Why is a guarded switch used in aircraft systems?

A guarded switch is specifically designed to prevent inadvertent operation of critical systems in aircraft. This is particularly important in aviation, where accidental activation or deactivation of a system can lead to serious safety issues or operational failures. The guarding feature usually involves a physical barrier or a protective cover that must be lifted or moved before the switch can be activated. As a result, it adds an additional layer of safety by ensuring that only intentional actions will operate key systems, reducing the likelihood of errors during normal operation or high-pressure situations.

While operational efficiency, signaling operational status, and increasing electrical capacity are important attributes in aircraft system design, they do not pertain specifically to the primary function of a guarded switch. The key purpose is fundamentally about enhancing safety by controlling access to critical functions.