In this video, Fluke presents common dangers associated with arc flash, as well as what to watch for. Watch additional safety videos here: bit.ly/1W9ojHa
Sometimes working on this stuff (240 volts or less) I get very reckless trying to get a piece of equipment going.. Just yesterday 3 phase 208 volts on a 35 amp breaker I was crouched over the locked up condensing unit and had a phase to phase event. I'm not joking when I say it was like an M-80 going off right in my face. No injuries. It must have touched right when the AC sign wave was peaking because it was bad. One day I know something bad could happen and I pray the circuit protection keeps doing its job. 208 volts can draw tens of thousands of amps with the ohms as low as they were being 5 feet from the 400 amp sub panel. Usually no big deal but occasionally the unexpected very violent arc flash can and will occur. Stay safe all electrical workers 🙏
Pink Mist. I remember these words from the safety meeting. "We are hooking up this room today, do not go in here or we might not even find your shoe laces."
Thank you. Never had the displeasure of an arc flash. I am a retired professor and have watched and been taught by electricians as a young boy to my retirement. Thank you to all the electricians out there. Your colleagues kept me safe.
I survived an arc flash. A 3 phase 220 volt panel grenaded in my my face. I got lucky. The panel door deflected the blast. I was open the door to reset a breaker when the panel exploded. If I had been just a bit sooner opening the door I would have gotten my face blown off.
💯 agree. I have the highest respect for electricity. I repair circuit breakers and I've seen some really burnt out ones. Big chunk of metals melted like butter. 😵💫 ⚡⚡
Was researching Wadsworth panels not tripping and stumbled onto this video. I am an electrician and currently doing some work in a house that has a Wadsworth panel (I explained to the customer that panel needed changed and she understood and said ok.) I was changing an outlet that I thought it was dead, the breaker was OFF, or so I thought. A previous DIY'er had reversed the wires in an upstream outlet box, white was hot and black was neutral. My tick tester only went to the black wire and didn't beep. I unscrewed the black wire first with an impact and as I touched the white wire the impact the shank also touched the side of the box... sparks flew... breaker NEVER tripped.
Thinking of lightning's electrical current, and how electrical paths from lightning can cause the completion of the circuit, we can now figure out in detail the two types of arc flash events: Phase-to-phase - this means ionizing electrons from one metal object to another metal object (given the metallic objects are too close to each other) created an air gap good enough for charge separation to set off the arc flash. Phase-to-ground - this means a metallic object got too close to or touching (contacting) metal that goes to the ground, or metal that is on the ground, causing the same air-gapping, electron ionization and resultant charge separation to set off the arc flash. Also..... Combustible dusts that happens anywhere these two events happen can also cause the arc flash if the heat or charge separation (along with enough oxygen) to set off a spark is good enough for these dangerous flashes.
maybe industry can incorporate a new method/pc board that views the needed electrical measurements and sends them to a device/receiver a safe distance away like a radio frequency signal add on to the panel box that sends the required info to a battery powered hand held device. the new key fobs in autos comes to mind as they have many functions as they are. 🙂
This is the only video, where a person knows what they are talking about arc flash. Precisely said 4 times hotter than the surface of the sun rather than saying just the sun.
@@sto2779 a transmition lines can have arc flash? And arc flashes have the same power than the cable? If a cable have 1000 Volts and 100 A = 100 000 Watts the flash will have the same wayts? Or its just heat?
i stopped at the look out spot in Pacifica .... a light rain began ... then to my right a arm sized bolt zigged to roof of my car ...... bzzzzzzzz ..... I looked around other drivers started cars and jammed ... as second bolt hit .... i sat there realized hey that wasnt lightning ... no sky flash .....no thunder .... i tingled .... i feel different. i call PGE .... have you called the media or police ....nuh nuh no i say ... i see a wire about 4ft off ground. 30 minutes and pge truck was there .... maybe ive been effected .... the signs telling you how fast you going were out. anyway ...
