Rid-Volt Grounding Pole
Hi,
The squirrel example is fine....as long as the squirrel is touching an exposed wire (which isn't very often).
The reason why you can still get a zap with an GFCI is a couple of reasons :
1) You happen to run around the house with your socks on (or shoes) and you touch the tank. It is the same effect as zapping your siblings for fun. GFCI won't protect you from static electricity zaps [img]images/smiles/icon_smile.gif[/img] It won't kill you either.
2) GFCI is not working as fast as it should. It takes a while for GFCI to react. Sometimes 1ms...sometimes 5ms. So...you'll still get a little jolt. It's better than getting roasted.
Its the current that kills...and current as low as 15mA (or 0.015 A) is enough to give you a little jolt. 25mA will kill you. Breakers trip around 15A or higher and they are usually very slow. It only takes a second of 25mA to kill you.
Steve,
You should put a probe on both tank and sump. There is a remote possibility that the main circultation pump could stop and one of the tanks will loose their ground connectivity.
- Victor.
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