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Trolleybuses use a next parallel overhead line for the return, and two trolley poles, one making contact with Each individual overhead wire. (Pantographs are generally incompatible with parallel overhead lines.) The circuit is finished by utilizing equally wires. Parallel overhead wires also are made use of on the rare railways with three-phase AC

Some consultant samples of command-line choices, all relating to listing data files inside of a Listing, For example some conventions: Functioning methodA piece insulator at a bit split in Amtrak's 12 kV catenary To allow maintenance on the overhead line while not having to transform off all the procedure, the line is damaged into electrically div