I am trying to use a Spare Core to detect when a pump receives power from an outlet. The pump draws about 6A. I do not need to measure the amount of current, just know when it’s switched on or off. The outlet is controlled by another controller that I do not want to disable or disturb in any way. I also do not want to disturb or directly connect to the circuit being monitored.
So I’ve been reading threads about clamp-on current sensors like the CR2550 or the SCT-013-005.
Do I just need one of these to clamp on the AC power cord, connect it to pins on the Spark, and that’s it for hardware? Seems deceptively simple… I want to be sure this route is 100% isolated from the circuit and the mains.