A socket comprises a plurality of recesses with electrically conductive contacts; said recesses being configured to receive the prongs of a corresponding plug; and a plug housing recess for receiving at least a portion of the housing of a plug; wherein said plug housing recess incorporates an engagement surface against which said plug engages in order to pivot between an initial position where the prongs are positioned to enter the recesses and a position where the prongs are fully engaged within the recesses. A plug suitable for use with this socket is also presented.