The round aluminum pipe that looks like conduit is commonly called a bus or buswork. Bus bar is in electrical switchgear. The bus I was referring to was the bus work coming out of a transformer. The voltages involved are 345kilovolts. A sapling was growing in the vicinity of the vertical bus that was going up to a feeder tower. The guy cut the sapling, when it was free it touched the bus. His hand was holding the sapling as it hit the bar and he was a direct short to ground.