Originally Posted by Bus Project
Thats the point that they were trying to make... You have your wires going through what appears to be a couple of rough holes. You should have some grommets to keep the wires from rubbing against the metal and causing a short.
Ok...I see what you are talking about. I made the holes big enough to fit Great Stuff Gap filler around them. This should provide sufficent protection for the wires.
These are car audio cable and have a tuff outer skin on them.
Sorry, but I'm an aircraft mechanic. Foaming insulation won't do the job. When the bus moves, so will those cables. The rubbing action will wear thru the foam insulation almost immediately and start rubbing against the metal of the hole. The sharp metal edge of that hole will chew thru the "tuff outer skin" of the cable before you know anything is wrong and cause a massive short. Someone could even get hurt if all the amperage in those batteries shunts to the bus frame and someone is touching metal.
Go to a hardware store and get some appropriately sized gaskets. Using a couple of loop clamps (aka "adel clamps") to support those cables right next to the holes will help as well. Personally, I'd at least double the diameter of those holes as well - or just make it one big hole.
It's only a couple of bucks worth of hardware and a few minutes worth of work. Don't try to cut a corner here. It'll come back to bite you...