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I have an GFCI outlet box wired with yellow coated wire, which I believe goes to a dedicated circuit breaker. When I turn off the breaker to the box, I still read residual voltage. Is this induced "phantom voltage"? Is it safe?
This outlet box is underneath a jetted tub, so I want to be sure there is no voltage in the box when I turn of the circuit breaker.
The 3 tools I used to measure the voltage are:
1) Gardner Bender GDT-3190 multimeter (10 MOhm input impedance) - when pluged in to outlet hot and neutral, multimeter reads 2.1V on 200V AC setting.
2) Klein Tools NCVT-2 proximity Voltage Tester - when close to the yellow wire, tester beeps for voltage reading on 12-48V scale, but not for 48 - 1000V scale.
3) SPERRY GFI6302 outlet tester - reads open hot, so not picking up any voltage.
Thanks for the help!