Define the function of an isolator switch.

An isolator switch serves a crucial function in electrical systems by providing a safe means to disconnect electrical circuits. This is particularly important during maintenance tasks or emergencies, as it ensures that no live current is present in the circuit while work is being conducted. By isolating the system, it significantly enhances safety for technicians and prevents possible electric shocks or accidents.

In practice, isolator switches help to control the accessibility of electrical systems, ensuring they can be fully de-energized before any repairs or adjustments take place. This feature is essential in adhering to safety protocols and regulations that require safe working conditions in environments where electricity is present. The proper use of isolator switches is a fundamental aspect of maintaining safe and reliable electrical installations.