1.
I want to install water heater 8kW, separate circuit. Do I need put a switch between Fuse board and water heater?
2.
another problem - 14kW water heater 3 phase,
this is 21A, how to find right fuse? in 17Th edition there are values for U=230V,where to find max earth fault loop impedance (Zs) for circuit breakers with U=400V
I want to install water heater 8kW, separate circuit. Do I need put a switch between Fuse board and water heater?
2.
another problem - 14kW water heater 3 phase,
this is 21A, how to find right fuse? in 17Th edition there are values for U=230V,where to find max earth fault loop impedance (Zs) for circuit breakers with U=400V