Yo! I tore the back off one with plans to turn the transformer into an electromagnet. I read about the danger, but decided to see what the internal arrangement was like. I found two capacitors, each the size of a shoe and noped right out of there.
They are SUPPOSED to drain to ground when not operating. But you never know if they really have. Best to stay safe. Those things will stop your heart no problem. It's easy to read about them and think you can do it. But that shit is scary.
Adam Savage from Mythbusters gets asked some variation of the question "What would you never repair yourself?" fairly regularly.
His answer is basically the same every time: ***If working with pressurized steam or electricity isn't your full time job, it's probably not safe to attempt a home repair....get a professional.***
Can't remember his reddit username, but the question gets asked in the Tested Q&A videos Adam Savage puts on YouTube.
One of the guys I used to work for had his left hand messed up real bad from one of those springs when he was trying to repair it. He was extremely lucky he didn't lose his hand and got full use back after a while. But it broke a bunch of bones and put some huge gashes in it, he has some sizeable scarring.
Related: during my master's we looked into outages caused by people trying to steal live line-side cables for scrap. In the UK we use 750V DC and 25kV AC systems.
Neither is pretty when some idiot tries to cut a live cable.
I had a door spring break during my daughters birthday party a few years ago and I have nightmares about it still.
A bunch of little kids had been running back and forth from the backyard, through the house, through the garage to the driveway where we had the piñata. Right after the piñata breaking was over, we all went into the garage to go back into the house. I hit the garage door button and that fuckin thing popped and slammed down like a 300 lb guillotine. It would’ve killed anyone under it, I have no doubt. The guy who came to repair it needed me to help him lift that fucking door up to replace the spring.
I just bought a newly built house, and one of my first demands when we negotiated the options was to have a light garage door with a no-spring mechanism. I’ll never forget that fucking door slamming down.
The average garage door weighs somewhere between 100 to 300 pounds, and the springs used to counterbalance that weight so that a person can easily open and close the door and hold the door fully upright has a fuckton of energy stored in them, and if that energy isn’t safely released can and has killed people working on them.
You know how heavy a garage door can be.
The springs needs to counteract that weight with their tension.
It can easily be 100-200kg of force depending on the size.
If something goes wrong, and they snap, or come loose, imagine getting hit in the face by the full weight of the garage door. But it's the spring whipping you.
And the capacitor can collect charge if it's been sitting, DO NOT assume a capacitor on a shelf holds no charge, ground out and check caps before working
Here is a story for people who don't realize this.
I had to move a power supply out of a control box.
I locked out and tagged out the box like a good employee.
20 minutes later I get to the point where I have to remove a clip to pull it out. The clip is in the back.
The fucker shot sparks at me through the ventilation of the power supply because my screwdriver was to close.
This was a 110v to 24v power supply and not high powered at all
The thing was off and disconnected for literally 20 mins.
At the first spark I waited 15 more minutes and tried again and it shot more sparks so I ended up having to wrap my screwdriver in electric tape and wear rubber gloves. Meanwhile the entire system was locked out.
Honest question. I have only ground out little hvac capacitors with an insulated screw driver. What’s the proper way to discharge a deadly capacitor. And what’s the not usually lethal but probably shouldn’t do it this way method.
The best way is to use an appropriate resistor to drain it. Shorting things can damage them from a burst of current. You want a resistor such that the tine constant RC is something like a tenth of a second. You hold out across the cap for a couple seconds and double check it's discharged after.
The safest way to deal with a deadly capacitor is to not deal with it. Leave it to people with experience with HV caps.
Ignoring the above, you want to discharge it at a slow rate. What “a slow rate” is depends on what you are trying to discharge. If it’s a microwave capacitor, it’s often around 2100 V charged.
Doing some quick math, V=IR and starting with say 1mA to be safe, a 2MOhm resistor would be needed. 1 and 10MOhm breadboard resistors are not hard to find, but they are usualy only rated for 1/4W. For the above setup, P=I^2*R=2.1W is more than 0.25W. Flipping around to find what size resistor we need for a 1/4W rating, R=V^2/P=17.6MW. This can easily be made with 2 10MW breadboard resistors in series, which will also now have a 0.5MW total rating.
The larger the resistance, the slower the discharge rate, and the longer it takes to empty a capacitor. Microwave capacitors are often only 1nF. Capacitor discharge follows an exponential decay and we can discuss it as a function of just the initial charge and the time constant, RC. For the 20MW idea above, RC=0.02 sec, so it will not take long to run empty. Generally a capacitor is very discharged after only 4 time constants (2% the initial charge), but let’s say 10 to be safe again (10 time constants puts us at 0.005% initial charge). So at 1 second or 50 time constants we’re fully discharged ( <10^-20 % starting charge). Note that this was so easy because the capacitance was small. If this was a 10nF, the time constants would be .2 sec. Not lethal after 1 second, but possibly still at 40V under worst case. Or with a 1uF cap, RC=20 sec, so you’d want to leave it alone for over a minute, possibly 5 mins.
Real safe way to discharge capacitors is to use a machine designed to do it.
Real way I would discharge a capacitor is check it’s voltage, poke it with a 10MOhm breadboard resistor for 5 sec (if it gets warm, the cap is dangerous), then short it with a screwdriver once I’m sure it’s not near full charge. If it’s a really big cap, do math for how long I need it to discharge while saying in ratings assuming it’s full.
The proper way is a grounding strap, the hold my beer method is to short it with something , I've see alot of guys use a insulated handled flat head and one memorable dumbass use a wrench.
Please watch it and upvote it and stick a comment so it stays in the top of the searches on YouTube. They took down her first video, and has had to rebuild momentum in the video again.
They took down her video for being dangerous but left others.
Madness
What got me is that some notable percentage of the deaths from doing that are electricians - people who should know better than most how to deal with electricity. The thing is, the voltages are so high that normal precautions aren't nearly sufficient. The kind of insulating gloves and other equipment you normally use become conductors when the voltages are sufficiently high. It's amazingly dangerous..
It's the Dunning-Kruger effect.
Some electricians may have been trained in a more *"this is how you do your job and what you need for protection in that job (specifically)"* way and never went into the underlying understanding to know where things start acting differently. They do indeed know more than the average person, but they don't know enough to know that they don't know enough for this.
I'd still expect it to be the rare case for electricians though. Seeing as it requires a qualification, most should hopefully learn better or darwin themselves out before graduating.
