Dangerous Chinese Power Extension (+ wire maths & circuit breakers explained)
ฝัง
- เผยแพร่เมื่อ 14 มิ.ย. 2018
- So I managed to make a 22 minute video about a piece of wire :). Actually, I made a thorough analysis of a cheap and dangerous power extension from China for LED strings or anything else. I explain some calculations of a voltage drop on its resistance and the power dissipation. I also talk about calculating the conductivity (inverse of resistivity) of a wire. The tripping curves of circuit breakers are also explained. And of course, the video contains some stupid and dangerous experiments with a short circuit and lots of smoke :).
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It's transparent to see when the wire is getting red...
I would only use a transparent insulation if the wire was a thick copper. This wire really isn't something the maker should want to reveal :).
DiodeGoneWild true
NIK - Impossible. It has got the CE sign.
Curely in China red is the color of fashion ...
@@vicfitti2008 lmao
20:48 - +DiodeGoneWild
As an American viewer, that 0.0062 mm^2 wire bundle you were blowing up converts to 39 AWG, which has a chassis wiring ampacity of only 110 mA and a power transmission ampacity of only 17.5 mA. You were pegging that poor wire right to its safe limit with that incandescent light bulb.
It's not 0.0062mm², it's 0.062mm². Still only 29AWG so way too thin. Proper extensions like this have 18AWG or 20AWG cable, so if a short occures, the breaker will trip first.
Ah, you're right, I'm not sure where I thought that extra 0 came from.
@@user-tz3fd8hm4qare you sure you don’t mean 16 or 14 AWG?
@@mattdude I mean extensions with no earth wire, which are only rated for 2,5A at 230V mains. For that current 18AWG or 20AWG would be enough. But the extensions with earth need 16AWG cable for 16A at 230V. Of course, I mean the european ones.
Wiring ampacity is 27,5 w and power transmiting wattage is 4,375 w
⚠️Warning!⚠️
You get close to the end of the cable!
☠️*DANGER!*☠️
You get very close to the end of the cable!
BbrrttWiiuuuoooosh
One of the highly underrated channel. You deserve a lot more subscribers.
15:50 very nice, it also has color changing feature 😊
And the best of all it acts like a fuse, so you don’t have to go all the way to main panel to switch on the tripped circuit breaker 😉
Ok that is disturbing... The green flame colour could be Zinc, which would match up well with the conductivity measurement and the low melting point.
But seriously, not even the chinese would resort to sending people cables made of ZINC would they!?
I didn't notice any green flame. Did you? But maybe they just came accross a lot of scrap zinc... It could also be some alloy of 2 or 3 metals like Copper + Aluminium + Iron. Some alloys of iron may not be magnetic...
DiodeGoneWild; You might be right about the iron alloy. The blueish-green colour is just there for a moment, left of the main lighter flame, which makes me suspicious that it could be a galvanized alloy.
It could also have come from copper, but if so, then why does the colour only happen for a moment once you heat a piece of wire up? The coppery colour was underneath of the silver, so should theoretically be present in the bulk material. Also, I really don't think they would use copper in the bulk of the wire, since brass, bronze or some copper-iron alloy would be more expensive than simple aluminium or even copper coated aluminium.
DiodeGoneWild; Could you perhaps find a piece of the wire which is still unburnt, and put it into some vinegar? Seeing which part of the wire (if any) reacts, should help narrow it down quite a bit. (Sorry if I'm being overly neurotic about this... I just really dislike unsolved mysteries XD)
I've just put it into vinegar. No immediate reaction. Let's wait what happens.
DiodeGoneWild; Awh, it probably isn't Zinc then. I think you're right on about it being iron based.
Sorry for the wild goose chase, and thank you very much for accommodating my curiosity. :)
This next part is purely speculation for interest's sake. I'm obviously not suggesting that you spend even more time on this than you already have.:
(The simplest confirmatory test that I can think of, would be to precipitate the Fe as its hydroxide. However, that would require dissolving the wire in a strong acid, like swimming pool HCl or H2SO4 (or perhaps just electrolyzing some acidified salt water to corrode the anode?), and then basifying the solution with drain cleaner NaOH, also known as caustic soda, to look for a brown precipitate.
Unfortunately, I'm an electrical engineer, so my chemistry knowledge is somewhat lacking...)
It is the new Apple iFuse.
