Potential is any (and I mean any) difference in electrical charge between any two objects. This means there is almost always potential between things that are insulated from one another. Static electricity is excess electrons (or too few electrons) in an insulator (non-conductive substance). When conductors are in the presence of moving or changing magnetic fields, they gain potential. Conductors hooked to a supply of electricity (REMC or Con Ed.) they have a rated potential and if they are in good shape, will conduct that voltage to where it is needed. They can also have additional voltage (potential) induced into them in addition. Faulty grounding rods, or rods in dry ground, can fail to control the ground state of the ground wires, and the ground state of the neutral wires in that system (bonded to the ground at the meter and or first panel. A barn lot with animals (usually without gum boots) stands in a bit of muck, and gets a drink from a electrically heated tub, there is likely some potential. If you had wet lips and your bare feet in earth ground mud you would be reluctant to sample the potential your self, especially after getting a few volts the last time you tried it. There are systems in place that rely entirely on the earth to be the return link to the generating plant. any time you see one wire on poles going across country, that is the case. The stray voltage in that situation must be easily found!!. Jim
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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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