Back in the 60's I lived in a trailer while in college. It had a steel water line, a copper water line to trailer, 4 wire service. One day while disconnecting copper water line, I noticed a spark. So. I pulled the electric disconnect. Still had a spark. I measured 1 vac between trailer ground, which was grounded at the electric meter 20 ft away and the steel water line, which was over 100 ft long running to the road where it connected to the water main. After I reconnected water line ammprobe measured 1 amp in the copper water line. The owner of the trailer park, also a Rose Hulman EE grad, scratched his head and had no answer.
So, I've seen what you are talking about first hand.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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