Electrical socket outlet for a moulding or support, comprising: - means for positioning and retention on the moulding or the support of an outlet body provided with two holes for receiving a plug, positioning being produced in at least two orientations, one at 90°, with the axis of the holes parallel to the axis of symmetry of the moulding or of the support, the other at 45°, with the axis of the holes on an axis forming an angle of substantially 45° with respect to the axis of symmetry of the moulding, fixing means for an assembly of a front + well on the body, two faces of the front being parallel to the moulding (4, 5) or to the support, the front, with a substantially square base, comprising four sides perpendicular to one another in pairs and closed by a cover, said cover having a circular opening in its centre, - and means enabling a relative rotation of the well with respect to the front in order to bring the two holes (201, 202) for receiving a plug and the hole for receiving the earth pin of the well facing the holes for receiving a plug and the earth pin of the body of the outlet, characterised in that it comprises: a pin for connection to earth and positioned on an axis perpendicular to the axis of the said holes and in that the front is extended by four resilient flanks in the form of an arc of a cylinder which are symmetrical in pairs with respect to the axis of symmetry of the opening, each of these flanks being provided, at its free end and on its internal face, with a groove intended for snap-fitting of the well on the front, the front being likewise equipped on the internal surface of each of its faces, close to their free end, with a rib intended for snap-fitting of the front on the body of the outlet. - means for positioning and retention on the moulding or the support of an outlet body provided with two holes for receiving a plug, positioning being produced in at least two orientations, one at 90°, with the axis of the holes parallel to the axis of symmetry of the moulding or of the support, the other at 45°, with the axis of the holes on an axis forming an angle of substantially 45° with respect to the axis of symmetry of the moulding, fixing means for an assembly of a front + well on the body, two faces of the front being parallel to the moulding (4, 5) or to the support, the front, with a substantially square base, comprising four sides perpendicular to one another in pairs and closed by a cover, said cover having a circular opening in its centre, fixing means for an assembly of a front + well on the body, two faces of the front being parallel to the moulding (4, 5) or to the support, the front, with a substantially square base, comprising four sides perpendicular to one another in pairs and closed by a cover, said cover having a circular opening in its centre, - and means enabling a relative rotation of the well with respect to the front in order to bring the two holes (201, 202) for receiving a plug and the hole for receiving the earth pin of the well facing the holes for receiving a plug and the earth pin of the body of the outlet, a pin for connection to earth and positioned on an axis perpendicular to the axis of the said holes and in that the front is extended by four resilient flanks in the form of an arc of a cylinder which are symmetrical in pairs with respect to the axis of symmetry of the opening, each of these flanks being provided, at its free end and on its internal face, with a groove intended for snap-fitting of the well on the front, the front being likewise equipped on the internal surface of each of its faces, close to their free end, with a rib intended for snap-fitting of the front on the body of the outlet.