In North America we have 120 and 240 single phase in homes.
Within that you get 2, 3 and 4 wire wiring methods. 2 wire is almost obsolete.
3 wire 120 and 4 wire 240 always have a ground and neutral both. 4 wire 220 is just so you run 120 v on the same circuit.
An easy way I've explained it to people is, while using a circuit, the neutral voltage floats around depending on a bunch of things. If you cheat and use your ground conductor as the neutral, its voltage will now float, as will the voltage of anything metal grounded on the same circuit.
So you've taken away the escape route for stray current and electrified everything.
Been in lots of barns with this problem. Neighbour broke his arm climbing the hay conveyor. He touched the metal siding and the 40 volts in the conveyor frame went through him to ground. He jerked and fell from 20 ft.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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