The ornamental design for a cover for an electricdevice, as shown and described.
FIG. 1 is a left front perspective view of a cover for an electric device in accordance with the present invention;
FIG. 2 is a right side elevation view thereof with the position of a covered electric device shown in broken lines:
FIG. 3 is a top plan view thereof
FIG. 4 is a right front perspective view thereof;
FIG. 5 is a front elevation view thereof
FIG. 6 is a bottom plan view thereof:
FIG. 7 is a rear elevation view thereof; and,
FIG. 8 is a left rear perspective view thereof.
The covered electric device may, for example, be a meter such as a meter for indicating changes in the resistance of a living body. An example of a covered electric device is represented by FIGS. 1-4 with the electric device illustrated in broken lines rather than solid lines.