Abstract: An electrical wallplate fitting comprising a base part, a cover rotatable through a predetermined angle between initial and final positions relative to the base to secure the cover mechanically to the base part and to release the cover from the base part, a plurality of first electrical contacts mounted on the base part at different radial distances from the axis of rotation of the cover, and a corresponding number of second contacts so positioned on the cover that when the cover is rotated from the initial to the final position the second contacts move along respective arcuate paths into contact with respective first contacts.

Abstract: A power take-off adaptor for use with a continuous outlet current supply track consists essentially of two mechanically and electrically interengageable parts, namely a contact unit and a second unit in the form of a male connector. The male connector may be permanently associated with an appliance and transferred with the appliance between one adaptor contact unit and another, or between such a unit and another receptacle such as a wall or ceiling mounted receptacle.

Abstract: A power take-off adaptor for a continuous outlet electrical supply installation has separate and independently manually rotatable shafts for operating contact fingers and mechanical fixing means respectively. The shafts have interengaging radial cam formations which prevent operation of the contact fingers except when the mechanical fixing means is operative.