Is the 4 wire cable needed for Shore?

[PhilMateo]

I am redoing 65 overlander. IS the 4 wire, 220 volt cable needed at shore hookups? Can't I replace with lighter, new 3 wire 120 volt cable with 3 prong plug?

I do not have nor will have anything that runs on 220v.

Thanks

[overlander63]

Your coach should be wired for 120v 30A service. You should have no 240 volt service, unless it was added by a P.O.
I bought wire and a 30A RV plug (the RV part is critical, if you use standard 30a plug, it won't fit the plug at the campground) from Ace Hardware, installation was easy The wire is three conductor, not four.