Abstract: An electrical facility including a plurality of housings each having at least three connecting ports in the opposite end portions and a side portion and having housed therein various electrical devices. An expandable connecting joint connects the housings at their connecting ports, a wiring duct is disposed in the lower portion of the connecting joint, and a tread board is disposed on the wiring duct. Thus, the electrical units within the housings are connected to provide functions similar to an integral facility.

Abstract: This invention relates to a mobile substation wherein constituent equipment of a substation are made movable by carrying them on a chassis of said mobile substation, and in a predetermined site, the substation is connected from a first terminal to a receiving line and from a second terminal to a feeder line wherein a pair of supporting devices is provided each of which has its one end turnably coupled with the chassis, and which can support the receiving line and the feeder line with their other ends corresponding to the respective terminals, when they are fixed to the chassis at predetermined positions.