RV Hot Skin (Exterior electrification)

larry cad wrote:

CA Traveler wrote:
The extension cord is only one part. There could be a problem with the pedestal plug, the RV cord or wiring or for some reason the RV frame or other metal parts are not grounded.

Furthermore both the hot and neutral should be isolated from ground in the RV and reverse polarity doesn't change that.

You may want to rethink your premise! "RV frame or other metal parts" not "grounded" are typically because the neutral and hot wires are reversed. disagree Keep in mind a properly installed neutral wire is always grounded at the main panel. And ONLY at the main panel never sub panels and certainly never in the RV panel If the neutral wire is properly installed, the RV frame and metal parts are GROUNDED! No the green grounding wire is what grounds the RV metal. If the neutral wire is not properly installed, such as reversed polarity, the frame is probably NOT grounded and in this case, the hot wire is probably connected to the frame. The OP has to find the reversed polarity hot and neutral wires.

With a properly installed hot and neutral wiring system, the green ground wire is redundant, meaning it is not necessary for a safe, grounded system. It is an additional safety measure, not the primary one.

I put some notes in red. Without a green wire you do not have a safe grounded system. That is exactly why the National Electrical code does not permit electricians to replace old 2 slot receptacle's with 3 slot outlets UNLESS a ground wire or metal conduit system is present.

Think about the hot and neutral wires as they are used throughout your house and RV. They are insulated from each other and contained in an insulated outer jacket (Romex) At no point will you find the white wire connected to the metal frame of any piece of equipment (In 1996 the National electrical code no longer permitted the neutral to be used for grounding the frame of a range or dryer)