learn and what I'd really like to learn is how a 125A incomer might ever be considered suitable for a block of 12 flats?

Putting maximum demand to one side; if 4 residents happen to take a morning shower at the same time, that 125A incomer is going to be handling its full rated current before any other consumption is factored. If each flat were to draw an average 15A at any given time (not an unlikely situation), then the incomer is handling far in excess of its rated current.

 

[Khanzada]

As an apprentice my posts here should not be taken as advice, but as questions from someone who wishes to learn and what I'd really like to learn is how a 125A incomer might ever be considered suitable for a block of 12 flats?

Putting maximum demand to one side; if 4 residents happen to take a morning shower at the same time, that 125A incomer is going to be handling its full rated current before any other consumption is factored. If each flat were to draw an average 10A at any given time (not an unlikely situation), then the incomer is handling far in excess of its rated

As an apprentice my posts here should not be taken as advice, but as questions from someone who wishes to learn and what I'd really like to learn is how a 125A incomer might ever be considered suitable for a block of 12 flats?

Putting maximum demand to one side; if 4 residents happen to take a morning shower at the same time, that 125A incomer is going to be handling its full rated current before any other consumption is factored. If each flat were to draw an average 15A at any given time (not an unlikely situation), then the incomer is handling far in excess of its rated current.

As an apprentice my posts here should not be taken as advice, but as questions from someone who wishes to learn and what I'd really like to learn is how a 125A incomer might ever be considered suitable for a block of 12 flats?

Putting maximum demand to one side; if 4 residents happen to take a morning shower at the same time, that 125A incomer is going to be handling its full rated current before any other consumption is factored. If each flat were to draw an average 15A at any given time (not an unlikely situation), then the incomer is handling far in excess of its rated current.

Thank you for the information , because it’s three phase it will be 125 x 2 = 250A .

 

[nicebutdim]

Thank you for the information , because it’s three phase it will be 125 x 2 = 250A .

Would discrimination present an issue where 40A shower circuit is supplied from 63A MCB?