Electrical Engineering/fla vs amp


JRL wrote at 2012-11-30 21:53:43
Since FLA is "full load amps" - it will 'pull' 20 Amps only when run with a maximum (recommend) load. If the motor is running (ie. spinning), but there is no 'load' (ie. restance to spinning), then it will pull less than the FLA amount - likely much less than 20 Amps. Image a circular saw that isn't cutting anything. A small 'load' requires a small amount of power. Think of the circular saw cutting through thin, soft piece of wood. A big 'load' require more power. Think of the same saw cutting through a thick piece of hardwood. In many cases, the motor should have a fuse that will shut-off the electricity if the motor starts to 'pull' over 20 Amps. The only way to really know how much power your motor actually uses is to put a meter on it.

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