NCCER Electrical Level 2 – Control Systems and Fundamental Concepts (Module 26211-23) Practice Test

A pilot light is a small lamp used as a status indicator in electrical control circuits. It lights up when the circuit or a specific device (like a relay coil or contactor) is energized, giving a quick visual cue that power is present or a particular state has been reached. This helps technicians and operators verify operation at a glance without measuring with a meter. It’s not for storing energy, increasing signal strength, or measuring current—the purpose is simply to provide a visual indication of status. Pilot lights are chosen and wired to match the control circuit’s voltage and include proper current-limiting components so they don’t affect the controlling devices.