What is the primary function of a Bull/Company Switch?

The primary function of a Bull or Company Switch is to disconnect power from a system, ensuring that electrical systems can be safely serviced or maintained without the risk of electric shock or accidental re-energization. When a Bull Switch is open, it creates a physical gap that interrupts the flow of electricity, safeguarding personnel and equipment. This capability is crucial in electrical installations, as it provides a clear and assured means to isolate power sources before any work begins.

The other options do not accurately represent the primary role of a Bull Switch. For instance, while a switch can be involved in turning on or off power supplies and connecting circuits, its main purpose is to serve as a disconnection point for safety reasons. Regulating voltage is a function typically performed by voltage regulators or transformers, not by a Bull Switch, making it clear that its unique responsibility lies in power disconnection.