The ornamental design for an electricalplug, as shown and described.
FIG. 1 is a top, side perspective view of an electrical plug, showing my new design;
FIG. 2 is a bottom, side perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines shown in the drawings are included for the purpose of illustrating portions of the electrical plug that form no part of the claimed design.