I borrowed a clamp on current meter from my company to take DC current measurements at home and decided to poke around at AC lines.
Initially I was reading zero on AC power cords and quickly realized +i -i =0 - unless of course I can break into one of the lines to measure the current.
During random testing I noticed one of the AC lines near the circuit breaker box has 0.40amps. Obviously something in the house is draining current to Earth ground.
That's a home repair waiting to happen, however, I have a question about these meters because now I'm interested in purchasing one.
Are there any that will measure an AC power cord and give you the current it's drawing or does every meter cancel the +i and -i ?