Electric Safety Presentation

August 17, 2019 posted by

Cool, hi! How many people have seen this before? How many have not seen it? Oh, cool 50/50. Uh, I give you my spiel, um, whenever anyone talks to me like I’m talking to you I always think I always think they don’t know what they’re talking about. So I want to give you my qualifications. I turned 18 May 5th, 1981. Chris and I graduated June 6th that same year. And July 6th I went to work here at Holy Cross. So I was barely 18 As you can see, that’s 32 years ago. I’ve seen a lot of good stuff electricity can do and I’ve seen a lot of bad stuff electricity can do. Today we’re going to talk about the bad. I do 5th grade classes. Usually in the 5th grade they learn about gas, water, power. They know about the atom, so 5th grade – every question I ask you today is at a 5th grade level, so you better get them. The other cool thing about this is any question you have about electricity I can show you right here. We don’t have to do K sub H times pi * r squared. Please ask me questions. It helps me out and I can show you. Okay Um, let’s go. I’m going to do some accidents. I’m going to do some basic electricity. A couple accidents We’ll do some more basic electricity and then I’ll show you a whole bunch of accidents that happen nationwide every day in America. Cool? Everybody say this: If you can see it 186,000 miles a second Say it again. (audience) 186,000 miles per second We’ll say that a lot today. We’re going to do it all again one more time. One hundred eighty-six thousand miles a second. That’s the speed of light. Electricity is just a little bit behind it. So, first 5th grade question is: What is 186,000 miles from here, Glenwood Springs (Colorado) (audience) The moon! The moon’s not quite. Any more guesses? I did this for a 5th grade class, this old science teacher, I’m looking at him like “He shouldn’t even be ALIVE, let alone teaching.” He comes up after the class, and he says, “5 times around the Earth.” And I said, “what?” and he goes, “that’s the answer to your question.” So I looked it up on my cell phone From pole to pole, it’s 24,901.55 miles. And around the equator is 24,859.82. So it’s further pole to pole than the equator. 5 times around the Earth in one second. So forget that. Just go with China. One thousand one, we’re there. Very fast. Cool? Let’s do some accidents. This is my little village. The star of my show is Burnadette. If it was a little boy, his name would be Ashton. This one’s already burnt. If you guys were 5th graders, she’d be all nice and pretty and ready to go, okay? There’s something wrong with my village. Usually it takes an older person to see it. Don’t be offended if you’re the first one to see it. Anyone? Shannon? (laughs) What’s happened here is the aerial antenna has blown into the power line. This, you guys, is 14,400 volts. Exactly what we have here at Holy Cross. Just to scale. So we’re going to learn a little bit about electricity. Burnadette is on the ground she’s safe., She goes from the ground to the ladder, she’s safe. She’s on the house, she’s safe. This whole house is energized at 14,400 volts. It’s not until she comes in contact with the aerial antenna touching the overhead power line and the ladder touching the ground that she’s going to get burnt. All electricity wants to do is get to ground. That’s how we use it. We turn on the light switch and let a little go through the light bulb, it goes to ground, we use it. Silicone chip in our computers: silicone stops it, remembers how much went through, goes to ground. That’s how we use electricity. That’s all it wants to do. We’ll explain that a little later. Ground. Ladder House She gets between the aerial antenna and the ladder touching the ground and she gets burned. She gets burnt at: (audience) 186,000 miles per second Didn’t take very long, did it? She’s done with that. She’s going to go climb in her tree house. Trees are very conductive. We’ll talk about that later. She doesn’t notice this service wire going to her house: 120V / 240V. Bared off spot. She climbs to there, she also gets electrocuted. So my point is here: way, way, less voltage same speed. K Cool Let’s talk about electricity real quick. All you 5th graders. Tell me real quick the parts of an atom. Proton, neutron, Electron. In the center of the atom is the nucleus. Nucleus is made up of protons …which are positively charged, which is how they get their name, and neutrons, which are neutral. Around the nucleus There’s a wonderful word: electron. Electrons are negatively charged. If I have an atom with the exact same number of electrons as protons, the positive charge holds the negative charge in like a magnet. It’s like a solar system. They’re going around there. So the positive holds the negative. That atom is very stable. It’s an insulator. Glass, porcelain, rubber. All very good insulators. If you were in the 5th grade, I’d pass these around tell them it’s very special rubber from Cambodia. You can’t get it, but you guys are all