+Henri Tuhola -
YES , but the CLASSIC Apple iFuse ...
because its already established: the conductors of the PCB vaporize while the real fuses last forever th-cam.com/video/298QWlHtNaQ/w-d-xo.html
You need to put end od the wire to the Apple
Flame went out. 🎉 😂 😮😊❤
simple test for copper or alumnium wire, burn wire with lighter, copper just blackens, aluminium bends and goes weird
I'm going back through your older videos. This is my favorite by far- Very informative.
Diode, You are the hero we need! Wonderful video once again. I agree with you on the point of the vacuum cleaner cord.
We need the cat back
The cat will be back in the next video :).
I like the dog just me.
we need the pup
CATS
TH-cam should require every video to include at least one cat.
This stuff really scares the shit out of me.
Not because í would have something like that in my house, but the non-tech-savvy neighbours who think a wire is a wire would just buy that and connect their microwave through it...
I live in an apartment building with neighbours below me and beside me...
Maybe i should post the link to this video on our message board in the grand hallway for everyone to see and go watch this, as this should be considered mandatory knowledge (imo).
Thanks for investigating these atrocities to mankind!! :D
I really enjoyed the mathematical explantations in this video:) Keep up the great work. And please do be careful.
Only this guy can talk about a cable for 20 minutes
Exactly what I was thinking
but so much more educational then Electroboom
@@rogerd4559 electroboom is basically just clickbaiting with stuff that blows up lol
We used to have these crappy Chinese extension cords in the U.S too, such as 100 foot long orange cords that were maybe 20-22awg wire inside, but these have disappeared most everything I see now is of decent quality, but you do have to be careful buying from eBay ect.
10:17
the caption would be like trrrshieww!
😂😂😂😂😂😂😂😂😂😂😂😂😂
I just told myself that I want to watch something from diode gone wild and then I look at my notifications... yey
Love all your vids!! You do a very good job in explaining the theory and operations in all your vids!
1:16
Infinity power
Fake power
Wooosh
I think you will never run out of content, you can make anything interesting :)
These cables are used for christmas lighting especially LED. Some lights even come with these extensions. Not meant to be used for anything else.
Not meant to be used for anything else doesn't mean it won't be used for anything else :).
I agree this is ONLY made for LED lightchains . There the plugs fit waterproof...
Never ever use it for different purpose!!!
You wil have a lighter for your carpet...
@@pandabaerhellas what if led light string shorts out? Thus should have been used for cheap phone or speaker wire, not power...
It has 250v labelled on the plug.
If that were the case, then it would, at minimum, need to have a fuse for its rated current to even begin to meet any sort of standards. However, it's poorly constructed and the plugs themselves are non-compliant. In other words, it's not even supposed to be used to power Christmas lights.
It does seem strange to make an extension cord this flimsy. On the other hand it does make a good fuse. I use speaker wire to power up a few low power led light bulbs it works great.
I get the impression this extension cord was weight optimized. Obsiously thinner wires are cheaper, but the costs savings are small and wether the cable costs €2 or €2,10 won't hurt sales that much. However, weight is a big factor: In order to be able to get it delivered for free to your door, it is necessary that it is matches the international postal rules for letters. International treaties require postal services to deliver letters for relatively low prices and this is the mechanism that allows for the free delivery. But in order to be accepted as a letter, the cable has to fit in a max weight. The free delivery does make a big difference in sales and therefore perfectly explains the chocie for an extremly thin cable.
There is a quite perverted mechanism at work here: Producers adjust to the rules of the market. The market demands weight optimization and producers are willing to sacrifice safety in order to reduce weight.
So in other words, thanks capitalism?
You forgot for Zatec. Remember, safety first :))
The brand of my fire extinguisher depends on my location :). I have Zatec in the "cat location" and other brands in the "dog location" :).
They should've advertised this as a cost effective plug n play smoke bomb
Or "get rid of idiots through natural selection" device
It seems that the extension cable is only intended for Christmas tree lights when viewed from the size of the socket. A Christmas light plug will fit in that socket, but not a normal European plug.
I think we have to blame the seller for giving an exaggerated description.
Thank you. I can finally sleep on something (calculation video) you cured my sleeping problems and the video is great too. Nice job
Love your crazy videos! Great experiment!
Awesome experiment and excellent explanation! Thanks!
Men love ur crazy side. Can spend hours on ur vids. Good job
As always best explained.
Your "danger" voice is really something, could be used as a warning signal in some lab or sth like that, like, you did there a perfect voice and perfect pronounciation
Came for the danger, stayed for the accent.
That's one crappy bit of wire.
