Definition
The current drawn by an electric motor when it is running but not driving any mechanical load. This current overcomes only the motor's internal friction, bearing drag, and magnetic losses, so it is much smaller than the current the motor draws when working against a load.
Plain English
How much electricity a motor uses when it is spinning freely with nothing attached to it. The motor still needs a little power just to keep itself turning, and that small amount is the no-load current.
Context Anchor
Seen in aircraft electrical-system maintenance, especially when checking motors, electrical accessories, and power supplies for normal operation.
Derivation
No-load' literally means 'without a load attached.' In electrical work, 'load' refers to whatever the motor is doing work on. So no-load current is simply the current measured when the motor is running but doing no useful work.
Why Pilots Care
Helps identify excessive battery drain or internal faults in electrical components before they affect flight systems.
Analogy
A fan uses some electricity just to spin freely in the air. If you make it push against something, it uses more. The free-spinning amount is like no-load current.
Intuition Check
No-load current does not mean zero current. “Current” here means electrical flow, not wind, water, or something happening now.
Example Sentence 1
After replacing the fuel pump motor, the technician measured its no-load current to confirm it matched the manufacturer's specification.
Example Sentence 2
A higher than normal no-load current reading pointed to a possible short in the wiring harness.