A clip on ammeter is is a good recommendation. I don't know how sensitive they were and the nature of the stray voltage. The video was indeed terrible. I'm g

A clip on ammeter is is a good recommendation. I don't know how sensitive they were and the nature of the stray voltage. The video was indeed terrible. I'm guessing the scaffolding was metal but that the wheels were rubber (it seemed as though the current was only going though the workers).