This measures the consumption rate of a machine or process while it is actively running. Electricians use it to describe the amperage a motor pulls under load, while fabricators use it for the volume of gas consumed by a welding rig. Knowing the exact draw is necessary to size fuses, supply lines, and backup generators correctly so the system does not trip during peak demand.
Heard on the job
The startup draw on that compressor is tripping the 20-amp breaker every time it cycles on.
Insider tip
Always measure the draw under maximum load conditions, as the idle consumption is usually much lower.