Lightning Protection

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ampal

Member
Location
Houston, Texas
If you have a lightning protection system with a ground loop, I know you are required to have a downcomer every 100ft. But my question is since you have the loop, does the downcomer still have to terminate in a ground rod?

Thanks
 

dereckbc

Moderator
Staff member
Location
Plano, TX
But my question is since you have the loop, does the downcomer still have to terminate in a ground rod?
No there is no requirement to do that. However from a design POV you do not want to connect the down conductors to the ring. You want to drive a rod and connect to the down conductor.

The only place want to bond the two together is at the service entrance.
 

ampal

Member
Location
Houston, Texas
I see, thanks guys, it seems that the ground ring and well are connected indirectly, I've seen some designs where the downcomer crosses the ring and terminates in a ground well..
 
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