The ornamental design for the electrical device cover, as shown and described.
FIG. 1 is a front view of a first embodiment of a design for an electrical device cover;
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a right side elevational view thereof which for the basic design is the mirror image of the left side view thereof;
FIG. 5 is a perspective view thereof;
FIG. 6 is a front view of a second embodiment of the design for an electrical device cover wherein the design is applied to two adjacent covers coupled to the same base;
FIG. 7 is a top view thereof;
FIG. 8 is a bottom view thereof;
FIG. 9 is a cross-sectional view thereof, taken along line 9—9 of FIG. 6, which for the basic design is the mirror image of the left side view thereof; and,
FIG. 10 is a perspective view thereof.
The broken lines shown in the Figures are for illustrative purposes only and form no part of the claimed design.