You can, but most homeowners don't have a ammeter. I posted on another thread that I measured the condenser electric usage using an ammeter and got about 2.94 KW. The electric meter method gave me 3.21 KW. The difference would be the blower motor in the air handler.Originally posted by lynn rodenmayer
Can't you just clip your amp meter around L1 and do a little math to convert to watts, then to killawatts.