PVC-insulated cables have lower heat resistance than XLPE-insulated cables. 3. Calculate Voltage Drop
As electricity travels through a wire, some energy is lost as heat due to resistance. This is called . If the voltage drops too much, your equipment won't work correctly. how to calculate cable size
: 400V three-phase, 50 kW motor, ( \cos\phi = 0.85 ), efficiency 0.94, length 120m, PVC insulated copper cable, clipped direct to wall (Reference Method C), ambient 40°C, grouped with 3 other circuits (4 cables touching), prospective short-circuit 10 kA, permissible voltage drop 3% (12V), disconnection time 0.4 sec. 50 kW motor