Making something tension-free is not that difficult. Simply switch off the consumers and measure at the fuses whether there is still current flowing (measure three times, the second time on a current-carrying conductor to check your meter). Placing the fuses is something completely different. Fluke should make an instrument that measures the impedance on the outgoing side, so that you know what current to expect when you place the fuses. Unfortunately, they don't have something like this in their range. You can measure with your ohm meter, but this one measures the direct current resistance. Not the impedance.
when i was a teenager, a friend of mine taught me how to build a carbon arc flash device on my parents home electrical system, and we used it to melt lead and scare cats and other fun things......
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I've had an arc flash once when working on home 220V, so not much power. Luckily debris from ceramic insulator didn't hit me.
How can you locate and trace voltage without power? I have to assume your not an electrician. We require voltage to trace faults. It's like turning off a car engine then trying to figure out what's broken without ever running it. It's called HOT WORK. 60% of work electricians do has to be hot work. Wear PPE, follow rules, be as careful as possible then say a prayer. Lack of attention to work will put you in the ground.
@@Tre16 so no temp poles, you don't install power on site? No troubleshooting? Just new construction with a master license? I'm talking about MCC repairs, ats installs, rewire existing services, service replacements? Then your missing millions of dollars doing TURN KEY work. Go for it man. No commercial or residential repairs?
I grounded out a single phase terminal on a 440 3phase while roughing a new wawa a few years back.. one of the scariest moments I’ve had in the field for sure who tf cornrows about 70grounds all together and throws em all behind the already shitty organized neutrals for the next guy to come undo..
Some dumb-ass that didn't know what they were doing!! (nor did they care!) I wish we had Wawa's here (CT), awesome place to get a sandwich in the middle of the night!!
why are the most important videos like safety videos always the most corny boring sleep inducing videos. you guys can in fact make them interesting you know.. so people will stay awake and be interested
Arc flash - a non-explosive electrical flash which gives off high heat and can cause severe burns or shock, and even death. Arc blast - much more dangerous - is an explosive electrical flash which can cause not only severe burns or electric shock - but also fractures, and also even death. Like an arc flash, an arc blast gives off high heat but also there is the pressure wave of the explosion which can lead to severe physical consequences as well. Examples of arc blasts happen during explosions on electrical transformers when they fault.
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I'm a recently retired Electrician, 45 years.
Just the words Arc Flash, Arc Blast scare the shit out of me.
Sometimes working on this stuff (240 volts or less) I get very reckless trying to get a piece of equipment going.. Just yesterday 3 phase 208 volts on a 35 amp breaker I was crouched over the locked up condensing unit and had a phase to phase event. I'm not joking when I say it was like an M-80 going off right in my face. No injuries. It must have touched right when the AC sign wave was peaking because it was bad. One day I know something bad could happen and I pray the circuit protection keeps doing its job. 208 volts can draw tens of thousands of amps with the ohms as low as they were being 5 feet from the 400 amp sub panel. Usually no big deal but occasionally the unexpected very violent arc flash can and will occur. Stay safe all electrical workers 🙏
take care pls
Pink Mist. I remember these words from the safety meeting. "We are hooking up this room today, do not go in here or we might not even find your shoe laces."
Thank you. Never had the displeasure of an arc flash.
I am a retired professor and have watched and been taught by electricians as a young boy to my retirement. Thank you to all the electricians out there. Your colleagues kept me safe.
There is 700,000 Electricians in America.
182,500 have experienced Arc Flash.
None are available in under 3 weeks.
And here I am I don't even like hooking up a 12v battery 😂😂
I don't always give talks on the dangers of arc flash... but when I do, I make sure to wear earplugs.
Wayland Jennings WHAT? Can’t hear ya?
And wear my hard hat on crooked
I survived an arc flash. A 3 phase 220 volt panel grenaded in my my face. I got lucky. The panel door deflected the blast. I was open the door to reset a breaker when the panel exploded. If I had been just a bit sooner opening the door I would have gotten my face blown off.
What was the cause of the arc flash?
That is why you turn your head when messing with a disconnect. Might prevent blinding and blows directly to the face.
Take that back, you stand off to the side and turn your face away.
