Single or three phase service? The four prong plug/receptacle to a domestic stove or dryer is called "three wire, four pole". An air compressor such as yours if on a receptacle would be called a "two wire, three pole". Air compressor make,model, size, type of starter? Size of cable you are using? Size and number of poles of the supply breaker. Bare copper is chassis ground or bonding. Neutral is an insulated current carrying conductor, with the confusing exception of overhead triplex service cable's bare neutral. Depending on how and where the utility ran power to your shop. That ground rod to neutral bar connection is wrong. No neutral needed, required or wanted at the compressor. Just two lines and a ground to chassis. Nothing personal, no slight or insult implied or intended but......... Why do people try to save a few bucks and have electrical equipment burn out? Give shocks, cause tingle voltage shocks to livestock, cause fires or just plain fail to operate properly? How much money is that saving?
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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