راهنماها و مد

Why Do Electric Plugs Have Holes? Answered

Why do electric plugs have holes? You have seen them for years but what do they do? Stop believing the myths & learn what they do for yourself. After receiving multiple comments asking me to answer this question I hope you enjoy this video.
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Due to factors beyond the control of Silver Cymbal, I cannot guarantee against improper use or unauthorized modifications of this information. Silver Cymbal assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Silver Cymbal recommends safe practices when working on machines and or with tools seen or implied in this video. Due to factors beyond the control of Silver Cymbal, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Silver Cymbal.


  1. Silver Cymbal

    Silver Cymbal

    پیش 24 روز

    Thank you for watching please *LIKE & SUBSCRIBE* 👍 If you need more outlets with built in USB Ports: amzn.to/3oX0rdK shown in the video

    • Gary Grieve

      Gary Grieve

      پیش 10 روز

      @Richard Wolfe koi koi

    • Jessie


      پیش 14 روز

      Its there to have a Tighter fit in the plug... if it wasnt there it would just slide out with ease!!! Thats why the holes are there.. Sounds Dumb, punching a hole through it bends the metal so it locks in the plug.

    • L.Pasteur


      پیش 15 روز

      @Víðarr Kerr - From what I understood from the video, the holes themselves were a derivation of the small indentations from the original design by Hubbell. Other companies worked around Hubbell's design with the holes so they wouldn't have to pay Hubbell for his work. Both the small indents and the holes were there to secure the plug into the outlet so it wouldn't pull out easily. Modern day outlets, however, don't have any internal design that utilizes the holes in plugs to secure them in place. The holes are in fact obsolete or serve no purpose but we continue to use them because that's what people are conditioned to see. The prongs of plugs could be completely solid (no holes) and they would work just fine.

    • Víðarr Kerr

      Víðarr Kerr

      پیش 16 روز

      So, what were they for???????

    • Daniel


      پیش 17 روز

      You meant "indentation". There's no such thing as an "indention".

  2. matthew schreiner

    matthew schreiner

    پیش 2 دقیقه

    So we do not confuse it with the Chinese plug

  3. Old Geordie Geezer

    Old Geordie Geezer

    پیش 24 دقیقه


  4. Amir Loren

    Amir Loren

    پیش 4 ساعت

    Wow imagine thinking you were actually gonna learn something.

  5. Michel uwu

    Michel uwu

    پیش 6 ساعت

    This was insane

  6. Jason C.

    Jason C.

    پیش 9 ساعت

    They act as a catch so the plug cannot fall out. It’s friction/press Not Mechanical. The hole is round Not square because it’s easier to drill out a round hole than to punch out a square hole.

  7. MarsFKA


    پیش 10 ساعت

    There you go - three minutes and sixteen seconds of utterly useless information. You learn something new every day.

  8. Rad Thadd

    Rad Thadd

    پیش 18 ساعت

    So basically it's there because "We live in a society..."

  9. David Clawson

    David Clawson

    پیش 20 ساعت

    The answer: ease of manufacturing. The holes help the prongs stay in the molding and wiring fixtures while they're being made.

    • Ken Wittlief

      Ken Wittlief

      پیش 7 ساعت

      correct! why did this guy make a video and post it on youtube when he did not know the correct answer? oh wait... that is what youtube is for

  10. The Legend

    The Legend

    پیش روز

    Why do electric plugs have holes? The answer will SHOCK you (get the joke hehe)

  11. Philippe Guo

    Philippe Guo

    پیش روز


  12. Tai Mai Shu

    Tai Mai Shu

    پیش 2 روز

    Holes holes holes holes holes holes holes holes holes holes holes holes

  13. Barry Kratzer

    Barry Kratzer

    پیش 2 روز

    You still didn't actually pinpoint what the holes are for.

  14. betwixt2worlds


    پیش 2 روز

    Lazy manufacturing, could have saved me some life minutes here

  15. Mark Kohl

    Mark Kohl

    پیش 2 روز

    When you buy a lamp there is a plastic wire tie going through those two holes with a warning lable attached. So that is what the holes are used for.

  16. Dave Kozicki

    Dave Kozicki

    پیش 3 روز

    Very informative, thumbs up. But quit saying actually so much. It is an overused "filler" word. If you remove it from a sentence, and the sentence has the same meaning, there is the proof.

  17. robert mccully

    robert mccully

    پیش 3 روز

    Those holes are for the flux capacitors negative ions.

  18. james cisneros

    james cisneros

    پیش 3 روز

    Excellent work. I watched twice. Good editing & very informative.

  19. K W

    K W

    پیش 3 روز

    They are there so you can ground your kids by locking up their video games and other electronics.🤷‍♀️

  20. David Bronstein

    David Bronstein

    پیش 3 روز

    That's great, but I live in Australia and we don't have holes in our plugs, so that was kinda redundant for me.

