I'm trying to measure the current required by my refrigerator. I bought a 10 watt 0.1 ohm resistor and spliced it into one of the wires (not the ground wire) in a short 14 ga. extension cable to the refrigerator. I'm guessing that the refrig requires about 8 amps, so the voltage cross the 0.1 resistor should be about 1 volt. But when I try to measure it, my voltmeter doesn't register anything (and the refrigerator is indeed powered by the extension cord). What am I doing wrong? Or is there a better way to meaure the current (besides buying an expensive AC current measure gauge)?