Ground Ring Electrode for Lightning Protection System

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Shujinko

Shujinko

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When designing a Lightning Protection System for a building, when is a ground ring electrode required around the building? What code or standard is this defined in? Thanks in advance for your responses.
 
Shujinko said:
When designing a Lightning Protection System for a building, when is a ground ring electrode required around the building? What code or standard is this defined in? Thanks in advance for your responses.
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I am not a LP expert but I do not think that 780 ever "requires" a ground ring as long as all the down leads are terminated at an acceptable grounding electrode. It is a design decision.

The UFC requires counterpoise (ground ring) on many government projects.
 
luckylerado said:
I am not a LP expert but I do not think that 780 ever "requires" a ground ring as long as all the down leads are terminated at an acceptable grounding electrode. It is a design decision.

The UFC requires counterpoise (ground ring) on many government projects.
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Yes, I have looked in NFPA 780 and have not found anywhere where it "requires" a ground ring electrode or a counterpoise for a lightning protection system. Now from a design perspective when would it be good practice to provide a ground ring or counterpoise? For a building of a certain size? How big?
 
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