Originally Posted By: roconnor
This post was automatically imported from our archived forum.
I was asked a question that I thought I would post here for discussion.
On an older main panel, what would be the acceptable installations of lightening/surge protection? Would it be acceptable with lightening/surge protection double tapped off the main lugs of a service panel, or what issues do you see? Was it always done that way, so this is only a "concern".
I am not used to seeing that on a residential panel, and for commercial installations I am used to seeing that connected off one of the breakers.
The double lug would not cause what I would consider the major hazard of that, which is possible overloading of the feeders. The only real issue I see is the double lug on the panel mains causing wire-to-wire contact and possible deterioration. Any thoughts?
Robert O'Connor, PE
Eagle Engineering ?
Eagle Eye Inspections ?
NACHI Education Committee
I am absolutely amazed sometimes by how much thought goes into doing things wrong