this post was submitted on 26 Dec 2025
474 points (98.6% liked)

xkcd

14264 readers
87 users here now

A community for a webcomic of romance, sarcasm, math, and language.

founded 2 years ago
MODERATORS
 

xkcd #3186: Truly Universal Outlet

Title text:

Building Inspectors HATE This One Weird Trick

Transcript:

Transcript will show once it’s been added to explainxkcd.com

Source: https://xkcd.com/3186/

explainxkcd for #3186

top 50 comments
sorted by: hot top controversial new old
[–] pelya@lemmy.world 106 points 3 days ago (1 children)

The only truly universal solution

[–] kamen@lemmy.world 8 points 2 days ago

It might be a final solution too if you're not careful...

[–] Skullgrid@lemmy.world 99 points 3 days ago (2 children)

I think Randal would enjoy my plug adapter

[–] ook@discuss.tchncs.de 117 points 3 days ago (1 children)

Ugh, what a shameless plug

[–] WhyIHateTheInternet@lemmy.world 34 points 3 days ago (1 children)

You try spending your whole life getting penetrated by various foreign objects and not feeling shame

load more comments (1 replies)
[–] otter@lemmy.ca 16 points 3 days ago (3 children)

This also makes me wonder why the xkcd one was laid out like that. Is the xkcd one better/safer, or was it done that way to look more insane.

On yours, the Canada/US and UK layouts overlap, while in the xkcd one they're opposite to each other.

[–] guy_threepwood@lemmy.world 2 points 12 hours ago

N/L are “reversed” on the UK BS1363 standard vs US/EU Earthed plugs. By having two sets of N/L you can ensure that they are always correctly wired.

This is often why some adaptors seem to be “upside down”

Most devices can handle N/L being swapped, though.

[–] RandomStickman@fedia.io 38 points 3 days ago

or was it done that way to look more insane.

Yeah I think that's it lol

[–] Skullgrid@lemmy.world 13 points 3 days ago

I think it's because mine doesn't have Schuko (type f) support ... probably because it's real? And maybe because his adaptation uses "Euro"/A combination, wheras mine uses vertical axes for the "euro" plug.

[–] AwesomeLowlander@sh.itjust.works 57 points 3 days ago* (last edited 3 days ago) (5 children)

I'm not sure I fully get the joke, considering the literal existence of outlets like this. Did Randall not know they exist?

[–] atthecoast@feddit.nl 11 points 2 days ago (1 children)

Typical wall outlet in china. Any plug will hang loosely in there and work. Dangerously

[–] Alcoholicorn@mander.xyz 4 points 2 days ago

Only if the socket is worn out and you are using a plug without inherent safety mechanisms.

[–] _stranger_@lemmy.world 19 points 3 days ago

Randall isn't suggesting a universal wall plug, he's suggesting you cut holes in your existing plates to make them "compatible". (At least that's how it reads to me)

[–] mech@feddit.org 9 points 2 days ago

I'm guessing seeing one of these was the starting point for this cartoon.
Also wouldn't surprise me if he threw in 1-2 types that don't exist.

[–] quinkin@lemmy.world 8 points 3 days ago (1 children)

Plenty don't fit that. Type i for instance.

Can't speak for all of them, but type I does fit

[–] Caspase8@aussie.zone 5 points 3 days ago (1 children)

These were all over Vietnam when I travelled there. Didn't even need an adapter.

load more comments (1 replies)
[–] gabelstapler@feddit.org 37 points 3 days ago (2 children)

As an engineer, thinking of designing the metal connectors needed for this, this gives me nightmares.

[–] hperrin@lemmy.ca 64 points 3 days ago* (last edited 3 days ago) (1 children)

Simple, just use a metal mesh in each hole. Make sure it’s a really thin mesh too, like practically steel wool. Pushing 1500 watts through steel wool has never caused anyone any problems ever.

[–] felbane@lemmy.world 8 points 2 days ago

thisisfine.gif

Good news, you can just buy them from China at pennies :D

[–] sukhmel@programming.dev 16 points 3 days ago (4 children)

Seems to be incompatible with some plugs, after all:

Danish computer equipment outlet with asymmetrically tilted prongs and half-circular ground (mainly used in professional environment). Nicknamed "dumb face sockets" in Denmark

For some reason the image doesn't seem to work for me, so here's the link to it, too

[–] ayyy@sh.itjust.works 4 points 2 days ago (1 children)

The embed looks fine for me using Voyager through sh.itjust.works with a ‘muricuh IP.

[–] cabillaud@lemmy.world 1 points 2 days ago* (last edited 2 days ago)

Thunder user here, works fine

load more comments (2 replies)
[–] yermaw@sh.itjust.works 21 points 3 days ago (1 children)

Im not an electrician in any way shape or form, so I dont know if my slightly panicky sweaty-behind-the-knees reaction to this is appropriate, but it scares me

[–] Skullgrid@lemmy.world 7 points 3 days ago (3 children)
[–] Remember_the_tooth@lemmy.world 16 points 3 days ago (1 children)

They might also enjoy your electrical adapter.

load more comments (1 replies)
load more comments (2 replies)
[–] ksigley@lemmy.world 5 points 2 days ago

There really is an xkcd for everything.