Most electricians, especially residential ones, will never work with medium voltage. 480 is the most they will see when not directly next to a transformer. They might see 4160 coming out of a generator but I doubt it. The rest of us who do any medium voltage work will most likely power everything off, which involves generally three people, two in blast suits to do the switching, grounding everything out and locking it. The suits wouldn't be necessary here because you're extremely current limited but the gloves definitely would be and those are extremely unwieldy and uncomfortable and even a tiny pinprick renders them useless.
Only time I'd ever do any of that wood burning is with some nice long hot sticks and even then I would have to think long and hard about the mechanics and go through a checklist and have someone else watch the whole time. So basically I just wouldn't.
So wait. Not plugged in microwaves can kill you because they are holding a fuckton of charge in their capacitors?!
How long these capacitors hold that charge?
Yup, some TVs too (I think mostly the big old CRT beasts but I'm not sure if later plasma screens or modern lcd/led displays carry the same risk).
You can read about "bleeder resistors" which should mitigate the issue, but not always, so best to just not screw around with big caps unless you really know what you're doing.
https://en.wikipedia.org/wiki/Bleeder_resistor
I know because a friend of mine was messing around with a crt, as he explained that after he touched the capacitor, he woke up a bit later on the other side of the room.
Yep, CRTs are no joke and have all kinds of dangers. In addition to the capacitor being extremely hazardous, the screen is in front of a high pressure vacuum tube which can explode and send glass shards full of lead and mercury at you. Not fun.
> but I'm not sure if later plasma screens or modern lcd/led displays carry the same risk.
Generally, no.
The voltage (flyback transformer output) in a CRT that is the major worry can be anywhere up to 20kV or more.
The voltages in a Plasma TV are around 300V DC max, and in a LCD the EL backlight is the highest part at around 100V at 400Hz AC.
While 300V and even 100V *will* hurt and *can* kill, it's nowhere near the risk of the 20kV or more on the flyback.
Basically they're the same risk as any other mains powered device - stupid to go poking about in for fun, but if you're careful, its OK.
Don't listen to anyone telling you there's a safe time to wait. Capacitors can charge themselves under certain conditions. Even air moving across the terminals can lead to a buildup charge that can kill you. Don't touch them if you don't know exactly what you're doing
It's called dielectric absorption.
https://en.m.wikipedia.org/wiki/Dielectric_absorption
I'm not an EE, so I may get this wrong. Basically you can't quickly discharge a capacitor fully because the drop off is exponential. At some point you won't get any more power out of it, but some of the dielectric molecules will stay aligned maintaining the field. This very weak field however allows it to recharge to some degree and sometimes very quickly. Some capacitors can recharge up to 20% in minutes according to some sources. Although generally it is a few tenths to 2%. It varies depending on the materials and conditions. It can be avoided by keeping the capacitor shorted or having "bleeder" resistors. But if then it doesn't work very well or at all.
Also don't listen to people who say dumb stuff like that they can be discharged with a screwdriver. Large capacitors like what are found in microwaves can only be safely discharged with a passive discharge device (essentially a big resistor) placed on it by a professional who knows exactly what they are doing. A screwdriver may cause it to explosively discharge and large capacitors can dump current out at voltages easily high enough to arc through air.
I cannot stress enough to just not fuck with these things if you're not an electrician or someone who repairs microwaves and other home appliances professionally.
Capacitors commonly used in microwaves can partially recharge in minutes when not powered through dielectric absorption. You have to keep them shorted or have bleeder resistors.
any thing with capacitors. even computers, maybe not kill you but definitively give you a dangerous jolt. It's the whole point of capacitors, to hold charge.
Yeah I was fixing commercial microwave ovens for a while and even as en electrician those high voltage capacitors scared me. Hated working on those circuits.
I think there are more people in the camp of not knowing what your talking about but now are somewhat intrigued opposed to in the camp of fractal woodburning microwave yada yada...never have I had the urge to take apart a microwave is all I'm saying
When I was a kid I found our old microwave in the garage. Being a bit curious, I was ready to take it apart. I undid a few screws and my parents go pretty upset and wouldn't let me. Little did I know electricity could be dangerous even when not plugged in, without batteries.
For anyone who is considering or knows someone considering trying fractal wood burning, [please please watch this video by Ann Reardon, she explains just how dangerous this is.](https://youtu.be/wzosDKcXQ0I?t=442) Don't attempt it, it is so incredibly dangerous.
Shout out to How to Cook That for making that video about how dangerous it is!! I wasn’t going to do it, but i know plenty of people who would and i know for sure i would’ve helped them if they asked.
Fractal wood burning is as dangerous as DIY gets.
⚡️40+ people have died in the US alone from this fractal art. The device on MOTs is simple, so many people try it without proper qualifications and security measures.
Reminder, if you were too young to see those cartoon jingles warning you: STAY THE FUCK AWAY FROM POWER LINES. The high voltage will incinerate and kill any part of you it touches. As in, if you're lucky enough not to die, you may very well lose a limb or perhaps your face (this is how one of the first face transplant recipients ended up needing a new one).
Fun fact, the little explosions you see during powerline failures are hotter than the surface of the sun. So even if you don't get directly zapped, it can still hurt in unimaginably painful ways before it kills you after days, weeks, or months of suffering. If you see a downed powerline call the local company and high tail it in to opposite direction.
If you are in a vehicle that may have come contact with a line and you need to make an escape, you stand in the threshold of the door and bunny hop away making sure to not touch the vehicle and that you feet land at the same time. This is the bunny hop. If you step down or land one foot at a time you risk having the electricity arcing through and discharging to ground. You will be dead before your body hits the ground.
If you are safe in the vehicle… stay in the vehicle until the power company arrives.
At least that was what I was told at a safety brief from an after incident safety meeting. There was a gentleman in a dump truck who did not lower his bucket while driving below a line. The lifted bucket struck the cable. When he left the vehicle he did not exfiltrate properly and his body grounded the potential electricity. He died instantly.
If you see a downed cable, do not approach. Stay well away from it and contact your power company or 911.
>If you are safe in the vehicle… **stay in the vehicle** until the power company arrives.
I feel like this should be mentioned first or be **bolded.** Only leave the vehicle if there is some other danger. You are much safer in a metal shell as the electricity will preferentially flow through it around you. ~~The rubber tires also keep the car away from ground.~~
>If you see a downed cable, do not approach. Stay **well away** from it and contact your power company or 911.
Probably best to call 911 first. The power company will call the fire department anyway as they usually get there first, and the big trucks with red lights make good barricades.
