What is the cable size needed to run 400V 50H 185KW delta motor?

To determine the cable size for a 400V, 50Hz, 185kW delta motor, you first calculate the full-load current using the formula: I = P / (√3 × V × PF), where PF is the power factor (typically around 0.8 to 0.9 for motors). Assuming a power factor of 0.85, the current is approximately 245A. You would then refer to local electrical codes and standards, such as the NEC or IEC, to select an appropriate cable size that can handle this current while considering factors like ambient temperature and installation conditions. Generally, a cable size of around 50mm² copper or 70mm² aluminum may be required, but always check the specific regulations and derating factors for your installation.