Why Do Electrical Plugs Have Holes On The Prongs? Answered

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Do you know about Why Do Electrical Plugs Have Holes On The Prongs? Some things become second nature to you when you live in a particular area and don’t have to think about them at all.

The pals of my son’s age group don’t know what it’s like to go out in public without a face mask on. Therefore they won’t remove theirs. Some individuals are surprised by the hard-wired internet, too. However, we can go much further back in time: electric plugs. What’s the rationale behind their design? Because they have holes and always had spots.

Why Do Electrical Plugs Have Holes On The Prongs?

Historically, sockets contained bumps. The purpose of these bumps was to fit into the perforations. It would have been quite simple to take the plug out of the socket if there weren’t any bumps and holes.

Electrical Plugs Have Holes On The Prongs

For What Purpose Are The Holes On The Prongs Of Electrical Plugs Located?

Male and female pins connect devices that generate and consume current, respectively. A “Prong” or “Hole” isn’t exactly clear, but that’s the gist of what you’re saying. So, the main connectors on a wall are always holes, except for the Earth connection.

Which isn’t always present. And the pins on the equipment’s connectors are safe to touch because they won’t kill you if you feel them. The suppressors can generally give you a nip, but that’s instructive.


  1. After analyzing a waffle iron from the 1960s, he decided to investigate further. On June 17, 1913, American inventor Harvey Hubbell received a U.S. patent for the first electrical plug.
  2. Hubbell’s design didn’t include any holes, despite popular belief. Quite the contrary, to be precise. The plug was initially surrounded by semi-circular indents instead of intentional gaps in the metal. These indents were created to keep the pin from falling out of the socket.
  3. This is where things get a little out of hand. Because of the iconic nature of Hubbell’s plug, others have attempted to customize it. As a result, a wide variety of plugs were created. None of the plug manufacturers dared to imitate Hubbell’s semi-circular indents for fear of being sued.
  4. Because Hubbell was still suing, it didn’t work out for him in court, but a decision was made that the U.S. needed a single, universal plug design. As a result, all formats, including Hubbell’s, converged. Thus, an electrical socket with holes in the center and Hubbell’s semi-circular indents on the sides was created due to this.
  5. However, this does not address the underlying issue of how the holes got there in the first place. When you look at modern electrical sockets, you’ll see that none of them have grooves that make use of the shape of a typical plug. Aside from that, nothing will plug into the electrical socket.
  6. Some of the most common myths concerning these holes:
  7. Some speculate that the holes were drilled to accommodate an electrical lockout. There is no evidence to support this, as lockouts were first implemented in the 1950s, more than 40 years after the first plug was invented.
  8. An even more ridiculous theory is that the metals extracted by drilling out the holes were used to help the war effort. Because the Second World War didn’t begin until 1939, this is also likely incorrect.
  9. Back to the facts, then. When it comes to modern electrical plugs, the American National Standards Institute (ANSI) says that there is no standard for placement holes in them. This seems strange because the spots were crucial in standardizing the U.S. electrical plug back in the day.
  10. So, in a nutshell, these holes have no effect. Nothing at all. To save money on metal, production businesses prefer to use plugs riddled with holes. As a result, they and the rest of the globe save a lot of time and money because consumers now expect to find holes in their plugs.

Can I Use A Plug Without Holes?

Plugs are secure whether or not the prongs have holes. Two flat prongs with a hole near the tip are part of type A and type B plugs. Two spring-action blades grasp the sides of the plug pins in some sockets and stop the plug from just falling out.

Why Do Some Plugs Have 3 Prongs?

A grounding wire is the third wire that emerges from three-prong outlets. During a surge, the extra current and voltage have somewhere to go outside your body or your devices. As a result, they offer much greater physical safety for both you and everything else hooked in during the surge.


That’s all about Why Do Electrical Plugs Have Holes On The Prongs? To put it another way, it saves them money on raw resources. The metal you get from punching out these tiny holes is a valuable resource if you’re mass making a lot of these prongs. Afterward, you melt the metal down, and you’ll get another “free” plug out of every 20 pins you manufacture.

Frequently Asked Questions

What’s the deal with the prong holes on plugs?

They fit tightly into the plug’s openings, making the connection more secure and reliable. It’s why a well-designed plug won’t simply fall out of a socket, and it also helps maintain a stronger relationship between the contacting wipers and whatever device/appliance is connected to that plug.

Does the plug have any holes in it?

The prongs of a plug are safe whether or not they have holes. Flat prongs with a spot near the tip of Type A and B plugs are shared in both types of plugs. Two spring-action blades retain the sides of the plug pins in some sockets, preventing the plug from simply falling out of the socket without being noticed.

What’s the purpose of the three holes on a plug?

A three-prong plug is designed to ensure that electrical appliances can be safely powered. The third prong grounds the power, preventing anyone from electrocuting while using the metal-encased gadget.

Why are some connectors three prongs?

For safety reasons, three-pronged outlets have an additional outlet if one of the other two outlets fails. The safety feature is compromised if the third prong is removed. The cover screw was used to complete a grounding circuit on some earlier plug designs in adapters.

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