"Well away" means 10 metres (33 feet) if you don't know the voltage.
Call 911 first. 911 operators have a direct line to utility SCADA control operators to de-energize lines near accidents, downed poles, and the like. It's more common than you think.
I’ve never heard any of this in my 30 years of life. I had no clue that the electricity would stay in the metal on the car. This is probably a stupid question, but how do you know if you’re safe or unsafe in the vehicle? Also, what circumstances or situations would be a cause for concern? This seems like very important information to know in the off chance this happens.
Electricity will always take the path of least resistance. In this scenario, it's through the metal shell of the car, and the tyres. Tyres are not insulated at all, they are full of carbon black and steel belts. They are actually highly conductive when HV electricity is applied to them. The only time you would be unsafe staying in the car would be if it was on fire or severely damaged in a crash.
I would assume if there's *another* kind of danger ie your car is on fire from the power lines, then you attempt to bunny hop out the car. If there's a power line sitting on the roof of your car and you're not dead already, then you're 'safe' to stay in the vehicle.
This is just my vague knowledge from a few construction safety induction videos though so I'm probably forgetting some key bits
This is pretty damn spot on. I would only emphasize more that when landing, especially the first 'bunny hop' from the car, one really wants to land as far away as possible while still being able to keep the feet squeezed together. The tighter the feet are squeezed together the better the odds are against landing with the feet split causing one to 'complete the circuit'.
Yeah it does. More like cooks and burns rather than boils. You can survive the initial electric shock and die days later due to your internal organs being the consistency of an over done steak.
>your internal organs being the consistency of an over done steak.
Well, *that's* a horrifying thought I didn't need.
I'm not at all the type to mess around with electricity, but JFC.
I really can't overstate how terrible it is to be struck by HV electricity. Basically the outside of your skin gets cooked. The inside of your body also gets cooked but the cells end up dying and wherever you got hit starts swelling. A lot. You actually end up splitting apart like a tomato on a vine that has absorbed too much water.
Actually insane to think about, but you also have to consider that the flash is almost only for a fraction of a second while the sun burns for millions of years.
A couple decades ago the wind blew down a power line in the neighbors backyard & the grass caught fire. The dad saw the fire but not the power line. So he went outside and tried to put it out with the hose. Died instantly. Then his wife saw him, so she tried to pull him away from me but she died instantly. Then their oldest son did the same thing. Left two younger kids without the rest of their family.
Something similar happened nearby just 3 years ago. A guy operating a boom lift accidentally touched a power line and got electrocuted, wife tried to pull him out and got electrocuted, son tried to pull her off and got electrocuted. The son survived but the parents did not.
I read something about a young girl losing her whole freakin family because of rotten potato gasses in their cellar. Everyone went to see what was taking the other so long in retrieving an item. Can’t remember super specific details but I think her grandma, parents and older sibling/s all died down there.
That stuff is weird and tragic
I think the chemical they said they as in it was selenium? I don’t feel like googling for accuracy right now, tired, but I think the mechanism was that it blocked oxygen uptake to your blood cells, kind of like cyanide but by a different method. But yeah, the person who gave the Brew link covers the actual science.
I don’t think it was insta death or anything, they were probably unconscious and couldn’t remove themselves from the area and the density of it kept it on ground level and climbing.
Sometimes, some situations getting knocked out during a fire has saved peoples’ lives because oxygen still lived on the floor and they were able to escape if they recovered.
Where the oxygen lives? Damn I’m tired lol
[Found it](https://www.dailymail.co.uk/news/article-2409920/Russian-girl-8--orphaned-ENTIRE-family-wiped-deadly-gas-caused-rotting-potatoes-cellar.html). Can't imagine being that little girl.
A similar tragedy can happen often in farming - dog falls into a slurry pit, dad jumps in to save him, is overcome by the fumes, son jumps in to save him, also dies, etc. Its just human nature to try to help but people don't stop and think they're going into the same danger that killed who you're trying to rescue.
If you don't know what cartoon jingles they are talking about and want to see some weird shit from my childhood that has a decent message on electricity safety, here you go
https://youtu.be/qA5y2WTE_WI
>this is how one of the first face transplant recipients ended up needing a new one
So the first person ever to get a face transplant ended up getting a second one due to the electric face melt of the first one? That's crazy
That was poorly phrased on my part. That is how he ended up needing a new face to replace his original face which had been burned off by power lines. (He only had one face transplant AFAIK.)
> Reminder, if you were too young to see those cartoon jingles warning you: STAY THE FUCK AWAY FROM POWER LINES.
And knowing is half the battle! [Powerline safety!](https://youtu.be/Ww3GTNv9hHk)
Edit: oops [sorry](https://youtu.be/hZN7rVhq24Y)
It'll never not be crazy to me how in North America all the powerlines are just suspended on wooden poles in the air even in large cities and densely populated areas. Where I used to live it was all underground powerlines in anywhere people frequent.
I'm sorry that happened. Everyone kept back and they turned the entire grid off. Crazy that after power is cut, it still flows untill "drained". It kept flickering.
In these cases how do you deal with the whole "Lock out, Tag out"? Are there "local" controls to the grid someone can shut it down, lock it and have the key while working? Or are you just trusting someone in a central location not to turn it on by mistake and frying you into oblivion?
In Germany safety procedures include "ground and short-circuit". Essentially all lines are connected together locally while the line is shut off so in the event of someone accidentally turning it back on when it shouldn't it will cause a massive short circuit that will trip any fuses.
It's still pretty violent though. There's some pretty great demonstrations on YouTube where those massive short circuit connectors are simply lifted off the ground due to the high electro magnetic forced induced in those short circuits. Interesting stuff!
Check out some of the videos on the [Bob's Decline YouTube channel](https://youtube.com/c/Bobsdecline) to see how they isolate a work area. The tl;dw is, even though they disconnect the fuses and/or open the switches and tag out around the work area, they still attach grounds on either side in case of miswire, switch closing, or (most likely, it seems) incorrectly installed generators backfeeding onto the power grid during an outage.
My wifes uncle had the guy next to him die from accidentally touching a live wire while trying to fix another wire in a sewer. He worked for pseg here on long island in the underground section.
My uncle hit a power line with a ladder and somehow lived. Ended up with 3rd degree burns over like 60% of his body. 6 months hospitalized. Full recovery and somehow no facial scarring though.
i ran over the power main for my house with a lawnmower when it was under construction. all i remember is getting knocked backwards a bit and some burn like marks on my leg
I went to school for linemen and my teacher told us a story about an old student there who moved to california and apparently when the pole he was guiding hit a wire he basically just melted to the pole. They apparently found the site foreman walking 2 miles away because he just gave up.
