grounding ? at pond location

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steveng

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a 100amp panel is located adjacent to a small steel bridge over a pond,

1.the question is regarding the touch potential of the steel bridge,

the panel is bonded to the steel bridge and a egc is run to a rod,

the panel is fed from a sds 1 ph 480/240/120 in a bldg 130 feet away, there is no egc run with the feeder conductors.pvc conduit.

the neutral is bonded to the egc/rod/bridge

is this a safe installation?

the bridge is bonded to the panel by screws, is the shock /touch potential greater in the event of a fault?

the panel feeds 2 small 120v fountain pumps run 24/7 and tree lights, this is a public pond. pumps are on gfci receptacles.
 
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It sounds like you've done about all you can do. You bonded the metal bridge. Hopefully you have a main bonding jumper associated with that equipment.
 
thanks marc

thanks marc

mdshunk said:
It sounds like you've done about all you can do. You bonded the metal bridge. Hopefully you have a main bonding jumper associated with that equipment.
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yes, but in this case, its the system bonding jumper, its a sds, not a service:D
 
steveng said:
the panel is fed from a sds 1 ph 480/240/120 in a bldg 130 feet away, there is no egc run with the feeder conductors.pvc conduit.
the neutral is bonded to the egc/rod/bridge is this a safe installation?
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Correct me if I am wrong but it appears what you have is a panel being fed from another structure. I believe art.250.32 comes into play here. The installation sounds okay to me. In the 2008 code an egc will be required to be run in the PVC however in past editions of the code this was code compliant.
 
yeah , and let us not forget 682 . can't tell if it applies or not by the information given.
 
I would say 682 does apply. Motors for fountian are involved. You need an expotential bonding grid around the panel. Also High water auto disconect.
 
yes

yes

Dennis Alwon said:
Correct me if I am wrong but it appears what you have is a panel being fed from another structure. I believe art.250.32 comes into play here. The installation sounds okay to me. In the 2008 code an egc will be required to be run in the PVC however in past editions of the code this was code compliant.
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yes, the panel is fed from a xfmr in a bldg/structure 130 feet underground in pvc conduit,

i see 682 covers this installation, thanks for your suggestions,

my concern is for the safety of the public that walks across this small steel bridge , it is approx 35 feet across a pond with 2 fountains. the panel is located at the base of the bridge/mounted to the bridge with screws, approx 2 feet above the water line, less than 3 feet from edge of pond/concrete sides.

this bridge was installed 12 yrs ago.
 
steveng said:
yes, the panel is fed from a xfmr in a bldg/structure 130 feet underground in pvc conduit,

i see 682 covers this installation, thanks for your suggestions,

my concern is for the safety of the public that walks across this small steel bridge , it is approx 35 feet across a pond with 2 fountains. the panel is located at the base of the bridge/mounted to the bridge with screws, approx 2 feet above the water line, less than 3 feet from edge of pond/concrete sides.

this bridge was installed 12 yrs ago.
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Check 682 for distance from waters edge. 5' min. Must be 1' above the electric datum plane. Datum plane is 2' over high water line.
 
Cavie said:
I would say 682 does apply. Motors for fountian are involved. You need an expotential bonding grid around the panel. Also High water auto disconect.
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I've been waiting for you.:wink:
 
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