People who joke about legos haven’t stepped on this bad boy

  • Devial@discuss.online
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    1 day ago

    Best plug+receptor design in the world for electrical safety.

    Worst plug design in the world for bottom of foot safety.

    • poopkins@lemmy.world
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      2 hours ago

      There’s no UK standard for three-phase and high amperage sockets or plugs. In fact, UK sockets don’t support 16A three-phase at all, so if you have higher power needs (for example for EV charging) you’re left with having to install a dedicated wall box that uses an entirely different connector than the 3-pin UK plug, BS 1363.

      Given this incompatibility, how can you argue that UK sockets are better, for instance, than SN 441011?

      To say nothing of how comically giant every appliance plug needs to be, regardless of how low its wattage is?

      • Devial@discuss.online
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        6 minutes ago

        I did notably just say that the plug is the best in the world for electrical safety. I’ve made no claims of it’s usefulness or convenience outside of that.

        I am also unaware of any country on the planet that uses the same plug/connector for general purpose household devices and 3 phase power. The number you provided, SN441011, also just leads to relatively generic household plug that doesn’t seem fit suited for multi phase use either, so not sure what you’re trying to say. I’ve also rarely seen places outside of industrial environments that have multiphase outlets, except in America, which has split phase power, and uses the voltage boost by going phase to phase instead of phase to ground. There’ll you’ll do often find 240V split phase outlets for high power appliances like shop heaters, electric clothes driers or EVSE

        To say nothing of how comically giant every appliance plug needs to be, regardless of how low its wattage is?

        It’s a minor nuisance yeah sure, but it also has the nice advantage that there’s no need to fully mould plastic around it. UK plugs are pretty much universally openable, meaning you can repair them yourself if a fuse dies, or one of the wires comes lose. It’s also really easy, and literally all you need is a single screw driver, to swap a working plug over onto a cable who’s plug has broken.

        But even so, it’s again not a safety issue so not exactly relevant to my poing.

    • Horsecook@sh.itjust.works
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      1 day ago

      Best plug+receptor design in the world for electrical safety.

      That’s debatable. The plug safety features only exist because of the UK’s uniquely substandard wiring.

      • Devial@discuss.online
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        22 hours ago

        No it isn’t. It’s debatable if the safety features are still necessary with modern wiring and electric code imporovments, but the features are objectively there, and they objectively make the plugs safer.

        And the design of these features wasn’t because of “substandard” wiring. It is because the UK used to use ring circuits in old houses, which are unsuitable to be protected by central breaker boards with breakers for each room, necessitating fuses in the plugs. That doesn’t make the system any less safe. As long as a fuse is present, and the circuits are adequately sized, where precisely on the circuit a fuse is located is irrelevant.

        Also, the fuse inside the plug provides an utterly unique advantage that no other country has: The fuse can be used to protect the external wire from over current. Centralised fuses are exclusively designed to prevent over current on the main, internal circuit, they don’t give a crap what happens on the other side of an outlet. A central fuse protecting a 16A circuit will do nothing to stop you from pulling 15Amps through a 3 amp cable. A fuse inside the plug, appropriately sized for those 3 Amps, will in fact protect the cable itself. This is particularly useful for extension cords. Other countries without fused plugs need to either just flat out mandate ALL extension and multiplug cords be capable of safely handling the maximum current of a household circuit (e.g. Germany) OR just ignore that rather major safety hazard entirely and just kinda hope that nothing bad happens (e.g. USA) (if you’ve ever wondered, that’s specifically why chaining extension cords together in the US is considered dangerous)

        • devedeset@lemmy.zip
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          13 hours ago

          The USA approach to this is to mandate a comical number of outlets everywhere (to prevent extension cord usage), mandate a large number of individual circuits (especially for things that draw a large amount of power), and more recently some combo of AFCI/GFCI/CAFCI breakers (to provide some level of sensing things going wrong and shutting off power).

