The ornamental design for an electricalplug, as shown and described.
FIG. 1 is a left elevation view of an electrical plug showing our new design;
FIG. 2 is a right elevation view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a rear view thereof;
FIG. 7 is a bottom left perspective view thereof; and,
FIG. 8 is a top left perspective view thereof.
The structural features depicted by broken lines have been shown for the purpose of illustrating portions of the electrical plug that form no part of the claimed design.