a utility cross arm assembly for supporting electrical wires from a utility pole . the entire assembly is constructed from insulative materials . it is provided with easily replaceable wire support members or protective caps to enhance convertibility from a single phase delivery configuration to a three phase delivery configuration . the assembly frame provides left and right cross arms with an upper support neck . various arms and legs provide structural support and a way to mount the assembly to the utility pole . large open spaces between the arms and legs provide a lightweight construction with low air resistance upon mounting to the utility pole .