A 3Ø safety switch rated at 600 volts can be used as the disconnecting means for which of the following motors?

A 3-phase safety switch rated at 600 volts can indeed be used as the disconnecting means for motors operating at various voltages, including 208 volts, 240 volts, and 480 volts. The key point here is that the safety switch's voltage rating defines the maximum voltage it can handle. Since 208, 240, and 480 volts are all below the 600-volt rating of the switch, it is suitable for disconnecting those motors without risk of overloading or damaging the switch.

In electrical systems, disconnecting devices should be appropriately rated for the loads they serve. A safety switch rated above the motor's operating voltage ensures that it can safely interrupt the circuit without risk of failure. Thus, any of the specified motor voltages can be utilized with the 600-volt safety switch, making it a versatile choice in applications where different voltage motors are used.