Current is the effect, voltage is the cause. Current cannot flow without
voltage.
If you have a leakage of the current or another parallel path, the voltage will
drop causing increase ampere, there will be a differential of ampere and
voltage, thus different current effects.
You can either use a voltage relay or a current relay that detects the under
voltage or over current of circuits which can disconnect the circuit.
We normally use program devices on large transformers installation that detects
phase loss and current faults.
Roland
----- Original Message -----
From: Robert Bruninga via EV<mailto:[email protected]>
To: David Nelson<mailto:[email protected]> ; Electric Vehicle Discussion
List<mailto:[email protected]>
Sent: Tuesday, October 06, 2015 8:04 PM
Subject: Re: [EVDL] OEM EV charging on 120V with no ground?
Correction:
> If either the Line Wire (Hot) or a color conductor which will be black,
red
> > or blue has voltage that is different then the Neutral Wire (White), the
> the
> > GFI will detect this unbalance and will open up the circuit.
>
No, it is not voltage it is current. If the current is not identical in
both conductors, then there is a 3rd leakage path which might be your body,
so it trips.
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