What is a key feature of gang-operated switches?

A key feature of gang-operated switches is that they open all three phases simultaneously to prevent equipment damage. This characteristic ensures that during maintenance or outages, the electrical circuit is fully isolated, reducing the risk of phase imbalances and protecting connected equipment from voltage spikes or electrical faults.

By operating all phases together, gang-operated switches help maintain system integrity and enhance safety, particularly in three-phase systems commonly found in industrial and commercial applications. This feature is essential not just for the operation of the switch itself, but also for ensuring the reliability of the whole electrical grid connected to it.

The other options mentioned do not accurately describe the primary function or application of gang-operated switches. For instance, while a switch may assist in load management, reducing overall load on a transformer is not a direct function of gang-operated switches.