said by iLearn:
Thanks leibold and LazMan.
@ leibold - I wanted some clarification, you said 'differential in current between hot and neutral', do you mean differential in voltage instead? I am saying this because as far as I know, the neutral carries the different between the current coming in through hot and the amp (current) used by the resistance (a bulb for example). So the current flowing through the neutral will always be less than the hot wire and the GFCI will always trip, correct?
Sorry, I am just trying to get my basics right.
Think of voltage like the water pressure on a pipe system and current as the amount of water flow. The voltage (pressure) pushes the water (electricity) through the pipes (wires) but the flow (current) is the same no matter which of the series connected pipes (wires) you measured it.
Now, if the pipes should spring a leak, then the one supplying the water (electricity) will have more flow (current) than the one "downstream" (past) the leak. That leak will be bleeding off some of the flow (current) that was supposed to run through the pipe (wire). The flows (currents) in the pipe (wire) supplying the system won't balance with the flow (current) in the pipe (wire) carrying the flow (current) away.
In no case does the total pressure (voltage) really enter into it, that's what makes the flow (current) happen, but whether the leak is there, or not, the pressure (voltage) won't change much.
Does that help, or make it worse?