A power busway assembly includes a pair of opposing non-ferrous metal apertured side plates. The side plates have a U-shaped configuration and include a pair of top and bottom flanges that are joined by a flat piece. The power busway assembly further includes a means on one end of each of the flanges for interlocking the side plates together. The interlocking means intern has an angulated projection or an angulated slot. First rails extending from one of the pairs of flanges are also included that provide hanger support connection means. In addition, second rails extending from another one of the pairs of flanges are included that provide ground stab connection means. The power busway assembly further includes at least one brace that is interconnected with the flanges. The brace is dimensioned and configured to bias the interlocking means together. A method of securing a busway housing to busway power conductors is also presented.