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Re: Electrocuting water tanks


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Posted by John T on January 01, 2016 at 15:59:52 from (70.11.219.26):

In Reply to: Electrocuting water tanks posted by notjustair on January 01, 2016 at 14:35:21:

Let me put on my olddddddddd rusty electrical enginners hat and think this through.

If its a rubber tank that doesnt seem to be the problem nor is it like a conductive metal tank you can bond to the Equipment Grounding Conductor.

If porky pig feels a shock when he's standing barefoot on wet ground and touches the water in which the tank heater is somehow somewhere in contact THE HEATER OR CORD COULD BE SOMEHOW DEFECTIVE AND THE WATER IS ACHIEVING A HIGHER VOLTAGE POTENTIAL THEN MOTHER EARTH. IE VOLTAGE BETWEEN WATER AND EARTH ON WHICH PORKY IS STANDING OUCHHHHHHHHHHHH LOL

Heres another possibility. When you run a Hot and a Neutral and an Equipment Ground out to the barn due to the wires being in parallel, mutual inductance and capacitance can cause the Equipment Ground to out there be at a voltage potential higher then mother earth. Livestock are super sensitive to small voltage potential and can feel a shock especially since they are bad about standing barefoot on wet ground lol. Best I recall the NEC has a special exemption for buildings used to house livestock in that out at the barn they allow the equipment ground to be re bonded to earth in order to bring it back down to earths potential so bossy or porky don't get a shock.

However if you use a GFCI to power the heater and it or the cord is defective or its poorly designed SURE THE GFCI WILL PREVENT A SHOCK BUT IT WONT STAY ON TO POWER THE HEATER EITHER!!!!1111 I'm a believer in and the NEC requires GFCI for outdoor applications BUT IF THE HEATER OR CORD IS BAD IT WONT ALLOW IT TO WORK SO IS NOTTTTTTTTTTTT THE ANSWER, THE ANSWER IS TO CURE THE PROBLEM

Also, while the NEC has an exemption and a cure (re bond Equipment Ground to earth so its at same potential out at remote barn and the use of equal potential grids etc) for livestock buildings so they don't get shocked, THE SYSTEM IS NOTTTTTTTTTTT FOR BILLY BOB AND BUBBA TO GO AROUND DRIVING RODS IN THE GROUND ATTACHDED TO WATER TANKS!!!! Sure it may tend to work but its certainly NOT any proper or NEC approved method and could even become a hazard GO AHEAD AND DO IT AT YOUR OWN RISK IS FINE BY ME HOWEVER

I would have a professional inspect and test and measure the heater and cords and if they are okay look into the NEC exemptions for re earth bonding the ground at the buildings and/or the use of equal potential earth grids.

Maybe just A BAd heater or cord,,,,,,,,,GFCI if it works may then not allow the heater to work,,,,,,,,,,be careful about home made remedies like going around driving ground rods if you don't know what youre doing,,,,,,,,,,,,if all else checks fine then you have to look at the NEC grounding remedies for livestock buildings

John T NO WARRANTY its been years since I practiced engineering this may be wrong as rain, consult a trained professional is my advice or else do as non trained Billy Bob and Bubba think


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