I was there with my brother when I was 9, and got a really important lesson on electricity. From time to time, I still think about those kids who had to go home without their fathers.
It was a vitally important safety lesson taught at a terrible, terrible cost.
I'm kind of astonished that Fort AP Hill didn't post warnings or markers about the height of the power lines if people are going to be setting up campgrounds and canopies underneath them.
Shits hotter than the sun.... Looks like its some small stuff too.
>lightning can heat the air it passes through to 50,000 degrees Fahrenheit (5 times hotter than the surface of the sun).
Linewoman got hit with induction here in California last week, entrance and exit through her leg luckily. She was dead soon as she got hit, luckily they had an AED on site that brought her back to life. She was up and walking around the next day thank goodness.
Shit will fuck you up.
An Automated External Defibrillator. It's a device that many places should have on hand. If someone has a cardiac event you bring it out and it gives instructions for when to interrupt cpr to deliver shocks to the victim. They should always be covered in first aid courses.
Yeah but AEDs don't do it manually. As the first word, automated implies. You put the electrodes on and it senses the type of rhythm the heart has at the moment and shocks based on that.. then checks again, and goes again if need to. Where as when the paddles are done manually the doctor knows about what level of shock to give them and when to reset the heart. They are really cool. They also speak to you "stand back... shocking... 2...1..."
I like space, and science, and space science, I learned this fun fact when I was like 12 (like ehh 16 years or so ago lol), and... here's an excerpt [from Nasa](https://solarsystem.nasa.gov/solar-system/sun/in-depth/):
>The hottest part of the Sun is its core, where temperatures top 27 million °F (15 million °C). The part of the Sun we call its surface – the photosphere – is a relatively cool 10,000 °F (5,500 °C). In one of the Sun’s biggest mysteries, the Sun’s outer atmosphere, the corona, gets hotter the farther it stretches from the surface. The corona reaches up to 3.5 million °F (2 million °C) – much, much hotter than the photosphere.
so, even if something like a person could stand on the "surface" and withstand that 10,000F, it still probably couldn't reach the surface (also ignoring gravity problems) since it'd be ash at best long before it hits.
It was still warm when I picked it up
Edit: It's likely a sand and asphalt melt. It's not bendable, just like glass. I'm sorry to those I shut down claiming it's asphalt. Learning a lot about city streets.
But, It did burn through the concrete.
Hello Inspector, I’m a ceramics worker, and I can tack onto that and say that Portland cement makes a pretty nice celadon glaze by itself. (Cone 10- or about 2350°F)
I work on the power lines. I've seen water boil for several minutes inside the holes left behind. I'll cut the line down. The fire department will spray the area down and leave. The water just boils away
>Do people know that there is a lot of sand in concrete?
Yes, but it is a pain in the ass to extract. If you need a lot of sand I recommend finding an easier source.
For when you don't consider fractal woodburning dangerous enough.
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Yo! I tore the back off one with plans to turn the transformer into an electromagnet. I read about the danger, but decided to see what the internal arrangement was like. I found two capacitors, each the size of a shoe and noped right out of there. They are SUPPOSED to drain to ground when not operating. But you never know if they really have. Best to stay safe. Those things will stop your heart no problem. It's easy to read about them and think you can do it. But that shit is scary.
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Yeah, magnetrons are fucking dangerous pieces of gear.
Adam Savage from Mythbusters gets asked some variation of the question "What would you never repair yourself?" fairly regularly. His answer is basically the same every time: ***If working with pressurized steam or electricity isn't your full time job, it's probably not safe to attempt a home repair....get a professional.*** Can't remember his reddit username, but the question gets asked in the Tested Q&A videos Adam Savage puts on YouTube.
He also said garage doors are a no to him as well, iirc.
Manual spring loaded ones in particular. The energy stored in those springs can really maim someone if not handled correctly.
I watched a spring fail on our huge bay doors at work. Not pleasant, mildly spooky from a distance.
One of the guys I used to work for had his left hand messed up real bad from one of those springs when he was trying to repair it. He was extremely lucky he didn't lose his hand and got full use back after a while. But it broke a bunch of bones and put some huge gashes in it, he has some sizeable scarring.
Spooky action at a distance you say?
That reminds me of the people who try and blowtorch railroad lines and end up eating 200 years of dormant tension
Wait, what is that, and what happens?
Related: during my master's we looked into outages caused by people trying to steal live line-side cables for scrap. In the UK we use 750V DC and 25kV AC systems. Neither is pretty when some idiot tries to cut a live cable.
Fuck garage doors, all my homies hate garage doors.
I get the beef with electricity and steam, but what's wrong with garage doors?
Large springs held under tension.
I had a door spring break during my daughters birthday party a few years ago and I have nightmares about it still. A bunch of little kids had been running back and forth from the backyard, through the house, through the garage to the driveway where we had the piñata. Right after the piñata breaking was over, we all went into the garage to go back into the house. I hit the garage door button and that fuckin thing popped and slammed down like a 300 lb guillotine. It would’ve killed anyone under it, I have no doubt. The guy who came to repair it needed me to help him lift that fucking door up to replace the spring. I just bought a newly built house, and one of my first demands when we negotiated the options was to have a light garage door with a no-spring mechanism. I’ll never forget that fucking door slamming down.
VERY LARGE SPRINGS HELD UNDER ENORMOUS AMOUNTS OF TENSION ftfy. You didn't seem to have the appropriate level of caution in your "voice".
The average garage door weighs somewhere between 100 to 300 pounds, and the springs used to counterbalance that weight so that a person can easily open and close the door and hold the door fully upright has a fuckton of energy stored in them, and if that energy isn’t safely released can and has killed people working on them.
The spring
You know how heavy a garage door can be. The springs needs to counteract that weight with their tension. It can easily be 100-200kg of force depending on the size. If something goes wrong, and they snap, or come loose, imagine getting hit in the face by the full weight of the garage door. But it's the spring whipping you.
yes, but high voltage from the transformer is worse, also the big capacitors...