          The stats are not great for the USA in terms of number of fires. I haven’t done deep research. From personal experience, most homes built after modern US electrical code was fleshed out are generally fine. Modern homes (or ones upgraded to modern code) seem very safe - the “smart” breakers tend to actually work.

          My anecdote here is that my relatively small hometown area (15,000 people, largely built up between 1860-1940) still has frequent fires relating to electrical and heating systems and the current city I live in (95,000 people mostly built up starting in ~1960) has very few fires ever. I spend 2 weeks a year around Christmas back in my hometown. 3 of the last 7 years had a structure loss fire while I was there. In the same period of time there have been 2 structure loss fires in my current city total.

        • deegeese@sopuli.xyz
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          22 hours ago

          So you’re not saying it’s because the wiring is substandard, but because it’s ring circuits, which are not up to the same standard as if they used a breaker panel.

          Isn’t that the same thing?

          • Devial@discuss.online
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            21 hours ago

            No, because the rest of the world isn’t America.

            Those ring circuits WERE up to UK standard, and perfectly safe when they were constructed, and nowadays are either still covered by the standard, or grandfathered in, meaning at minimum in existing buildings, they still in fact are up to UK standard.

            The reason other counties don’t use ring circuits isn’t because they’re less safe or inherently worse in any way, which the term “substandard” clearly implies. It’s because they’re less convenient. It’s easier and more convenient to make and use, and easier in terms of individual steps, to make safe seperate fused circuits instead of a ring circuit.

            The reason the UK used ring circuits was because they use much less copper conduit, and given the massive copper everything shortage in the UK during and after WWII, the convenience of modern circuits simply wasn’t worth it.

            • Horsecook@sh.itjust.works
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              13 hours ago

              The reason other counties don’t use ring circuits isn’t because they’re less safe or inherently worse in any way, which the term “substandard” clearly implies.

              Yes. That is the reason.

              If a ring circuit suffers a break in the live wire anywhere along its length, it fails dangerous. It will appear to be functioning properly right up until the wiring in the wall catches fire.

              The only way that ring circuits could be considered somewhat safe is if they were clearly labeled and regularly tested for continuity.

                • Horsecook@sh.itjust.works
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                  10 hours ago

                  When the live wire in a branch circuit breaks, the only path for current is severed. Anything prior to the fault continues to function as designed, anything past the fault does not function at all.

                  In a ring circuit, there are two paths. When the live wire is severed, only one path is broken. The other path continues to function, but it is now able to draw current greater than what the wire is capable of carrying. Everything on both sides of the fault will continue to function, but not as designed.

            • Rivalarrival@lemmy.today
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              19 hours ago

              The standards the UK adopted pass higher voltages and higher currents per household circuit than pretty much anywhere else. They adopted standards that allow them to use use less wiring, less copper to provide the same energy. They can plug in many space heaters on one circuit, where two or three would blow a breaker on a US circuit.

              That higher voltage and higher current makes their household circuits inherently more dangerous than household circuits outside the UK. A fault in a UK circuit passes a lot more energy than a similar fault elsewhere, before tripping a current-limiting device. The exact same fault in a UK circuit is far more dangerous than in a circuit pretty much anywhere else in the world. The standards for household wiring in the rest of the world are a lot more restrictive than the standards adopted in the UK.

              UK plugs on Japanese appliance in Japanese houses (for example) are overkill. The safety provided by the UK plugs is built into the Japanese breaker panel and wiring. Putting the UK plug/socket into a Japanese circuit provides no significant additional safety benefit. The Japanese plug/socket on a UK circuit would be extraordinarily dangerous.

              • Devial@discuss.online
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                18 hours ago

                The higher voltage has nothing whatsoever to do with ring circuits. The UK runs on the same 220-240V AC as all of mainland Europe. And Africa. And most of mainland Asia. And South America. And Oceania. And most of the middle east. So not quite “higher than any other country”

                Also those two claims are diametrically opposed to each other. Unless UK people use over twice the amount of electricity than Americans, the higher voltage will lead to LOWER total current. That’s quite literally the specific and sole motivating factor behind choosing a higher grid voltage.

