Most of that "stuff" per code should already be grounded,
eg metal switch boxes, conduit, metal light fixtures,
and the water heater that is in question.
And if you tie that new ground rod to say the metal
electrical box or conduit, its
A - redundant
B - A code violation
The whole point of GFIs is to catch all those other
paths before they can harm a person
or the horse. And it doesn't render the question moot
as no matter how much metal "stuff" you ground
there is always going to be other failure modes.
On Sat, 28 Jan 2012 14:40:46 -0800 (PST), " email@example.com"
He could still be establishing an equipotential grounding grid and
that is a ground rod on steroids.
For the purposes of this discussion, a GFCI protected circuit should
be safe enough not to kill the horse. The question is how many times a
horse would chew that conductor and get shocked before he figured out
what was causing it and stop chewing the conductor.
On Jan 28, 3:24 am, firstname.lastname@example.org wrote:
I had an experience a a few years ago. I was working in a flooded
area being pumped out by a LIttle Giant submersible pump.
I was powering the pump via an extension cord plugged into a GFI
outlet. While working in the same muddy mess that the pump was
exposed to, at time a felt a bit of a tinge in my hands & arms. Not
much but noticeable. I was fully soaked.
I did not diagnose it further but I did plug the cord from the GFI and
the tingling went away.
The GFI never tripped (I tested with the push button and it worked
My guess was that I was more sensitive than the GFI.
Yes, and it happened to me, twice, and each time it was fairly
To prevent nuisance tripping, GFIs have a time delay that varies by
the level of current leakage. The old UL standard 943 allowed 6
milliamps of current to flow for as long as about 6 seconds before the
AC had to be disconnected, but the time shortened to 30 milliseconds
at a current level of about 200 mA. That's a very, very dangerous
current, and even a far lower 20 mA is bad enough to cause muscle
paralysis and prevent a person from letting go. Apparently humans can
feel electric current at just 0.5 - 1.0 mA. Do NOT try to get an
idea of the sensation from an AC outlet, even with a 15,000 ohm
resistor in series to limit the current to a safe level
yes you or the horse will feel the current for the time before the GFI
trips. If the current is high enough, it can be very painful.
yes along with using the GFI, you should ground the metal tub and any
other large metal associated with electrical devices.
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