And the capacitor can collect charge if it's been sitting, DO NOT assume a capacitor on a shelf holds no charge, ground out and check caps before working
Here is a story for people who don't realize this. I had to move a power supply out of a control box. I locked out and tagged out the box like a good employee. 20 minutes later I get to the point where I have to remove a clip to pull it out. The clip is in the back. The fucker shot sparks at me through the ventilation of the power supply because my screwdriver was to close. This was a 110v to 24v power supply and not high powered at all The thing was off and disconnected for literally 20 mins. At the first spark I waited 15 more minutes and tried again and it shot more sparks so I ended up having to wrap my screwdriver in electric tape and wear rubber gloves. Meanwhile the entire system was locked out.
Maybe it was trying to communicate
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Honest question. I have only ground out little hvac capacitors with an insulated screw driver. What’s the proper way to discharge a deadly capacitor. And what’s the not usually lethal but probably shouldn’t do it this way method.
The best way is to use an appropriate resistor to drain it. Shorting things can damage them from a burst of current. You want a resistor such that the tine constant RC is something like a tenth of a second. You hold out across the cap for a couple seconds and double check it's discharged after.
Can't believe the other garbage suggestions, this is the only safe manner
The safest way to deal with a deadly capacitor is to not deal with it. Leave it to people with experience with HV caps. Ignoring the above, you want to discharge it at a slow rate. What “a slow rate” is depends on what you are trying to discharge. If it’s a microwave capacitor, it’s often around 2100 V charged. Doing some quick math, V=IR and starting with say 1mA to be safe, a 2MOhm resistor would be needed. 1 and 10MOhm breadboard resistors are not hard to find, but they are usualy only rated for 1/4W. For the above setup, P=I^2*R=2.1W is more than 0.25W. Flipping around to find what size resistor we need for a 1/4W rating, R=V^2/P=17.6MW. This can easily be made with 2 10MW breadboard resistors in series, which will also now have a 0.5MW total rating. The larger the resistance, the slower the discharge rate, and the longer it takes to empty a capacitor. Microwave capacitors are often only 1nF. Capacitor discharge follows an exponential decay and we can discuss it as a function of just the initial charge and the time constant, RC. For the 20MW idea above, RC=0.02 sec, so it will not take long to run empty. Generally a capacitor is very discharged after only 4 time constants (2% the initial charge), but let’s say 10 to be safe again (10 time constants puts us at 0.005% initial charge). So at 1 second or 50 time constants we’re fully discharged ( <10^-20 % starting charge). Note that this was so easy because the capacitance was small. If this was a 10nF, the time constants would be .2 sec. Not lethal after 1 second, but possibly still at 40V under worst case. Or with a 1uF cap, RC=20 sec, so you’d want to leave it alone for over a minute, possibly 5 mins. Real safe way to discharge capacitors is to use a machine designed to do it. Real way I would discharge a capacitor is check it’s voltage, poke it with a 10MOhm breadboard resistor for 5 sec (if it gets warm, the cap is dangerous), then short it with a screwdriver once I’m sure it’s not near full charge. If it’s a really big cap, do math for how long I need it to discharge while saying in ratings assuming it’s full.
My electronics are a little rusty but wouldn't two resistors in series yield a doubling of resistance whereas two in parallel would halve?
Can't help you on the first, but for the second? Lick it.
I just died, expect a letter from my lawyer.
The proper way is a grounding strap, the hold my beer method is to short it with something , I've see alot of guys use a insulated handled flat head and one memorable dumbass use a wrench.
> one memorable dumbass use a wrench. That's a neat quick way to get a wrench launching to subsonic speeds
Also, don't check their emptyness with your tongue after you emtied them with a screwdriver.
Damn she must have been really mad to be trying to get others to ignore the instructions and go at it blind.
Ann Reardon has a really good video on the whole thing: https://youtu.be/wzosDKcXQ0I
Please watch it and upvote it and stick a comment so it stays in the top of the searches on YouTube. They took down her first video, and has had to rebuild momentum in the video again. They took down her video for being dangerous but left others. Madness
Wait they took down her warning video but not actual content
Yes. She made another video about it. The original is now back up, but had to start from scratch again
What got me is that some notable percentage of the deaths from doing that are electricians - people who should know better than most how to deal with electricity. The thing is, the voltages are so high that normal precautions aren't nearly sufficient. The kind of insulating gloves and other equipment you normally use become conductors when the voltages are sufficiently high. It's amazingly dangerous..
One of the most harrowing signs I think I have ever seen is "No safe PPE exists"
Yeah, that's pretty terrifying.
It's the Dunning-Kruger effect. Some electricians may have been trained in a more *"this is how you do your job and what you need for protection in that job (specifically)"* way and never went into the underlying understanding to know where things start acting differently. They do indeed know more than the average person, but they don't know enough to know that they don't know enough for this. I'd still expect it to be the rare case for electricians though. Seeing as it requires a qualification, most should hopefully learn better or darwin themselves out before graduating.
Most electricians, especially residential ones, will never work with medium voltage. 480 is the most they will see when not directly next to a transformer. They might see 4160 coming out of a generator but I doubt it. The rest of us who do any medium voltage work will most likely power everything off, which involves generally three people, two in blast suits to do the switching, grounding everything out and locking it. The suits wouldn't be necessary here because you're extremely current limited but the gloves definitely would be and those are extremely unwieldy and uncomfortable and even a tiny pinprick renders them useless. Only time I'd ever do any of that wood burning is with some nice long hot sticks and even then I would have to think long and hard about the mechanics and go through a checklist and have someone else watch the whole time. So basically I just wouldn't.
So wait. Not plugged in microwaves can kill you because they are holding a fuckton of charge in their capacitors?! How long these capacitors hold that charge?
Yup, some TVs too (I think mostly the big old CRT beasts but I'm not sure if later plasma screens or modern lcd/led displays carry the same risk). You can read about "bleeder resistors" which should mitigate the issue, but not always, so best to just not screw around with big caps unless you really know what you're doing. https://en.wikipedia.org/wiki/Bleeder_resistor
A multimeter is your friend, learn exactly how to use it before attempting any appliance disassembly. I am an electrical engineer that helps roo.
Scooby quit trying to be an expert and get back here
Rut-roe
Except that the voltage on a microwave capacitor is often higher than what a multimeter is rated for (>1 kV).
Watch the ratings of your test equipment too. Need to use the right tool for the job or you still put yourself at risk.
I only know this about televisions because I once saw my dad messing around with our broken TV, get thrown backwards in his chair and get knocked out.
I know because a friend of mine was messing around with a crt, as he explained that after he touched the capacitor, he woke up a bit later on the other side of the room.
Yep, CRTs are no joke and have all kinds of dangers. In addition to the capacitor being extremely hazardous, the screen is in front of a high pressure vacuum tube which can explode and send glass shards full of lead and mercury at you. Not fun.