                And the current a conductor can pass has nothing whatsoever to do with it’s safety. You could have 50 amps blowing through a circuit, if it’s at 12V you can still touch it without getting a shock. Your car battery is capable of peak currents of several HUNDRED amps, and those are considered safe enough to just carry around by random people with bare hands.

                Again, the amount of current passed depends only on the voltage, which again, is the same in the UK as all of mainland Europe (and most of the rest of the world except America and Japan), and has been since the early 20th century, so I’ve no idea what you’re trying to go on about there.

                And lastly, no it isn’t. For one, the child safety shutters on all UK outlets are certainly not contained in a Japanese breaker panel. Neither are the fuses in the plug, which protect the external wiring. And nor is the insulation on the lower legs of the contacts contained in a breaker panel. The Japanese plugs are basically the same as American. You can literally get an electric shock if you hold them wrong whilst unplugging. There’s exposed live contacts from when you start unplugging until the prongs break their connection to the outlet.

                Basically everything you said is demonstrably false. I’ve rarely seen someone be this confident and this incorrect about something.

                • Rivalarrival@lemmy.today
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                  18 hours ago

                  Again, the amount of current passed depends only on the voltage

                  Electrically, current depends on voltage and resistance/impedance. In practice, (and most importantly to this discussion), current draw actually depends primarily on the characteristics of the current limiting devices such as breakers, fuses, etc. Breakers on UK household circuits are designed to allow considerably more power than comparable breakers around the world.

                  This is the primary factor I am talking about.

                  Neither are the fuses in the plug, which protect the external wiring.

                  Those fuses are not needed in Japanese (or North American, or most other) plugs. We don’t need to protect the “external wiring” separately from the household wiring: the household circuit breaker is rated lower than the “external wiring”. Drawing a direct short on the “external wiring” in a UK circuit is not sufficient to trip the UK circuit breaker in the UK distribution panel; they need a secondary current limiter (a fuse) to provide that function.

                  We don’t need fuses in our plugs, specifically because our household circuit breakers are designed to trip well before your fuses would blow. (We do include fuses in any appliance or device with wiring not rated to full current.)

                  And lastly, no it isn’t. For one, the child safety shutters on all UK outlets are certainly not contained in a Japanese breaker panel.

                  The function provided by those shutters is achieved in the Japanese wiring by lower voltage, narrow holes in receptacles (allowable because they don’t need as large a contact to safely carry the lower rated current), a flared base on plugs, protective accessories for outlets in risky locations, and whole-house AFCI/GFCI.

                  • Devial@discuss.online
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                    18 hours ago

                    Breakers on UK household circuits are designed to allow considerably more power than comparable breakers around the world.

                    That is utterly irrelevant. Circuit breakers and fuses are designed for the exclusive and sole purpose of protecting the circuit from being overloaded. A 100 amp circuit with a 100 Amp fuse is exactly as safe as a 20 amp circuit with a 20 amp fuse or a 5 amp circuit with a 5 amp fuse. If the voltage is above ~100-200V, all 3 of these are hundreds of times the amount of current it would take to deliver a fatal electric shock, and none of those fuses would trip from you getting shocked.

                    To protect humans from electric shock we use residual current devices, which trip at 10’s of Milli amps. And here’s actually an advantage of a ring circuit. It forces you to place RCD protection on every single outlet in the building, instead of skimping on costs by just putting it on the branches that legally require one, like bathrooms and kitchens.

                    Those fuses are not needed in Japanese (or North American, or most other) plugs. We don’t need to protect the “external wiring” separately from the household wiring: the household circuit breaker is rated lower than the “external wiring”. Drawing a direct short on the “external wiring” in a UK circuit is not sufficient to trip the UK circuit breaker in the UK distribution panel; they need a secondary current limiter (a fuse) to provide that function.

