Patent ID: 7374058

Claim:
A while-in-use electrical box cover comprising: a cap having a pair of cap side walls, a first cap end wall, a second cap end wall and a top wall, wherein the cap walls define a cap opening and a cap interior; a base comprising a pair of base side walls, a first base end wall, a second base end wall and a back wall, wherein the base walls define a base opening and a base exterior, wherein the cap side walls and cap end walls telescopically move with respect to the base side walls and base end walls; first and second mating members on the interior of each of the cap side walls; first and second inter-engaging members on the exterior of each of the base side walls extending substantially between the base opening and the back wall, wherein the first inter-engaging member of each base side wall is adapted to receive the first mating member of each cap side wall and the second inter-engaging member of each base side wall is adapted to receive the second mating member of each cap side wall; and an aperture in the back wall for accessing an electrical device.