Flow Jet Pump

Can anyone tell me why a submersible pump has a low voltage charge after the power is turned off?

I have a submersible pump drawing water from the lake. When I turn off the power to the pump, there is still a low voltage charge (12 volts or so) when you touch the pump. I have eliminated the sources for a ground fault. Any ideas why the pump has the low voltage charge?.

Public Comments

1. The switch for the power may be incorrectly placed in the neutral line rather than the hot line, so even when the switch is off, the pump is being fed line voltage. Leakage to the case within the pump motor, could produce some voltage at the case of the pump.
2. Check your ground first of all. 2nd check your polarity between hot and neutral. Be careful, electricity is dangerous, if you don't know what your doing, call up the manufacturer and have them take care of it for you.
3. I'm not sure where you're measuring the voltage from, but it's possible that there is a capacitor in the pump that gets charged up to 12V during operation, and then isn't able to discharge when pump is switched off. The easiest way to check would be to unplug the pump (if possible) after turning it off and check if the voltage remains. If it does, then it's probably a charged up capacitor. If not, then it's bad wiring.