Why Do Electric Plugs Have Holes? [REVEALED!]

Why Do Electric Plugs Have Holes? We use electrical plugs on all of our appliances and lamps and radios. But why are these holes on the blades of the power plug prongs? We never use these holes for anything. We will answer this for you and show you how the electrical plug evolved into this current state and why these holes are in the electric plugs. We also dig into the history behind the patents associated with electrical plugs to determine who invented the holes in the prongs on your electrical cords.

00:00 Introduction: What are holes in electrical cord prongs?
00:41 Common Theory: Holes in plug prongs help lock it into the outlet receptacle
01:21 Theory: Holes are material cutouts to save material cost?
01:52 Inventor patents leading up to modern electrical plug with hole
05:08 Inventor lawsuits over electrical plug designs
05:43 NEMA standards formed for electrical plugs and receptacles
07:28 NEMA/ANSI spec WD 6 Shows holes in the design spec
08:54 Purpose of holes in electrical plug blades
09:59 Why standards and specs are important