Abstract: Switchboard apparatus includes means for supporting a bus bar including an elongated steel member having at least one bolt hole therethrough, the steel member being coated with an insulative material. A pair of formed washers of protective material are adapted to seat within the hole at opposite sides of the steel member. A member bolt fits within the washers and the hole, and a nut is adapted to engage with the bolt with a flat washer fitting between the bolt and one of the formed washers.

Abstract: Lower extremities of two structural, component-carrying columns are affixed to two channel members that are coupled to a base frame. The columns, members, and frame form a free standing assembly. Two other channel members, coupled to a top frame, are affixed to the columns' upper extremities. Corner posts couple the top and bottom frames.A bus bar is supported within frames and corner posts by an insulated elongated steel member having a through bolt hole. Two insulating washers seat within the hole at opposite sides thereof. A metal bolt fits within the washers and hole. A nut engages with the bolt. A flat washer fits between the bolt and one washer.A plurality of bus bars carry and distribute current at a particular voltage at a first phase. A similar plurality carry and distribute current at other phases. All bus bars are oriented parallel to one another spaced interjacently: first phase, second phase, third phase, first phase, second phase, etc.