Hot skin refers to a voltage present on metal components of the RV usually caused by deficiency in the electrical system inside or outside your RV. If the RV is properly bonded and grounded no such condition can occur. Don't let the "grounding" part of the EGC confuse you. It's really the equipment bonding conductor. Don't think in terms of "grounding" equipment, connecting it to the earth. Think in terms of connecting it to the system grounded conductor or the grounding electrode conductor (or both). Remember, the low-impedance fault-current path you create is necessary for overcurrent protection devices to operate. Earth is not a low-impedance fault-current path.
Ground current (voltage) is a dangerous condition This problem occurs when part (and at times all) of the return current in the neutral conductor flows through grounding conduit and conductive parts of the building back to the service entrance. This current is called ground fault leakage current. It can generate disturbances and other problems such as High voltage differences between separate grounding points, which may be dangerous.
If you have a hot skin you need help with finding the fault with Bad shore power plug connection, Improper grounding, no grounding, reversed polarity, Improperly wired extension cords usually caused by a park owner, employee or guest improperly rewiring an extension cord, Improperly wired 30 amp adapters, Loose or worn power outlets,Reversed polarity in electrical outlets in the RV.
An AC tester, for example a Fluke VoltAlert is an easy way to test for hot skin. AC testers are available at hardware stores for around $30. anything over 2 volt is a problem.
Everything in my boat is bonded from the rails, window frame, to the engine and connected to an underwater bonding plate.
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