The 5 or 13 amp fuses in u.k plugs give some protection, but you have nothing :-(
i've noticed car jump start cables that are not made from solid copper, aluminium wires with a thin coating of copper, that won't help to start a car, cheap crap!!.
I have the 16A circuit breaker :). If someone in the UK plugs a EU appliance using a cheap adapter, it's only fused by the 32A breaker. The same applies to dodgy appliances with UK plug, but no fuse in it. In any country, people have to be a bit wary what they plug in.
Is brass really used for conductors? It's more expensive yet less conductive than aluminium. To me it doesn't make much sense. And also using just pure copper, you make a wire of the same resistance, but thinner and cheaper.
Ooops i got that wrong, more like a brass coating on something else.
It was about 6 years ago and it looked wrong, too light and shiney.
It must have been aluminium wires with a coat of brass, sorry my memory is getting a bit mixed up.
It didnt look right.
zx8401ztv This is not the only Version of plugs in the EU. A bigger plug with more safety features.
@Vinyl Hendrickx A 50m reel (1.5mm2 copper) has a total resistance of 1Ohm. A short circuit on the end of that cable will give you a peak current of over 200A which is more than enough to trip your 20A breaker (might even trip the main breaker).
Most of those reels have a builtin breaker (the little red button that pops and can be reset).
There are also some smaller reels (10m) using only 0.75mm2 copper and even those should be safe to use as long as you don't chain a bunch of those or overload them (check the rating on the reel).
I absolutely love your handwriting! I wish I could write like that let alone spell well. Lol
a great man with intersting videos nice job
Thank you very much for beautiful video share..
Keep up the good work. All the best from Northern Ireland.
Seriously worrying extension and an unknown quantity will have been imported..
This video is awesome. Sure you test and destroy a very inexpensive item but the fact you're showing the many calculations is excellent. I really hope your videos help educate children and encourage them to work in this field. :)
He is a modern day Tesla
Damn I learn so much from this channel. I never knew that about the breaker trip current gap.
You said that in Europe the most common breaker type is B, however here in Italy ist almost always C, i don’t know why, since we don’t tend to use particularly large inductive loads, it would be much more sensible if we used B types...
I actually laughed out loud at the bit at 9:54.
Awesome . Thanks keep making These please :)
It looks like the plastic used in those suction cups, with its purplish hue.
Really nice video, very informative too. Thanks
Great video, I've learned a lot, thank you!
i saw this being sold by a different seller as a Christmas light extension which would make a lot more sense given the clear insulation and thin gauge wire
If my extension cord got short circuit it can be used again?
Actually i have learned a lot about fuses from your video
15:22 why is that green mcb tripped?
Thats scary! I really cant believe these things are allowed. The plug looks like it would fit an old style UK 5 amp socket now most commonly seen as shaver sockets then at least would be fused at 1 amp which MITE just be ok. Although I cant ever see any one here using them they have no real use here
Well, they certainly don't meet European standards, so they are not allowed. But no one is checking things you directly buy from China. Yet another reminder to be careful when buying on eBay.
They must be allowed. The plug was clearly marked "CE" 😀
Tony Walton: but it didn't have the "QC Passed" sticker so obviously this one was a reject that got sent by mistake. I'm sure this is actually a quality product.
/s
+Tony Walton -
CE = "China Export" www.climbing.co.za/wp-content/uploads/2013/05/ce_logo.jpg
www.china-gadgets.de/app/uploads/2017/04/CE-Vergleich-2-2.jpg
www.china-gadgets.de/ratgeber/kennzeichnungen-ce-gs-fcc-etc/
@@tonywalton1464 CE Chinese Export!
Very interesting and enjoyable, thank you
my closest guess is surplus wire used for tyre production - not for the main threads but the wire that is cut in pieces and mixed with the rubber
Excellent video
In Vietnam, everybody uses speaker cable for extension cords. Meanwhile when we go camping we have a green paint drenched 30m speaker cable then if there is a power point, we cook with induction.
Ohh man! i wouldn't trust that cable even on 12v, that is soo bad. Very comprehensive video!
Great smoke test and cable calculations.Those Chinese extension leads are very dangerous.
Love these stupid experiments :D you have such a nice handwriting tho O.o
If the wire is 3m long you need to multiply by 2 or doesn't that matter for AC ?
holy man thats lot of dangerous "fusible" cable ( 27 A?). The math really helps to understand to not going too cheap on extensions.