[–] mlg@lemmy.world 10 points 3 days ago

I actually have a really annoying problem in that I cannot find any universal adapter that has a real ground pin.

All of them only have prongs for the hot and neutral wires, and sometimes a dummy plastic ground to grip the socket better.

I understand that 99% of the time, modern electronics don't need a ground cable and its only there for safety, but it would still be a lot more comforting knowing the ground is actually connected.

I even considered modifying an adapter with a ground cable I can manually insert into the socket.

[–] jordanlund@lemmy.world 7 points 2 days ago (1 children)

What about the voltages and the hz?

[–] Knock_Knock_Lemmy_In@lemmy.world 5 points 2 days ago (1 children)
[–] Alcoholicorn@mander.xyz 4 points 2 days ago (1 children)

Put the plug in upside down to get 220V.

You can switch from 60hz to 50hz by rotating the plug fast enough

[–] wolfrasin@lemmy.today 12 points 3 days ago (1 children)
[–] SmackemWittadic@lemmy.world 6 points 3 days ago* (last edited 3 days ago)

Psh tp-p-p Psh tp-p Psh-Psh

Psh tp-p-p Psh tp-p Psh-Psh

Psh tp-p-p Psh tp-p-p Psh tp-p

Psh tp-p-p Psh tp-p Psh-Psh

[–] ultrahamster64@lemmy.world 9 points 3 days ago

That lowkey looks like christmas tree

[–] DarrinBrunner@lemmy.world 6 points 3 days ago (1 children)

I have faith that we will eventually standardize plugs internationally. Assuming we avert the apocalypse, that is.

[–] Geth@lemmy.dbzer0.com 18 points 3 days ago (9 children)

We can't agree which one is best. When Tom Scott proclaimed his home plug to be the best I scoffed. I thought my own home plug is better. But in reality I think they all suck in their own way, every single one of them.

I think a new more research driven approach like the USB-C design would be better, something that protects your fingers, is easier to locate when behind furniture or in the dark, works in more than a single position, is not going to stab you if you leave it on the floor, does not get stuck in the socket, I think it might even be possible to add a fuse without making it larger than a typical phone charger, but to be honest, the smaller the better. One can only dream.

[–] pelya@lemmy.world 28 points 3 days ago (1 children)

Randall himself already solved this problem

[–] 2910000@lemmy.world 5 points 2 days ago* (last edited 2 days ago)

For up to 480W of fun!

[–] tiramichu@sh.itjust.works 11 points 3 days ago* (last edited 3 days ago) (1 children)

Perhaps the most successful attempt at convergence so far has been the Europlug, but only because it's a weird compromise. Did you know the europlug prongs aren't actually parallel? They angle inwards slightly and have a little flex, so they can be accepted in multiple European countries' sockets that actually have slightly different dimensions! It's a cool design, but you wouldn't intentionally design it that way if you had the opportunity to standardise the world from scratch.

load more comments (1 replies)
[–] dublet@lemmy.world 5 points 3 days ago (6 children)

We can’t agree which one is best. When Tom Scott proclaimed his home plug to be the best I scoffed. I thought my own home plug is better.

The UK G type is the only one which is insulated, fused, grounded and polarized by default:

https://en.wikipedia.org/wiki/AC_power_plugs_and_sockets#Comparison_of_standard_types

This is great for electrical safety, though it's a very bulky plug.

[–] Geth@lemmy.dbzer0.com 7 points 3 days ago

Exactly. It's best technically but worst for the end user. I am an end user and I would hate to be stuck with that monster of a uniderectional plug. I don't care that it washes my dishes for me if it doesn't fit in my bag and kills me in the night when I step on it.

load more comments (5 replies)
[–] quinkin@lemmy.world 4 points 3 days ago (1 children)

Now there are fifteen standards...

[–] Allero@lemmy.today 2 points 2 days ago

There's always an XKCD for discussing other XKCD's, isn't there?

[–] squaresinger@lemmy.world 4 points 3 days ago* (last edited 3 days ago)

That's generally the thing with decisions that don't matter much. If one option is much better, there is no discussion.

But if the benefits of either option are marginal at best, you get tons of discussion and no decision.

For example, the EU decided almost a decade ago that they would get rid of daylight saving time, and everyone quickly agreed that DST sucks, mostly because changing the clocks sucks.

Since then, the whole EU has been arguing about whether to keep summer time or winter time, even though that matters so little that we have been using both of them for decades. A week after switching DST, nobody even notices the time shift.

That's why at work if a discussion goes on for too long I usually point out that that's the case because all options are almost equally as good and thus we should just pick a random one instead of continuing to waste time discussing in circles.

load more comments (4 replies)
load more comments
view more: next ›