current tends to travel along the outer surfaces of a conductor in a process known as skin effects. in large electric substations the high voltage buss work is sometimes hollow tubular bars so designed for that reason. electric transmission lines are made up of stranded aluminium conductors wrapped around a steel core. steel core for strength and wrapped stranded conductors for ampacity. large solid conductors imparts more resistance in the circuit, this combined with skin effects tends to restrict current flow. stranded conductors typically will have a higher ampacity due to their smaller individual size having less resistance and also each strand will have its own skin effect. there is some thoughts that stranded conductors have less heat dissipation which will serve to reduce current flow. now is it atom to atom or does each atom just bump into each successive atom to make current flow?
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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