Originally Posted By: bandrews
This post was automatically imported from our archived forum.
I found a triangle shaped device in a main panel today that was listed as a suare D lightning protection device. I have never seen one of these before. It had two black wires and one white wire. One black was connected above the main, the other black was connected to one pole of a two pole breaker at the top of the panel and the white wire was connected to the neutral. What is the correct way to install one of these devices.