                    That’s just demonstrably untrue. An individual branch of a household circuits in both the US or Japan can easily be fused at 20A (fun fact: European branch circuis, because of the higher voltage that you were raging against in your first comment, can handle more electric load whilst having SMALLER 16A breakers). In both Japan and America you can buy extension cords rated for 10 or 15A. So no. You just told a straight up, unequivocal lie there. And a dead short on a 240V network will literally trip everything. UK ring circuits are fused at 30 Amps. A dead short at 240V with only the internal resistance of copper wiring would pull current in the neighborhood of 1000 amps. 1000, somewhat famously, being slightly larger than 30, making this another lie there.

                    And even if it weren’t a lie, how on earth does the location of the fuse make a difference in safety here ? If it’s in the wall or in the plug, as long as it’s there and does it’s job both would be equally safe.

                    The function provided by those shutters is achieved in the Japanese wiring by lower voltage, narrow holes in receptacles (allowable because they don’t need as large a contact to safely carry the lower rated current) and whole-house AFCI/GFCI.

                    No it isn’t. 110V is still dangerous to a child, and if you think otherwise I hope to god you aren’t, or ever become a parent. Also, as I stated, your plugs literally allow for an electric shock to happen whilst unplugging them because they’re so terrible. As for whole house GFCI, that is by necessity included in a ring circuit that wants GFCI on any outlet at all.

                    Also you seem to fundamentally misunderstand the relationship of current and voltage. For a given electrical appliance, with a given wattage, a lower voltage means it needs to draw more current, not less. That’s why the US Japan need to have 20A household breakers, whereas in the EU 16A branches are more than enough, whilst still providing a higher load handling capability than a 20A Japanese fuse. A 1000 Watt microwave plugged into a Japanese socket will draw over twice as much current as a 1000 Watt microwave plugged into an EU or UK socket (which also means it produces 4 times the amount of electrical waste energy as heat, though that is generally negligible for short household cable runs either way. Can make a difference on the scale of a country though).

                    And don’t think I didn’t notice you just quietly avoided responding to any of my arguments pointing out the obvious falsehoods in your voltage claim.

                    Frankly, at this point, all you’ve done is utterly convince me that you are totally and utterly unqualified to speak on this topic. Almost every claim you make is wrong. And not even just “slightly oversimplified/technically incorrect” wrong, just straight up demonstrably untrue.

      • Annoyed_🦀 @lemmy.zip
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        21 hours ago

        UK’s uniquely substandard wiring.

        Care to elaborate on this? Imo it does sounds like a win if that’s the case.

        • Rivalarrival@lemmy.today
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          20 hours ago

          Post-war reconstruction, they had a massive copper shortage. The wiring standards they adopted allowed for using as little copper as possible. That meant fewer, high-amperage circuits, rather than many low-amperage circuits. They used “ring circuit” topology instead of “branch circuits” to allow them to use undersized wiring.

          Basically, all the shortcuts they took in their household wiring introduce considerably greater risks than exist elsewhere, including North America. Their household wiring is overloaded relative to most of the rest of the world. They mitigated the risks of their household wiring with stricter standards on their appliance wiring. Which is why they need a plug for their phone charger comparable to the plugs we use on a welder.

          It’s a good plug A damn good plug. It’s just complete overkill for electric systems outside of the UK.

          • Annoyed_🦀 @lemmy.zip
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            18 hours ago

            That makes sense, but imo for those country that follow UK standard with 220v/240v power everywhere in the house, it better be overkill than not. But then i guess that’s why EU also have this two pin plug for low power application that come with partially insulated pin, and won’t hurt your feet when step on. Best of both world!

            • Rivalarrival@lemmy.today
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              18 hours ago

              It’s not just the voltage It’s also the allowable current per circuit. UK circuits allow much higher power (wattage) than single household circuits in the rest of the world. That’s why they need those big-ass plugs on each of their appliances.

    • WhatAmLemmy@lemmy.world
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      1 day ago

      Sounds like the problem is people leaving plugs lying on the ground? Otherwise known as user error.