ELECTRICAL ACCESSORY BOX

摘要

In order to provide an electrical accessory box which can be fixed in position in a hole in a cavity wall or dry lining without the installer having to access clamping arms which are located within the body of the box, the box (10) comprises a hollow body (11) having at least one side wall (15), at least one flange (16) extending outwardly from the side wall (15) at the end of the body and at least one aperture (22) in the side wall (15), at least one clamp (12, 13) being mounted in the body adjacent to the aperture (22) for rotational movement about an axis normal to the end of the body (11) between a first position in which a clamping arm (19) of the clamp (12, 13) is within the body (11) and a second position in which the clamping arm (19) projects outwardly from the body (11) through the aperture (22), and for slidable movement in a direction parallel to the axis. Locking means (26) are provided for resisting rotational movement between the second position and the first position. In use, the box can be mounted in a hole in a cavity wall and the clamping arm (19) can be made to engage the rear face of a sheet (28) of material constituting part of the cavity wall while the flange (16) engages the front face of the sheet (28). The clamp (12) comprises a drive part for engaging a screw threaded member (38), the coefficient of friction between the drive part and the screw threaded member (38) being such that rotation of the screw threaded member (38) can drive the drive part rotationally against the resistance of the locking means (26) into the second position.