Maximum demand exceeding main fuse. Discussion ThreadMaximum demand exceeding main fuse. Electrical Advice
I've got a customer who currently has a 60A main fuse running in 10mm tails to a board with breakers 32/32/20/6/6A which, doing the diversity calc at biggest breaker + 40% of the rest comes in at 57.6A, just about OK.
She wants a new 32A cooker circuit, so I said she should get the tails upgraded and the main fuse increased, but this would involve pulling up her newly-varnished floor so she's said no.
If I was to down-rate the breakers to 32 (for the new circuit) then 20/20/16/6/6 the calc. still comes in at less than 60A (59.2). Can you see any problems with this? Or do I this time have to forget the easy calculation and go round counting sockets and appliances instead?
Any advice welcome!
Maximum demand exceeding main fuse. for the original thread on Electricians Forums
I've got a customer who currently has a 60A main fuse running in 10mm tails to a board with breakers 32/32/20/6/6A which, doing the diversity calc at biggest breaker + 40% of the rest comes in at 57.6A, just about OK.
She wants a new 32A cooker circuit, so I said she should get the tails upgraded and the main fuse increased, but this would involve pulling up her newly-varnished floor so she's said no.
If I was to down-rate the breakers to 32 (for the new circuit) then 20/20/16/6/6 the calc. still comes in at less than 60A (59.2). Can you see any problems with this? Or do I this time have to forget the easy calculation and go round counting sockets and appliances instead?
Any advice welcome!
Maximum demand exceeding main fuse. for the original thread on Electricians Forums