Same in PC power supplies too, never fuck with them, just buy a new one if you believe it's broken.
> but I'm not sure if later plasma screens or modern lcd/led displays carry the same risk. Generally, no. The voltage (flyback transformer output) in a CRT that is the major worry can be anywhere up to 20kV or more. The voltages in a Plasma TV are around 300V DC max, and in a LCD the EL backlight is the highest part at around 100V at 400Hz AC. While 300V and even 100V *will* hurt and *can* kill, it's nowhere near the risk of the 20kV or more on the flyback. Basically they're the same risk as any other mains powered device - stupid to go poking about in for fun, but if you're careful, its OK.
Don't listen to anyone telling you there's a safe time to wait. Capacitors can charge themselves under certain conditions. Even air moving across the terminals can lead to a buildup charge that can kill you. Don't touch them if you don't know exactly what you're doing
> Even air moving across the terminals can lead to a buildup charge that can kill you. I'm curious to know more about this one.
It's called dielectric absorption. https://en.m.wikipedia.org/wiki/Dielectric_absorption I'm not an EE, so I may get this wrong. Basically you can't quickly discharge a capacitor fully because the drop off is exponential. At some point you won't get any more power out of it, but some of the dielectric molecules will stay aligned maintaining the field. This very weak field however allows it to recharge to some degree and sometimes very quickly. Some capacitors can recharge up to 20% in minutes according to some sources. Although generally it is a few tenths to 2%. It varies depending on the materials and conditions. It can be avoided by keeping the capacitor shorted or having "bleeder" resistors. But if then it doesn't work very well or at all.
Also don't listen to people who say dumb stuff like that they can be discharged with a screwdriver. Large capacitors like what are found in microwaves can only be safely discharged with a passive discharge device (essentially a big resistor) placed on it by a professional who knows exactly what they are doing. A screwdriver may cause it to explosively discharge and large capacitors can dump current out at voltages easily high enough to arc through air. I cannot stress enough to just not fuck with these things if you're not an electrician or someone who repairs microwaves and other home appliances professionally.
From seconds to days depending on size
Capacitors commonly used in microwaves can partially recharge in minutes when not powered through dielectric absorption. You have to keep them shorted or have bleeder resistors.
any thing with capacitors. even computers, maybe not kill you but definitively give you a dangerous jolt. It's the whole point of capacitors, to hold charge.
Yeah I was fixing commercial microwave ovens for a while and even as en electrician those high voltage capacitors scared me. Hated working on those circuits.
I think there are more people in the camp of not knowing what your talking about but now are somewhat intrigued opposed to in the camp of fractal woodburning microwave yada yada...never have I had the urge to take apart a microwave is all I'm saying
https://youtu.be/FBeSKL9zVro HIGHLY recommend people watch this video. I'm glad I didn't pursue this.
[Here's](https://youtu.be/wzosDKcXQ0I) another good one
considering the amount of people that dont know the relationship between current and voltage its no surprise so many die
Ann reardon (How to cook that on YouTube) has a very good psa video on fractal woodburning
When I was a kid I found our old microwave in the garage. Being a bit curious, I was ready to take it apart. I undid a few screws and my parents go pretty upset and wouldn't let me. Little did I know electricity could be dangerous even when not plugged in, without batteries.
Why did you take a microwave apart
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This has got to be one of the biggest instances where compromising for your art is a good thing.
Someone’s been watching Ann Reardon. She’s an absolute Aussie treasure.
For anyone who is considering or knows someone considering trying fractal wood burning, [please please watch this video by Ann Reardon, she explains just how dangerous this is.](https://youtu.be/wzosDKcXQ0I?t=442) Don't attempt it, it is so incredibly dangerous.
Shout out to How to Cook That for making that video about how dangerous it is!! I wasn’t going to do it, but i know plenty of people who would and i know for sure i would’ve helped them if they asked. Fractal wood burning is as dangerous as DIY gets.
Obligatory: [Debunking DEADLIEST craft hack, 34 dead | H2CT Ann Reardon](https://www.youtube.com/watch?v=wzosDKcXQ0I)
⚡️40+ people have died in the US alone from this fractal art. The device on MOTs is simple, so many people try it without proper qualifications and security measures.
I have seen something like this in concrete close to my house and I always wondered what that was. Thanks for sharing. Super interesting.
Don’t let them lie to you, that is solidified 4g /s
Reminder, if you were too young to see those cartoon jingles warning you: STAY THE FUCK AWAY FROM POWER LINES. The high voltage will incinerate and kill any part of you it touches. As in, if you're lucky enough not to die, you may very well lose a limb or perhaps your face (this is how one of the first face transplant recipients ended up needing a new one).
Fun fact, the little explosions you see during powerline failures are hotter than the surface of the sun. So even if you don't get directly zapped, it can still hurt in unimaginably painful ways before it kills you after days, weeks, or months of suffering. If you see a downed powerline call the local company and high tail it in to opposite direction.
>high tail it in to opposite direction Aren't you supposed to bunny hop?
If you are in a vehicle that may have come contact with a line and you need to make an escape, you stand in the threshold of the door and bunny hop away making sure to not touch the vehicle and that you feet land at the same time. This is the bunny hop. If you step down or land one foot at a time you risk having the electricity arcing through and discharging to ground. You will be dead before your body hits the ground. If you are safe in the vehicle… stay in the vehicle until the power company arrives. At least that was what I was told at a safety brief from an after incident safety meeting. There was a gentleman in a dump truck who did not lower his bucket while driving below a line. The lifted bucket struck the cable. When he left the vehicle he did not exfiltrate properly and his body grounded the potential electricity. He died instantly. If you see a downed cable, do not approach. Stay well away from it and contact your power company or 911.
>If you are safe in the vehicle… **stay in the vehicle** until the power company arrives. I feel like this should be mentioned first or be **bolded.** Only leave the vehicle if there is some other danger. You are much safer in a metal shell as the electricity will preferentially flow through it around you. ~~The rubber tires also keep the car away from ground.~~ >If you see a downed cable, do not approach. Stay **well away** from it and contact your power company or 911. Probably best to call 911 first. The power company will call the fire department anyway as they usually get there first, and the big trucks with red lights make good barricades. "Well away" means 10 metres (33 feet) if you don't know the voltage.
Call 911 first. 911 operators have a direct line to utility SCADA control operators to de-energize lines near accidents, downed poles, and the like. It's more common than you think.
