At a recent home inspection in Mount Vernon, Washington, I noted dangerous double-tapping or electrical wires in the old electrical panel. Double-tapping the main service entrance conductors (wires) at an older fuse panel is a definite safety issue that can lead to overheating of the undersized wires and at the lugs themselves. Double-tapping is where two (2) electrical wires are connected under one screw or terminal in an electrical panel. Further evaluation and repair by a qualified electrician was advised. It would also be prudent to update the old fuse panel for improved safety.