That is a sore point with one central service and several out buildings with their own distribution panels. It becomes a problem with live stock in particular. Something raising the ground system above true earth in one building. Can cause tingle voltage in the same or another building. Even neighbour's buildings. Anything that gets a ground and a neutral in a parallel path and the ground carrying neutral current is trouble. With one central service and distribution panels in the outbuildings. At one time they required the ground and neutral bars be bonded together in the outbuildings and at the central service. This led to good intentions but bad voltages on anything "grouned". The solution and a good one IF.......... each building has a very good grounding system. BUT.......few do. Is to back off the bonding screw at each remote panel between the neutral and ground bars. Now the neutrals can float up 0.1 to 10.0V above true earth potential. Without dragging the grounding system up with them. The final approved solution around here is to pound ground rods and/or bury ground plates until there is a proven good grounding system. The bond screw is not replaced between the out buildings neutral and ground bars. A magnetic reactor called a tingle voltage filter is connected between the neutral bar and the ground system. The neutral still floats unless there is a serious fault which brings the neutral above 10V above true earth. Then the tingle voltage filter starts to conduct and "clamps down" the errant neutral to "earth".
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Today's Featured Article - A 1937 John Deere Unstuck - by Gary Hickman. Here is my story of how I got the pistons out of a 1937 JD B that the engine had been stuck for about 14 years: About 12 years ago my Dad gave me one of the tractors I ran as I was growing up on our farm in central Nebraska. The engine on this tractor, a 1937 John Deere "B", had been stuck for 2 years before he gave it to me. This last spring (1999) I hauled the tractor to our 2 acre lot in St. Libory Nebraska where it joined my antique machinery collection, at that time a 1929 Caterpillar T
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