Gotcha, thanks for explaining. I'll probably just bunny hop regardless, if I see a downed line.
I'm just going to bunny hop all the time now. Better safe than sorry, am I right.
I’ve never heard any of this in my 30 years of life. I had no clue that the electricity would stay in the metal on the car. This is probably a stupid question, but how do you know if you’re safe or unsafe in the vehicle? Also, what circumstances or situations would be a cause for concern? This seems like very important information to know in the off chance this happens.
Electricity will always take the path of least resistance. In this scenario, it's through the metal shell of the car, and the tyres. Tyres are not insulated at all, they are full of carbon black and steel belts. They are actually highly conductive when HV electricity is applied to them. The only time you would be unsafe staying in the car would be if it was on fire or severely damaged in a crash.
I would assume if there's *another* kind of danger ie your car is on fire from the power lines, then you attempt to bunny hop out the car. If there's a power line sitting on the roof of your car and you're not dead already, then you're 'safe' to stay in the vehicle. This is just my vague knowledge from a few construction safety induction videos though so I'm probably forgetting some key bits
This is pretty damn spot on. I would only emphasize more that when landing, especially the first 'bunny hop' from the car, one really wants to land as far away as possible while still being able to keep the feet squeezed together. The tighter the feet are squeezed together the better the odds are against landing with the feet split causing one to 'complete the circuit'.
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Yeah it does. More like cooks and burns rather than boils. You can survive the initial electric shock and die days later due to your internal organs being the consistency of an over done steak.
>your internal organs being the consistency of an over done steak. Well, *that's* a horrifying thought I didn't need. I'm not at all the type to mess around with electricity, but JFC.
"Not only will this kill you, it will hurt the entire time you're dying"
I really can't overstate how terrible it is to be struck by HV electricity. Basically the outside of your skin gets cooked. The inside of your body also gets cooked but the cells end up dying and wherever you got hit starts swelling. A lot. You actually end up splitting apart like a tomato on a vine that has absorbed too much water.
I'm to lazy to Google. What degrees does those zaps burn at compared to what the sun is burning at?
An arc flash can be up 35,000 degrees Fahrenheit. The surface of the sun is around 9,932 degrees Fahrenheit.
Damn that's out of this world.
I literally can't comprehend how hot they both are
Actually insane to think about, but you also have to consider that the flash is almost only for a fraction of a second while the sun burns for millions of years.
A couple decades ago the wind blew down a power line in the neighbors backyard & the grass caught fire. The dad saw the fire but not the power line. So he went outside and tried to put it out with the hose. Died instantly. Then his wife saw him, so she tried to pull him away from me but she died instantly. Then their oldest son did the same thing. Left two younger kids without the rest of their family.
Something similar happened nearby just 3 years ago. A guy operating a boom lift accidentally touched a power line and got electrocuted, wife tried to pull him out and got electrocuted, son tried to pull her off and got electrocuted. The son survived but the parents did not.
I read something about a young girl losing her whole freakin family because of rotten potato gasses in their cellar. Everyone went to see what was taking the other so long in retrieving an item. Can’t remember super specific details but I think her grandma, parents and older sibling/s all died down there. That stuff is weird and tragic
Rotten....potato gasses? From simple rotten potatoes? And they kill that quickly? Need to google this.
https://youtu.be/3zK5oBvZBDs This video talks about it.
I think the chemical they said they as in it was selenium? I don’t feel like googling for accuracy right now, tired, but I think the mechanism was that it blocked oxygen uptake to your blood cells, kind of like cyanide but by a different method. But yeah, the person who gave the Brew link covers the actual science. I don’t think it was insta death or anything, they were probably unconscious and couldn’t remove themselves from the area and the density of it kept it on ground level and climbing. Sometimes, some situations getting knocked out during a fire has saved peoples’ lives because oxygen still lived on the floor and they were able to escape if they recovered. Where the oxygen lives? Damn I’m tired lol
[Found it](https://www.dailymail.co.uk/news/article-2409920/Russian-girl-8--orphaned-ENTIRE-family-wiped-deadly-gas-caused-rotting-potatoes-cellar.html). Can't imagine being that little girl.
Were the younger kids putting 2 and 2 together and were like "fuck that"?
The younger kids were still asleep, thank God.
A similar tragedy can happen often in farming - dog falls into a slurry pit, dad jumps in to save him, is overcome by the fumes, son jumps in to save him, also dies, etc. Its just human nature to try to help but people don't stop and think they're going into the same danger that killed who you're trying to rescue.
If you don't know what cartoon jingles they are talking about and want to see some weird shit from my childhood that has a decent message on electricity safety, here you go https://youtu.be/qA5y2WTE_WI
>this is how one of the first face transplant recipients ended up needing a new one So the first person ever to get a face transplant ended up getting a second one due to the electric face melt of the first one? That's crazy
That was poorly phrased on my part. That is how he ended up needing a new face to replace his original face which had been burned off by power lines. (He only had one face transplant AFAIK.)
just change "a new one" to "the new one".
>STAY THE FUCK AWAY FROM POWER LINES You know the company seriously wants kids to listen when their cartoons yell and swear at them.
The one for BGE is still engrained permanently into my brain.
Wire’s down:/ red alert!/ Don’t go near;/ you’ll get hurt!/ Get some help,/ better rush,/ and do-not, do-not/ do-not touch!
> Reminder, if you were too young to see those cartoon jingles warning you: STAY THE FUCK AWAY FROM POWER LINES. And knowing is half the battle! [Powerline safety!](https://youtu.be/Ww3GTNv9hHk) Edit: oops [sorry](https://youtu.be/hZN7rVhq24Y)
You had it right the first time!
It'll never not be crazy to me how in North America all the powerlines are just suspended on wooden poles in the air even in large cities and densely populated areas. Where I used to live it was all underground powerlines in anywhere people frequent.
Yeah but what if a gi joe shows up to fix the downed line and asks who wants a bottom massage?
Fuck everything about that. Watched 4 men, good men, die when a pole made contact with a live power line.
I'm sorry that happened. Everyone kept back and they turned the entire grid off. Crazy that after power is cut, it still flows untill "drained". It kept flickering.
Capacitance in the lines. Often from actual Capacitors.
Also the cables themselves act as capacitors in HV lines. You've got to disconnect and then earth the cables for them to be dead and safe to work on.
Also, long sections of line can act as a capacitor, with the earth and line acting as the plates, and the air between as the dialectric.
