Equipotential Plane and Horse stables

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wrobotronic

wrobotronic

Senior Member
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Colorado
Hello All,

Article 547 is not an article I am intimately familiar. That being said, I am trying to determine if the cages in the picture need to be bonded to the Grounding Electrode System.

If so, how exactly would I accomplish this? Is it as easy and making the stall panels continuous back to the panel and connecting a bare #8 at ground bar in the panel. or conversely could I connect to the UFER?

I am a licensed electrician. I have just never come across this before, and I want to do it correctly, so I don't fail the inspection :D

Finally, should this be in the NEC thread?

Horse Stalls For Bonding.jpg

Thank you all very much...

WROBO

PS There is a waterer betwixt every two stalls that has an equipment ground in the circuit
 
Speaking of the slab. how would that be done if there is no rebar in the slab? at least, that's what I was told by the HO as the slab was there before I was... I assume it is to late?
 
We do a lot of equipotential grounding in dairy barns. We would of had them install mesh or a rebar grid in the concrete and then installed bonding jumpers to the metal fence.

Since the floor is poured and the fencing is up, what did they call you in for? To install lighting and receps?
 
I think bonding those panels would be a good idea in regards to lightning protection.
 
Unless there's a chance of those panels becoming energized, why would you ground them?

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No they do not need to be bonded, unless they are likely to become energized in some way.

Yes it is too late to install an equipotential plane in the existing slab.

Here such places would normally not require inspection. They often will not get an equipotential plane, electrician won't even be notified to install anything until the building is nearly completed. Dairy barns are somewhat of an exception though. Those owners do know that stray voltages effect production in the cows and are talking to their electrician early on in the process.
 
B.Bray said:
If you do need to bond, the horses won't drink. they can detect small amounts of potential.
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If their water source is at a different potential then what they are standing on. If just the fences/gates are all that is at different potential they will stay away from them.
 
wrobotronic said:
Alos in addition to the above, the entire floor will have rubber mats covering it. will this help at all?
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I would think a conductive matt would be better since you have no concrete electrode below them.. also look into the service neutral size and length before bonding egc to any metal
 
Yes they will

Yes they will

Originally Posted by B.BrayIf you do need to bond, the horses won't drink. they can detect small amounts of potential

I have seen that with water tanks in the field, not enough to trip GFI but enough they would feel it when they went to drink. If water level in tank did not go down we knew we had a bad heater.

I saw a large grounding grid for a fence charger open in the middle one time. You should of seen the horses when the charger pulsed and they were inbetween the open area. The step potential must of been big. they would jump straight up.
 
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