@@ethanweeter2732Better erase the previous comment, you got the second right, but somebody can get confused with the first one.
I repair welding equipment for a living, arc flash and arc burns , very bad deal. Respect electricity always, no matter what the voltage.
💯 agree. I have the highest respect for electricity. I repair circuit breakers and I've seen some really burnt out ones. Big chunk of metals melted like butter. 😵💫 ⚡⚡
thank u mr. john fluke
The day u take a shortcut is the day you will have an arc event
Personal protection is most important. Nothing less than Face shield, Eye protection, Gloves and Hearing protection.
This was very educational.
Was researching Wadsworth panels not tripping and stumbled onto this video. I am an electrician and currently doing some work in a house that has a Wadsworth panel (I explained to the customer that panel needed changed and she understood and said ok.) I was changing an outlet that I thought it was dead, the breaker was OFF, or so I thought. A previous DIY'er had reversed the wires in an upstream outlet box, white was hot and black was neutral. My tick tester only went to the black wire and didn't beep. I unscrewed the black wire first with an impact and as I touched the white wire the impact the shank also touched the side of the box... sparks flew... breaker NEVER tripped.
So, ¿the breaker wasn't off to begin with?
Thinking of lightning's electrical current, and how electrical paths from lightning can cause the completion of the circuit, we can now figure out in detail the two types of arc flash events:
Phase-to-phase - this means ionizing electrons from one metal object to another metal object (given the metallic objects are too close to each other) created an air gap good enough for charge separation to set off the arc flash.
Phase-to-ground - this means a metallic object got too close to or touching (contacting) metal that goes to the ground, or metal that is on the ground, causing the same air-gapping, electron ionization and resultant charge separation to set off the arc flash.
Also.....
Combustible dusts that happens anywhere these two events happen can also cause the arc flash if the heat or charge separation (along with enough oxygen) to set off a spark is good enough for these dangerous flashes.
With that, working with anything silver on energized electrical equipment creates the highest danger because silver is the greatest conductor.
wow, simple, informative, great clip, very, very well done. 5-6 arc flashes/day, still? youch!! sad.
Hot as the sun in 1 millisecond and circuit breaker takes about 16 milliseconds to trip. Wow!
maybe industry can incorporate a new method/pc board that views the needed electrical measurements and sends them to a device/receiver a safe distance away like a radio frequency signal add on to the panel box that sends the required info to a battery powered hand held device. the new key fobs in autos comes to mind as they have many functions as they are. 🙂
Do they got extra extra long probs to measure the voltage from a distance lol that’s what I would use
An arc flash sounds like the man made equivalent of lightning
This is the only video, where a person knows what they are talking about arc flash. Precisely said 4 times hotter than the surface of the sun rather than saying just the sun.
Can i make a question to you?
@@guilhermearaujo1350 sure
@@sto2779 you understand about arc flash right?
@@guilhermearaujo1350 Sort of but not years of experience about it. They are extremely dangerous when high voltage is involved. As shown in the video.
@@sto2779 a transmition lines can have arc flash? And arc flashes have the same power than the cable? If a cable have 1000 Volts and 100 A = 100 000 Watts the flash will have the same wayts? Or its just heat?
Im hit a new low? high? ended up watching safety electrical hazards, where are the cats now ....
i stopped at the look out spot in Pacifica ....
a light rain began ... then to my right a arm sized bolt zigged to roof of my car ...... bzzzzzzzz .....
I looked around other drivers started cars and jammed ... as second bolt hit ....
i sat there realized hey that wasnt lightning ... no sky flash .....no thunder .... i tingled .... i feel different.
i call PGE .... have you called the media or police ....nuh nuh no i say ... i see a wire about 4ft off ground.
30 minutes and pge truck was there ....
maybe ive been effected .... the signs telling you how fast you going were out.
anyway ...
iam so glad i was never out of the shop.
Thanks 😊 so much ❤
Making something tension-free is not that difficult. Simply switch off the consumers and measure at the fuses whether there is still current flowing (measure three times, the second time on a current-carrying conductor to check your meter). Placing the fuses is something completely different. Fluke should make an instrument that measures the impedance on the outgoing side, so that you know what current to expect when you place the fuses. Unfortunately, they don't have something like this in their range. You can measure with your ohm meter, but this one measures the direct current resistance. Not the impedance.
