Why Do Electrical Plugs Have Holes in the Prongs? | Simple Things Surprising Histories Electrical plugs are everyday items that hide a fascinating, century-old secret. In this video, we explain why electrical plugs have holes in the prongs step by step using real history and verified engineering facts. This documentary-style episode from Simple Things Surprising Histories covers the complete history of the electrical plug, from early 1900s inventions to the hidden manufacturing and safety purposes of modern wall outlets. Topics covered in this video: • What standard North American electrical plugs look like • How early 1900s homes were wired before wall outlets existed • Harvey Hubbell's invention of the first detachable electrical plug • The original "bump and hole" locking mechanism from 1913 • How modern wall outlets work using friction and pressure plates • Why manufacturers still put holes in the metal prongs today • How prong holes assist in factory injection molding • The life-saving safety feature of "lockout-tagout" mechanisms Chapters: 00:00 - Intro: The Hidden Detail 01:03 - Chapter 1: The Bumpy History 02:15 - Chapter 2: The Modern Outlet Illusion 03:08 - Chapter 3: The Secret Second Life 04:08 - Outro: The Final Takeaway This video is designed for students, educators, and general audiences who want a clear explanation of everyday engineering without unnecessary complexity. All explanations are factual, educational, and suitable for learning purposes. If you are searching for: why do plugs have holes in the prongs, electrical plug holes explained, Harvey Hubbell invention, how electrical outlets work, history of the electrical plug, lockout tagout safety, everyday mysteries explained, or engineering secrets, this video provides a complete and accurate overview. #EverydayMysteries #HowItsMade #EngineeringFacts #ScienceExplained #ElectricalEngineering #HistoryFacts #EducationalDocumentary #scienceexplained #sciencefacts #sciencedocumentary #simplethings #simplethingssurprisinghistories
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Um, why are the vast majority of the outlets and plugs pictured in this video from Europe or Asia and not from North America?
It doesn't "beg the question". It RAISES the question. Look up the meaning of "begs the question".
This would make a great one minute video.
Background music is FAR TOO LOUD!!😊
AI Slop. Not even showing the plugs being discussed.
I am 70 years old and have never seen anyone use those holes for anything! The only useful information here was what the holes originally were used for. The outlets no longer engage with the holes because it would be more expensive to produce the original design outlet.
Those holes are used to stretch 1 minute videos into 5 minutes.
When electric house wiring first came on the scene, wires were installed bare naked, and there were an insane number of housefires and electrocutions going on for some time, til inventors wised up and invented coated wire.
"..a century mystery..." Really? The first time I saw those flimsy American plugs, I realised that something was needed to keep them in place.
It was interesting to see Steven Miller has a second job playing an electrician in this video.
ChatGPT answered this question in less than a second
Jesus, just tell us without all the bs!
In sociology, they discovered that innovation starts from what's available.
27 seconds of information, and the graphics are on crack. AI is shit—especially when you don't check the output.
Hubble still makes locking plugs they are called twist lock now. 😊
And legality, if anyone uses a device without and a fire insues, they could sue. But the devices with the holes are least likely to be held accountable considering the lock out option
1:54
UM…. 2:20?? WTF?? Good AI narration though.
I got a charge out of this post, just saying....