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Re: odd occurrence
Posted: Thu Oct 10, 2019 9:24 pm
by JPG
The wiring between the gfci and a receptacle fed by it MAY have sufficient inductance to prevent the circuit imbalance currents to be above the threshold of the gfci.
Realize a gfci does not sense currents to ground directly, butrather by detecting a current difference between the two line supply conductors.
Re: odd occurrence
Posted: Fri Oct 11, 2019 1:12 pm
by chapmanruss
In my case all outlets down stream of the GFCI outlet are protected on each circuit. They are wired in series so if the GFCI is tripped at any outlet on a circuit all outlets on that circuit are off.
Re: odd occurrence
Posted: Fri Oct 11, 2019 6:08 pm
by Hobbyman2
In my case all outlets down stream of the GFCI outlet are protected on each circuit. They are wired in series so if the GFCI is tripped at any outlet on a circuit all outlets on that circuit are off.
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That's how I had the kitchen at the rental wired in. instead of removing the yellow tape and running the current for the next plug through the plug before it,,, using pig tails / jumpers from the line current to the gfci will allow them to operate separately in a parallel circuit.if you run the current through the first plug the others do not need to be gfci and will still be protected .
Re: odd occurrence
Posted: Thu Mar 03, 2022 5:40 pm
by Matanuska
wa2crk wrote: ↑Tue Oct 08, 2019 3:11 pm
Had an odd occurrence with the Power Pro yesterday. I sanded a few pen blanks square and did a few other jobs and when I tried to use my bench grinder it would not start. Checked the drill press, no start. Then I saw the red light on the GFCI outlet was on. I tried to reset it and it would not reset. I unplugged the PP which was turned off at the headstock switch, and the breaker was able to be reset. Plugged the PP back in with the main switch off and the breaker tripped. Unplugged the machine and ohmed out the plug and did not see reading that would cause the breaker to trip. I plugged the PP into another circuit that was also GFCI protected and the machine worked OK. Then plugged it back into the original plug and tripped the breaker. I left the machine deciding to inspect the wiring later. Later came, and I plugged the machine back into the original outlet and all things were normal. Have not checked further because I had to use the machine, but I plan to check the wiring later. I may change the GFCI outlet just in case it has gotten flakey.
Bill V
Here's a heads-up regarding PowerPro GFCI trips while plugging in the machine. My PowerPro started doing this occasionally and I ignored it because others had reported similar issues. Then while plugging in the machine a few days later I heard a loud electrical pop from within the headstock which threw a breaker. I took the headstock apart and found that the black and white conductor wires at the end of power cord that plug into the switch had gotten trapped & flattened where they wrap around the spindle lock assembly and were shorting out. I cut off the damage portions, installed new connectors, and re-routed the wires taking care to stay well away from the pinch point. Problem solved. Since the fix I've had zero GFCI trips when plugging in the machine so in this case it looks like the GFCI was actually doing what it was supposed to do as the intermittent pinch on the wires worsened with time.