Originally Posted by rockfordroo
I guess we can agree to disagree. I think the wire is a CYA addition. If there isn't enough contact for a ground, I suspect there isn't enough contact to pull my TT.
Do you put grease on your ball? Is there any dirt or oxide on the ball? That is the kind of added and variable resistance I am talking about. And the relative movement of the ball and coupler will cause arcing and sparking because of any dirt or oxide, creating more oxide for a large current to flow through.
That's why I believe the ball/coupler is an inferior electrical path.