Abstract: An electrode assembly and welding system and method. An electrode assembly preferably includes an electrode mounting block, a weld electrode disposed in said mounting block with a first end extending therefrom for contact with a work piece or a projection weld nut, an insulating bushing separating the weld electrode from direct contact with the mounting block, and a contacting electrode floatingly installed into a receiving cavity located in a second end of the weld electrode, the contacting electrode provided for contact by a gun arm electrode of a weld gun. A system and method of the present invention makes use of cooperating electrode assemblies to weld projection weld nuts to a fixtured work piece. Welding current is transferred from the electrodes of a weld gun to the projection weld nut(s) and work piece via the contacting electrodes and weld electrodes of associated electrode assemblies.