Are there the formulas on your website? Thanks! P.S. YOU ARE THE BEST
ive seen that on the end of christmas tree lamps end, and thats ok for extending the lamps because they draw like 100mA or less. But if you plug something else it will burn.
Another great video. THANX.
I occasionally buy some clip leads from China. I have received some CCA ones (copper clad aluminium) but also tinned or copper plated iron ones. You can recognize the last ones easily - the wire is attracted by magnets.
When they inevitably break (either by running more than 2 amps through it, or because the connection between wire and clip breaks) i just replace it with some salvaged proper coper wire.
Proper clip leads are hard to find - the local electronics shop also sells the chinese ones that quickly break - although they do use copper wire.
It could cause a shock, it could catch fire. It's nice!
let's run a heater 2000w through the cable, i bet you will smell the cable! Nice vid
In the US it is very common to see extension cords without fuses that aren't rated for the circuit breakers capacity but at least they're not nearly as bad as the one shown in this video. In the US circuit breakers on outlet circuits are typically 15 amps and its very common to see extension cords rated for only 13.5 amps.
But at least that's in the same magnitude. So to say, it will not ignite with a little overcurrent, just run somewhat hotter than designed, but will trip the breaker on short circuit.
This shows how the proper educational movies should look like.
"And today I have a dog instead of a cat."
I am laughing out loud. This is my type of comedy.
Thank you it is very informative video.
i love your voice and your videos... really nice :)
Awesome sound effects DWG lol.
I'm sure people have said this but, as an American, your Czech accent is quite intoxicating, Danyk. P.S. wish we used 240v for everything instead of our split phase 120-0-120 system. It just requires thicker wires, and having two phases in the house can be confusing sometimes.
My guess would have been that the wire is pot metal, but normally that’s mostly zinc. I’m quite puzzled now.
Dokázal bys udělat reverse-engineering tvého spínaně-lineárního zdroje z vykopávek ? Ten systém předpětí pro regulátor mě velmi fascinuje !
Hey! at least the insulation was fireproof on that dodgey extension cord but it will still set your cardboard on fire or couch or whatever you have around
That is very *Dangeru......* oh wait!
Thanks for the video =)
You have to think by the positive way, at least this cable acts like a fuse when there is a short citcuit 😂
I wouldn't use that cord for USB power. 5v 1A would blow that wire.
How much is the surge current.
Even my cheap-ass speaker set comes with speaker wire thicker than that
As far as i know this type of cable is forbidden in the EU because it's easy to misalign the plug and have one pin exposed and the other pin connected to mains.
Yes, and it aslo allows you to plug in appliances that have to be grounded. There are some 2-wire extensions in the EU, but those have the socket in a deep recess to prevent those situations.
10:17
Need to use that sound on my channel
Why at 7:00 when you start calculation you devide everything and you have written x/(z*z)?
because x/(y*z) is the same as x/y/z. It's faster to type the latter into the calculator.
That is probably not an electrical grade cable, but likely a Special Effects prop cable made for action movies and such, accidentaly manufactured into an extension cord. haha
Love your videos and the doggy.
Super explanation 👏👏😃😃😃👍👍👍👌👌👌
Chinese power extension with integrated inrush current limiter and short circuit fuse
wires flashing while burning:
"as you can see it can create a lot of special effects"
lols
At least you can see what's inside. There are some very thick cables that the internal wires are much thinner than the declared value.
This man is genius!
Its a special "winter edition" cable.
I think this was made only to feed the Christmas LED lights LOL
That cable is most likely designed for those cheap blinking Christmas lights
10:07 absolutely amazing 😂
1 week ago i bought a micro usb cable and it got broken by my mistake. And it's wires are actually 2 times thicker than this extensions cable. 😂
Can you please teardown any 12" rechargeable table fan with 6v 4.5AH battery? With schematic of circuit??
I believe those are for "decorative use only" such as only Christmas lights and such. It also appears to have that recessed plug so that the male plug seats into it and maybe even fit moisture blocking maybe. Surely that wasn't sold as an actual extension cord, that would be crazy!
I have same extension. It cames with very cheap Christmas lights.
Since when do people read the instructions on Christmas lights?
They will see the niiice shiny metal and think it is strong.
In January it gets cold they will use it to plug in a space heater.
Turn it on and then go to the apartment building lobby to check the mail.
For me, I'd probably wanted a extension cord to also have an earth connection. And wow, that thing is so dangerous. I wonder why do they even allowed it to be on sale.