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Re: 3 wire verses 4 wire [question for jimbob]
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Posted by Jimbob on March 04, 2003 at 19:06:52 from (188.8.131.52):
In Reply to: 3 wire verses 4 wire [question for jimbob] posted by fredo on March 03, 2003 at 13:01:34:
I know the story being from Michigan. A farmer sued Consumers Power over this. You see, some areas will only have one high voltage line of, lets say, 2400 volts AC. The other side of the wiring or 'return' in the transformer primary winding is the ground (earth, dirt, etc). Well, this produces ground currents & they can travel strange paths under the ground. The path may be through a farmers barn & it can be felt by the cows under certain circumstances.
I really sidlike this type of system. At my house, the power pole has the two 2400 AC lines. The secondary side of the transformer provides 240 vac & with the center tap of the transformer, I can also get 120 volts AC. The center tap is called the neutral & is connected to a ground rod. It is grounded. Of course, the transformer primary winding at 2400 volts AC is basically ISOLATED from the secondary (240 volt AC side). The single high voltage wire system that effected the farmers cows is not ISOLATED so to speak.
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