Over rated main cut out fuse or not?!

[ukpablo]

cheers bud, did this but took off biggest fuse, multiplied the rest by 0.4 and added biggest fuse back on.
this is what the board had connected

6A lights
6A lights
32A radial for panel heaters
32A cooker(3KW)
32A hob (3KW)
32A ringmain
32A ringmain
16A water heater
16A skts radial
40A shower (9.5 KW)
16A whirlpool bath

total was 128A
main switch was 80A
main fuse was 60A.

thanks anyway

also connected was 6 x 16A mcb on seperate board for storage heaters........did not calc these.

 

[malcolmsanford]

Those 2 cooking units are interesting if they are 3KW they can be plugged into 2 x 13amp single sockets so those 2 X 32amp supplies are well over the designed.

You could change then to 2 x 16amp breakers to bring the installation right down

 

[ukpablo]

yea, but dont want to mess with ccts that im not getting paid to install etc! could open up a can of worms for myself, plus they are on opposite ends of the kitchen, which has just been done by somebody else!

plus thats only a guess, plugged clamp meter onto main incomer with only those two appliances on full............was drawing 30 ish amps.

6.9kw after calc