Originally Posted by Paul
I think the insulating value of an inch of rubber is irrelevant when you consider the voltages involved in lightning. After all, air is a pretty good insulator, yet lightning manages to ionize it and travel--what--a mile to the ground. A quarter inch of rubber won't save you. If it would, no one would ever be killed by lightning as long as they were wearing rubber soled shoes...which is pretty common in this day and age.
It's not the thickness of the rubber that matters. It's more about the surface area. Electricity doesn't flow through a conductor or an insulator. It flows around a conductor. The difference between a conductor and an insulator is all about free electrons in the outer valance ring of the atoms the substance if made from. Rubber is a stable material as far as its molecular structure is concerned. Another tid bit for you, as voltage increases current decreases proportionately (Ohms Law). All that lightning is, is the equalizing of potential between two electromagnetic fields, a positive and a negative. But you guys are the pro's so I'll just step out and let you hash it out. Guess I wasted my time going to school all those years.