Before increasing any aircraft electrical load, what should be checked first?

Before increasing any aircraft electrical load, it is crucial to check the wires, cables, and circuit protection devices. This step ensures that the electrical system can handle the additional load without risk of overheating, short-circuiting, or causing electrical fires. Wires and cables must be of sufficient gauge and integrity to carry the current without excessive voltage drop or damage due to thermal effects. Additionally, circuit protection devices such as fuses or circuit breakers must be verified to ensure they are rated for the increased load and functioning correctly.

This precaution helps prevent potential hazards and ensures the overall safety and reliability of the aircraft's electrical system. Conducting this check first allows for a thorough assessment of the electrical system's capacity, which is critical when considering any increase in load.