Like when I see the prices of your meters. 20 years ago they were fairly priced.
I’m lucky, never had to use or specify US standard switchgear!
when i was a teenager, a friend of mine taught me how to build a carbon arc flash device on my parents home electrical system, and we used it to melt lead and scare cats and other fun things......
I've had an arc flash once when working on home 220V, so not much power. Luckily debris from ceramic insulator didn't hit me.
Ive seen some good face offs in hockey but..
I hope the guy in the video is ok 🧐 that thing sparked in his face
My butt does this after taco bell
You can be the best electrician on your job town or city but all it takes is one time and it can get ugly
Dear land lord. This is why YOU MUST HAVE A CERTIFICATE OF OCCUPANCY..one of the many reason 0:58
Why not cut the power when you have to open a panel....
How can you locate and trace voltage without power? I have to assume your not an electrician. We require voltage to trace faults. It's like turning off a car engine then trying to figure out what's broken without ever running it. It's called HOT WORK. 60% of work electricians do has to be hot work. Wear PPE, follow rules, be as careful as possible then say a prayer. Lack of attention to work will put you in the ground.
@@doughnut4867 95% of what electricians do is installing lol. New construction we don't have power till the near end.
@@Tre16 so no temp poles, you don't install power on site? No troubleshooting? Just new construction with a master license? I'm talking about MCC repairs, ats installs, rewire existing services, service replacements? Then your missing millions of dollars doing TURN KEY work. Go for it man. No commercial or residential repairs?
Yeah... Just shut shit off. I'm sure the rest of the people in the hospital... Or refinery... Or any other critical operations, won't mind.
@@doughnut4867 I'll bet you could do some of that with the power off, using test equipment?
Why would the voltmeter cause an arc flash?
Reduced the distance (air clearance) between the terminals
I grounded out a single phase terminal on a 440 3phase while roughing a new wawa a few years back.. one of the scariest moments I’ve had in the field for sure
who tf cornrows about 70grounds all together and throws em all behind the already shitty organized neutrals for the next guy to come undo..
Some dumb-ass that didn't know what they were doing!! (nor did they care!) I wish we had Wawa's here (CT), awesome place to get a sandwich in the middle of the night!!
It's only 440 across phases, you had 240 440 sounds better
I just lost a relative because of this.
I just randomly stumbled on this shit. Maybe picked up some valuable piece of knowledge.
So Fluke is a real person?
Time ago
www.ebay.com/itm/John-Fluke-412A-High-Voltage-DC-Power-Supply/332626549398
Yes, I saw him on MTV's Amp back in 1997 when they still showed music videos th-cam.com/video/DAQISes7iXU/w-d-xo.html
Was just a fluke.
Joshua Fluke is a youtuber who talks about corporate issues.
I thought the + sign was where I put my screw driver
Don't use your meter set for current to measure high voltage. Not fun. Only 70A at 220VAC.
this is all a fluke!
why are the most important videos like safety videos always the most corny boring sleep inducing videos. you guys can in fact make them interesting you know.. so people will stay awake and be interested
People have to grow up and pay attention.
Arc Flash= SUN farts in your face for a millisecond.
Farts to the face of ANY kind are No bueano...
basically arc welding gone rogue......yikes😵💫.
Louie the lighting bug taught me all i thought i need to know....till.that day.....respect GOD power
Arc flash - a non-explosive electrical flash which gives off high heat and can cause severe burns or shock, and even death.
Arc blast - much more dangerous - is an explosive electrical flash which can cause not only severe burns or electric shock - but also fractures, and also even death. Like an arc flash, an arc blast gives off high heat but also there is the pressure wave of the explosion which can lead to severe physical consequences as well.
Examples of arc blasts happen during explosions on electrical transformers when they fault.
LIghtning strikes from thunderstorms are also examples of arc flashes and arc blasts.
Tiktok comment section brought me here