  21. Ray S.

    Ray S.

    پیش 4 روز

    I have a pull down cord reel that has an outlet on the end, It has a locking outlet, so that it can't come unplugged. you have to press a button on the outlet for it to release what is plugged into it. ( If the plug has the holes in it )

  22. Will O' Man

    Will O' Man

    پیش 4 روز

    Huh? The hole is drilled out, no? So companies wouldnt have to "add" the material back in. It would technically be one less step in the process to leave the prongs solid throughout. Less machines, time, and probably saves money. And im pretty sure (nowadays) the holes are used to connect/extend wires without having to cut and splice a perfectly good cord. They used to be for pressure fittings to hold the plug in the socket but modern socket designs have made it unnecessary

  23. Chris Tollefson

    Chris Tollefson

    پیش 4 روز

    You can buy extension cords that take advantage of those hole to hold the plug in. They have a little release button on the female connector to release

  24. Turkey Bowlwinkle

    Turkey Bowlwinkle

    پیش 4 روز

    I'm gonna fill those holes and see what hap

  25. ProfessorElb


    پیش 5 روز

    Tldr; the same reason we still do circumcision

  26. DarkSerge34


    پیش 5 روز

    That hitachi wand...

  27. John Lawrence

    John Lawrence

    پیش 5 روز

    Okay then , he still didn’t answer the question why are they there

  28. Vincent van go

    Vincent van go

    پیش 5 روز


  29. Joe


    پیش 5 روز

    I wish outlets would have a click into place and you'd have to press an eject button to remove them, that would save many people from accidentally unplugging it, and it would put the stress on the pegs going through the connector, not the friction-fit connectors, and they'll be less likely to loosen over time.

  30. Michael Carmean

    Michael Carmean

    پیش 5 روز

    Do Nothing Holes ✅ Got It

  31. Lg G2

    Lg G2

    پیش 5 روز

    45,000 Likes... for a couple of holes. Lol, nice.

  32. qwertiedota


    پیش 6 روز

    So you can make one more for every 5 holes you didn't fill up. And 6 is greater than 5.

  33. That Guy

    That Guy

    پیش 6 روز

    The Algorithm Brought me here....

  34. Samuestos


    پیش 6 روز

    I’ve got a high quality modern extension cord with a button to lock and unlock plugs by use of those holes, but crappy plugs get stuck in there because they are putting those holes on without any intended purpose.

  35. citationau


    پیش 6 روز

    Whats the device at 2.04?

  36. Jim Conway

    Jim Conway

    پیش 7 روز

    The holes let the electricity get in.

  37. DoctorDothraki


    پیش 7 روز

    Long ago (around 2007 or something back when IRmys video responses were still a thing), I saw a fake tutorial saying that you could power a TV off a AA or AAA battery. The method was to use RCA jacks in the power plug holes and the other ends using a battery. Something like that. Of course, people tried this and it didn't work, including someone using a video response.

  38. Krankie V

    Krankie V

    پیش 7 روز

    Where I work, we have this old extension cord which has a lever you can flip which locks the plug into the cord so it can't fall out. I'm sure it utilizes those holes for that purpose. I wish this feature were present on more extension cords!

  39. WFY Murda

    WFY Murda

    پیش 7 روز

    I never wondered that un til I saw this video lol

  40. Eric Nata

    Eric Nata

    پیش 7 روز

    Why do 🔌 have holes? The same reason that humans have holes on their behind.

  41. h4u5er


    پیش 7 روز

    Well that was stupid... additional process in manufacturing without any good reason

  42. D VK

    D VK

    پیش 7 روز

    I use extension cord that can be locked with plugged-in electrical accessories, the lock`s mechanism use this holes for safety and will avoid unwanted unplug! You can type in google search : "Plug locker Heavy-Duty Extension Cord".

  43. The Beast

    The Beast

    پیش 7 روز

    It reduces sparks on contact from being seen as much..

  44. Hophead


    پیش 8 روز

    I was looking at some extension plugs. On one older one, the holes are on the inside only of each leg and on another, the opposite, holes on the outside only. Both have legs that are folded over and the hole is on one side only. The 3rd has solid legs without any holes.

  45. Kushana Bowala

    Kushana Bowala

    پیش 8 روز

    I dont think they drill a hole they already have it in the mold

  46. Michael Ellsworth

    Michael Ellsworth

    پیش 8 روز

    Personally, I would prefer if they reinstalled to latching mechanism in the outlets... my chargers unplug WAY too easily and often... LoL

  47. Art by Atlas

    Art by Atlas

    پیش 8 روز

    Honestly I liked the first answer about needing a standardized plug, so I’ll go with that one 😂

  48. Richard Iredale

    Richard Iredale

    پیش 8 روز

    First of all, no such word as "indention." You were probably thinking of "indentation." Secondly, the holes were used in the early days to help remove any corrosion on the socket contacts as the plug would be inserted and removed.

