Electrical box

Claim 2

An electrical box molded in one piece from a plastic material and comprising: a cable inlet opening formed in the box; a flap positioned within the opening and resiliently hingedly mounted at a first edge of the opening to tend to resile to the closed position; stops positioned within the box to restrict the inward movement of the flap; an indent in the edge of the flap, remote from the hinged mount, to contact and grip a cable when such a cable is positioned in the inlet opening; a lip projecting into the box from that edge of opening remote from the first edge of the opening, the flap acting to force the cable against the lip; and the edge of the opening adjacent said indent being substantially non-deformable by a cable forced into the inlet.

Claim 3

An electrical box as claimed in claim 1 in which the lip has an arcuate upper edge to engage the plastic insulation sheath of a cable.

Claim 4

An electrical box as claimed in claim 1 in which the inlet is formed adjacent a corner of the box; a wall formed in the interior of the box, adjacent one side of the opening, to prevent ingress of contaminants into the box when a cable is in position and the flap thus moved inwardly from the closed position.

Claim 5

An electrical box as claimed in claim 1 including a substantially non-resilient outer flap positioned outside the resiliently hinged flap to limit outward movement of the resiliently hinged flap on withdrawing a cable from the box.

Claim 6

An electrical box as claimed in claim 1 in which the portion of the box adjacent said indent that is substantially non-deformable by a cable forced into the inlet is rendered substantially non-deformable by a reinforcing rib formed on its exterior surface.

Claim 7

An electrical box as claimed in claim 1 including a flexible flap positioned in the indent to prevent ingress of contaminants

Claim 8

An electrical box of a plastic material molded in one piece and comprising an opening adjacent a corner of the box forming a cable inlet opening into the box; a first flap positioned within the opening and resiliently hingedly mounted at a first edge of the opening to tend to resile to the closed position; an indent in the edge of the flap, remote from the hinged mount, to contact and grip a cable when such a cable is positioned in the opening; a second flap positioned in the indent to help seal the box; an edge projecting into the box from a position just inside the box, behind the cable inlet opening and remote from the first edge of the opening; a reinforcing rib formed on the exterior of the box opposite the edge; and stops positioned within the box to prevent the excessive inward movement of the resiliently hinged flap.

Claim 9

An electrical box of a plastic material molded in one piece and comprising an opening adjacent a corner of the box forming a cable inlet opening into the box; a first flap positioned within the opening and resiliently hingedly mounted at a first edge of the opening to tend to resile to the closed position; an indent in the edge of the flap, remote from the hinged mount, to contact and grip a cable when such a cable is positioned in the opening; a second flap positioned in the indent to help seal the box; an edge projecting into the box from a position just inside the box, behind the cable inlet opening and remote from the first edge of the opening; a reinforcing rib formed on the exterior of the box opposite the edge; and stops positioned within the box to prevent the excessive inward movement of the resiliently hinged flap.