Maximum demand

[Ash1]

Hi guys, I'm looking to install a sub board to feed 4x 8.5kw shower circuits and 2x 2 ring 3kw hob circuits (4x32amp MCB's and 2x16amp MCB's). What would be the best method to work out the maximum demand? I get 83amps. Many thanks in advance.

 

[telectrix]

stick a 80A isolator/MCB after the DNO fuse/meter. that way any overload will mean a simple reset of the breaker and protect the 100A fuse.

 

[Guest55]

stick a 80A isolator/MCB after the DNO fuse/meter. that way any overload will mean a simple reset of the breaker and protect the 100A fuse.

80a fuse discriminate with a 100a fuse ?

not in a million years.

 

[telectrix]

80a fuse discriminate with a 100a fuse ?

not in a million years.

what i said was a 80A MCB. 100/1 should trip before a 1361 blows.