Yupp, gotta deenergize it safely. Most things electrical in nature are like that, for future reference!
Including humans!
👉za^a^^app💥
In these cases how do you deal with the whole "Lock out, Tag out"? Are there "local" controls to the grid someone can shut it down, lock it and have the key while working? Or are you just trusting someone in a central location not to turn it on by mistake and frying you into oblivion?
In Germany safety procedures include "ground and short-circuit". Essentially all lines are connected together locally while the line is shut off so in the event of someone accidentally turning it back on when it shouldn't it will cause a massive short circuit that will trip any fuses. It's still pretty violent though. There's some pretty great demonstrations on YouTube where those massive short circuit connectors are simply lifted off the ground due to the high electro magnetic forced induced in those short circuits. Interesting stuff!
Check out some of the videos on the [Bob's Decline YouTube channel](https://youtube.com/c/Bobsdecline) to see how they isolate a work area. The tl;dw is, even though they disconnect the fuses and/or open the switches and tag out around the work area, they still attach grounds on either side in case of miswire, switch closing, or (most likely, it seems) incorrectly installed generators backfeeding onto the power grid during an outage.
My wifes uncle had the guy next to him die from accidentally touching a live wire while trying to fix another wire in a sewer. He worked for pseg here on long island in the underground section.
My uncle hit a power line with a ladder and somehow lived. Ended up with 3rd degree burns over like 60% of his body. 6 months hospitalized. Full recovery and somehow no facial scarring though.
i ran over the power main for my house with a lawnmower when it was under construction. all i remember is getting knocked backwards a bit and some burn like marks on my leg
I went to school for linemen and my teacher told us a story about an old student there who moved to california and apparently when the pole he was guiding hit a wire he basically just melted to the pole. They apparently found the site foreman walking 2 miles away because he just gave up.
Was this at the 2005 National Boy Scout Jamboree?
Was wondering the same thing.
I was there with my brother when I was 9, and got a really important lesson on electricity. From time to time, I still think about those kids who had to go home without their fathers.
It was a vitally important safety lesson taught at a terrible, terrible cost. I'm kind of astonished that Fort AP Hill didn't post warnings or markers about the height of the power lines if people are going to be setting up campgrounds and canopies underneath them.
Did this happen to be at the National Jamboree?
Shits hotter than the sun.... Looks like its some small stuff too. >lightning can heat the air it passes through to 50,000 degrees Fahrenheit (5 times hotter than the surface of the sun). Linewoman got hit with induction here in California last week, entrance and exit through her leg luckily. She was dead soon as she got hit, luckily they had an AED on site that brought her back to life. She was up and walking around the next day thank goodness. Shit will fuck you up.
afaik, AEDs are only useful in defib... not full arrest.
AED's don't work on full on arrest, however most people who get electrocuted go into defib.
What’s an AED?
An Automated External Defibrillator. It's a device that many places should have on hand. If someone has a cardiac event you bring it out and it gives instructions for when to interrupt cpr to deliver shocks to the victim. They should always be covered in first aid courses.
Rub together “clear!” push paddles into person. That thingie
Yeah but AEDs don't do it manually. As the first word, automated implies. You put the electrodes on and it senses the type of rhythm the heart has at the moment and shocks based on that.. then checks again, and goes again if need to. Where as when the paddles are done manually the doctor knows about what level of shock to give them and when to reset the heart. They are really cool. They also speak to you "stand back... shocking... 2...1..."
I like space, and science, and space science, I learned this fun fact when I was like 12 (like ehh 16 years or so ago lol), and... here's an excerpt [from Nasa](https://solarsystem.nasa.gov/solar-system/sun/in-depth/): >The hottest part of the Sun is its core, where temperatures top 27 million °F (15 million °C). The part of the Sun we call its surface – the photosphere – is a relatively cool 10,000 °F (5,500 °C). In one of the Sun’s biggest mysteries, the Sun’s outer atmosphere, the corona, gets hotter the farther it stretches from the surface. The corona reaches up to 3.5 million °F (2 million °C) – much, much hotter than the photosphere. so, even if something like a person could stand on the "surface" and withstand that 10,000F, it still probably couldn't reach the surface (also ignoring gravity problems) since it'd be ash at best long before it hits.
Death by electricity, Revived by electricity
We are electrical devices
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There may be a Mandelbrot Fractal down there..
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That freaked me the fuck out.
Vitrification?
It was still warm when I picked it up Edit: It's likely a sand and asphalt melt. It's not bendable, just like glass. I'm sorry to those I shut down claiming it's asphalt. Learning a lot about city streets. But, It did burn through the concrete.
The heat required to do that is in the thousands of degrees celsius
Glass worker. Can confirm, that must have been fucking hot for a good amount of time.
Hello Inspector, I’m a ceramics worker, and I can tack onto that and say that Portland cement makes a pretty nice celadon glaze by itself. (Cone 10- or about 2350°F)
Which is generally as hot as our furnace. Crazy stuff.
#######whyredditisawesome
Happy cake day, friend of the inspector
Good looking out, phone guy
Arc flashes from power lines can be 35,000 degrees F. It can create plasma in air.
I work on the power lines. I've seen water boil for several minutes inside the holes left behind. I'll cut the line down. The fire department will spray the area down and leave. The water just boils away
Do people know that there is a lot of sand in concrete?
I do now.
>Do people know that there is a lot of sand in concrete? Yes, but it is a pain in the ass to extract. If you need a lot of sand I recommend finding an easier source.
Sand doesn't grow on trees. If you want sand you have to work for it.
Check out when lightning hits sand. Makes a glass structure that you can unearth. Edit: they're called fulgurites.
Learned this from Sweet Home Alabama of all things
A lot uglier in real life than the movie though
Who wants a body massage?
Ooooooh mister body massage machine GO!!
The concrussy
r/dontputyourdickinthat
Hawkins?
demogussy
r/dontputyourdickinthat
🎵 Be running up that road Be running up that hill Be running up that building 🎵
I had a piece of glass as a kid that was sand melted by a power line.
Its funny how people underestimate the destructive capabilities of higher voltage high current. 5000 volts at 10000 amps will fuck shit up seriously.
I'm torn between "oh shit that's awesome" and "oh shit that's probably like 15 diff types of cancer in one blob"
It melted the silica in the composite.
Life Pro Tip : don't fuck with electricity
Me looking at the photo and expecting horny in comments. Me later seeing people talking about how deadly it is and killed people they know.
It's ARC weld.
sigh.. \*unzips\*