    • Silver Cymbal

      Silver Cymbal

      پیش 8 روز

      The original patent documents clearly describe the holes as the retention mechanism the corrosion ability is a myth with no documentation supporting this.

  49. rlitz99


    پیش 8 روز

    It's interesting that the holes were originally used to keep the plug from falling out. The real question then is when and why did the manufacturers stop making sockets to take advantage of that design feature?

    • Silver Cymbal

      Silver Cymbal

      پیش 8 روز

      That's the question I spent hours on. I believe it ended around the 50s, I could not find any example outlets after that with the prongs in use and because so many companies made outlet it varied per brand so one brand may have kept it going longer. The standard itself never actually changed and since they weren't required they likely just stopped using them.

  50. jonnyboat2


    پیش 8 روز

    I kinda remember when I was a kid in the late 60’s and 70’s having trouble pulling plugs out of the sockets. Maybe those holes were doing their job.

  51. David Sharpe

    David Sharpe

    پیش 8 روز


    • Silver Cymbal

      Silver Cymbal

      پیش 8 روز

      The UK plugs were so far ahead of their time when they were created. They are excellent.

  52. Random Spectator

    Random Spectator

    پیش 8 روز

    0:19 I didn't know the Italians made a mjolnir

  53. zurdo


    پیش 8 روز

    typical USA design stupidity. You wanna see REAL STUPID ? look at product packaging in USA products. Food products packaging to be exact. Ever tried to open a food product package? Go ahead and try.

  54. rj hinde

    rj hinde

    پیش 8 روز

    Wow, that's a modern socket / wall receptacle? Ugh...

  55. R Wright

    R Wright

    پیش 8 روز

    I never knew it !

  56. Zero


    پیش 8 روز

    The American plug is shit anyway. The European plug and socket are the best and safest. ------------ Change my mind.

  57. Gamer KING!!!

    Gamer KING!!!

    پیش 9 روز

    U got the reason in 0:50 when u showed the plug u over pushed it and u just got blind or idk there is a little bend fot it ... thats the 1st reason :)

    • Silver Cymbal

      Silver Cymbal

      پیش 9 روز

      Look carefully the holes are chamfered and offer no resistance to the prongs. The original plug patent included actual points that settled into the holes. Those have not existed since at least the 60s

  58. MrChowhua


    پیش 9 روز

    Nope, I never wondered why electric plugs have holes.

  59. rock star2345

    rock star2345

    پیش 9 روز

    I return appliances that don't have holes

  60. Kevin Wotipka

    Kevin Wotipka

    پیش 9 روز

    And it's still a terrible and dangerous design.

  61. Braeburn Hilliard's Channel

    Braeburn Hilliard's Channel

    پیش 9 روز

    Actually, there are some extension cords that use a locking female end. I've seen it several times as a commercial electrician. Certain drop course utilize those holes and when you plug it into a locking extension cord it does not allow the end to be pulled out accidentally. You have to pull back a release collar to be able to unplug your device.

  62. Teodoro Julao

    Teodoro Julao

    پیش 9 روز

    lock out tag out loto.,. hahahaha

  63. Some Guy

    Some Guy

    پیش 9 روز

    As a European, I don't care that much

  64. TheRulerofEarth


    پیش 9 روز

    On some level i knew this, but didn't want to admit it.

  65. Rick James

    Rick James

    پیش 9 روز

    It really is obvious when they're missing. Not sure why, but it's unsettling seeing no holes.

  66. Medic_Gaming 45

    Medic_Gaming 45

    پیش 9 روز

    If theres a hole theres a way

  67. zz1956 zz1959

    zz1956 zz1959

    پیش 9 روز


  68. sevin furly

    sevin furly

    پیش 9 روز

    With those holes you save so much steel in big production line

  69. onecrazywheel


    پیش 10 روز

    Open up a Hospital Grade outlet. It does incorporate the holes for retention purposes

    • Silver Cymbal

      Silver Cymbal

      پیش 10 روز

      I have opened several and none of them utilize the holes. Hospital outlets are under UL 498 and if you review this document, this is not required there either.

  70. Damon Thomas

    Damon Thomas

    پیش 10 روز

    Most plugs have holes in both prongs, but the plug on my electric golf cart only has a hole in one.

  71. Letrixo


    پیش 10 روز

    Europeans: *what?*

  72. Lamtitude


    پیش 10 روز

    So wtf are the holes for, dick? You can’t make a video like that and just leave us hanging.

