What size disconnect fuses are needed for a 480 volt 3 phase disconnect?

The size of disconnect fuses for a 480-volt 3-phase disconnect depends on the full-load current of the connected equipment and the type of load (e.g., motor or non-motor). Generally, for motor applications, fuses are sized at 125% of the motor's full-load current, while for non-motor loads, they can be sized at 100% of the full-load current. It's essential to consult the National Electrical Code (NEC) and the equipment's specifications to determine the appropriate fuse size for safety and compliance. Always consider any local codes and practices as well.