A folding high voltage electric power switch that can be fully assembled, tested and adjusted at the factory and then folded for shipping on a road truck with minimal disassembly. The switch can then be readied for installation with minimal field assembly largely limited to unfolding and securing support beams and struts. The switch includes a number of phase insulators (i.e., two phase insulators for a 2-way switch and three phase insulators for a three-way switch), a central switch insulator and a number of blade arms, each selectively connecting an electric power tap at the central insulator to an electric power tap at a respective phase insulator. The platform includes structural beams and struts that easily fold for transportation and unfold for installation in the field while the beams, struts, insulators and blade arms remain attached together.