  73. Peter Epp

    Peter Epp

    پیش 10 روز

    “Indentions”? Is that like an intention to make a hole? Or did you mean indentations?

  74. josh ice

    josh ice

    پیش 10 روز

    Probably won't see this but great vid bro I dont know have I have never seen u before

  75. matyrdoomツ


    پیش 10 روز

    Yeah probably because of design to help electricity to get in

  76. joffaute


    پیش 10 روز

    After all that you didn’t tell us the reason

    • Silver Cymbal

      Silver Cymbal

      پیش 10 روز

      The holes replaced the indentations that Hubell had originally used in early outlets to hold the plug in position 1:00 - what they became later is explained further in the video. Hope this is helpful.

  77. Pouring Kahuna

    Pouring Kahuna

    پیش 10 روز

    Some extension cords have a locking mechanism in them to go into those holes so when you move the cord stays plugged

  78. rigomortisfxstudios


    پیش 10 روز

    some do not have them made now

  79. FireTech


    پیش 10 روز

    2:03 nobody actually going to talk about that lol

  80. henrysmooth


    پیش 10 روز

    Convient tho if You wanted to twist wires to them or connect terminals (not advised but could be done)

  81. Ararya Arkananta

    Ararya Arkananta

    پیش 10 روز

    Laugh in asia

  82. Morey Monroe

    Morey Monroe

    پیش 10 روز

    Am I the only one to catch the humor at 2:03

  83. nick fatsis

    nick fatsis

    پیش 10 روز

    I wonder how many countries don't have those holes? We don't in Australia.

  84. Ho Renomo

    Ho Renomo

    پیش 10 روز

    “Fast-forward to day?” “Indentions?” Are you not a native English speaker?

    • Silver Cymbal

      Silver Cymbal

      پیش 10 روز

      Correct, I am from New Jersey

  85. James Belcher

    James Belcher

    پیش 10 روز

    Less material saves money when 400 million units are made with a penny of metal saved each is still 4 million dollars...

  86. Mark Wainwright

    Mark Wainwright

    پیش 10 روز

    I just feel bad for the person who wants to use the vibrator but can't because this guy locked it...

  87. Adeyemo Francis

    Adeyemo Francis

    پیش 10 روز

    Thoughts in the shower be like:

  88. Jeffro451 !

    Jeffro451 !

    پیش 10 روز

    “Because that’s the way we’ve always done it.”

  89. formertech


    پیش 10 روز

    I would guess that the holes are most often there because while modern outlets don't really require them, a lot of older outlets (which you WILL still find in a lot of houses) still need them.

  90. KameraShy


    پیش 11 روز

    "We've always done it that way." Reason enough.

  91. VGofRI


    پیش 11 روز

    They are used to dissipate heat.

  92. Daniel Bingamon

    Daniel Bingamon

    پیش 11 روز

    The holes are useful if you are connecting a cord to a "wall wart" transformer inside a chassis. You can run the wires through the hole and solder them in place.

  93. earthstewardude


    پیش 11 روز

    Holly cow! I thought I was going to get the hole truth here! So Silver Cymbal got you all to plug in turn on and drop out? With nearly 4,000,000 diode heads tuning in, he's going to make enough money to produce another crappy video!

    • Silver Cymbal

      Silver Cymbal

      پیش 11 روز

      Listen, you now know more than 99.9% of the US population. Gain friends, get dates, ace your next interview all with what you now know. If you still need more: The holes replaced the indentations that Hubell had originally used in early outlets to hold the plug in position 1:00 - what they became later is explained further in the video.

  94. Citaro SR

    Citaro SR

    پیش 11 روز

    The UK one doesn't

  95. SemperSmash


    پیش 11 روز

    I always thought those holes were a manufacturing thing. My company molds connectors and we have some electrical contacts with holes like these. They are inserted into the mold tooling and a pin is dropped into the mold and through the holes. This secures the pins in place and keeps them from sliding back during the molding process since there is a lot of pressure inside the mold cavity that wants to blow the cable out, resulting in short contacts. But these particular plugs are often molded in low-pressure machines, so sliding contacts isn't really that big of an issue. I still wouldn't be surprised if some manufacturers use the pin method since it's a quick and easy way to eliminate a mode of failure which reduces scrap.

  96. S u r f e x p

    S u r f e x p

    پیش 11 روز

    I use them to hook wires and give power...sometimes, do not try at home :)

  97. NeedForWeed


    پیش 11 روز

    2:03 “someone using a device they’re not supposed to” :|

  98. W Bayne

    W Bayne

    پیش 11 روز

    Because older homes still exist. I owned a home that was 100 years old. Super old wall sockets.

  99. W Bayne

    W Bayne

    پیش 11 روز

    Or it is designed to still accommodate older homes?

  100. MOLDY SOX


    پیش 11 روز

    100 holes will make another plug