going to handle them today (or you did this morning). Insulator Some atoms have up to 400 times more electrons. on the outside What happens is the positive charge can’t hold the negative charges in and they fly off. As they go around the solar system they fly off. That’s called a free electron. Another good word we use is “Electricity.” That’s a conductor. Gold, copper, aluminum all have way more electrons than they have protons. Make sense? So, we start the generator in Craig, the free electrons flow from one atom to another 186,000 miles per second. They get here easy. They go back and forth, that fast. That’s alternating current (A/C) We’ve all heard that word. That’s how the water gets back to the lake. Kind of. That’s not really how it works, but that’s how it works. 186,000 miles per second, it does it very easy. Everybody cool with that? Questions? Let’s do some more accidents. This happens all the time. Happened when I was in high school at Canyon Creek on Public Service’s line. Guy was killed on our line about, oh, 7 years ago I guess now. Very same accident. But our deal is with Burnadette. She’s gone. She’s absent. Okay. Three kids are walking across a field and they spook up a rabbit and it runs into an irrigation pipe. And they want to get that rabbit. How are you going to get that rabbit? Stick it up. Kids say throw a rock down it. They say crawl in it. I say it’s 4 inches around. Pretty soon these three kids, same thing, they’re going to pick up the pipe. Slam it down, two of them, and the third one is going to grab the rabbit. When they did that, they didn’t notice the high voltage power line above them. I’m going to show you something else about electricity. Right now this pipe is taking all the electrons to ground. So it’s at ground potential. It’s like our neutral wire. We’ll talk about that a little more later. So Burnadette’s alright because she’s at the same potential, even though 14,400 volts are flowing through this pipe. But the minute they pick the pipe up She becomes the pipe. She becomes the path to ground and she gets electrocuted. So when this happened One boy lost a foot. One boy lost a hand. And the other one lost a leg. What happened to the rabbit? It’s fine? That’s correct. The rabbit doesn’t become the path to ground. Only if the electrons go through your body, which we’ll explain here in a minute, do you get burned. Make sense? Ahh, let’s go one more. Burnadette gets a little bit older She buys herself a cool Mustang car She’s headed to Glenwood Springs High School on a nice Winter day when the roads are icy. She’s texting, which is a big no-no with you 5th graders. Slips on the ice, hits the power pole, breaks this insulator, phase wire comes down on her car. Everybody cool with what’s going on? Burnadette’s in the car, she’s safe as a kitten. How come? What’s that? Not part of the circuit is the correct answer. Everybody says rubber tires Not true. Steel belted radials. If a dump truck gets in our power lines, the tires are the first things to go. She’s not part of the circuit. She’s not the path to ground. Until she steps out of the car and becomes the path to ground she’s safe. Stay in the car if it’s not on fire. Stay in the car. Call Holy Cross. We’ll make sure the power line is off. You’ll be safe. Your cell phone will work fine because it’s not part of the circuit. Okay? This happened in Pennsylvania. Family of seven. The Mustang’s taking off. A phase wire fell down on the car and the house, the mom freaked out. She told the kids to get out of the house. I don’t blame her. The house is on fire. There’s a phase wire on it. All seven kids were getting into a station wagon next to the car that had the phase wire on it. One kid opened the door, touched the other car next to it, energizing the car they were getting in. Killed all of them instantly. So, my point is if I had seven Burnadettes here, everyone would get their share of electricity in that car. There’s path of least resistance, that’s true, but I’ll show you that later. Cool? Let’s go again. Okay, let’s go to the kite. Kites. You’ve all seen them. We all have them. $4.59 kite. The kite string’s conductive. Wal-Mart now makes a kite string with a metal filament into it. that, uh keeps it from breaking Kite string by itself is conductive. That’s how… … we found electricity. A key and a kite. Okay, this kite’s on the line. How are you going to get it down? 5th graders? What’s that? “Leave it there” is a good answer. um If your local firemen come out and they haven’t had my class they’re going to use a ladder. Bad idea. Saw that before. How about a tree branch? Knock it down. Trees are very conductive. A lot of our power outages around here come from trees. That’s why we have breakers. I’ll explain it later, but Trees are very conductive. 2×4, dry wood, still the same thing. 14,400 volts How are you going to get that kite? (audience) Call the electric company? That’s the correct answer and the right answer! At the end This happened in Colorado Springs. 11-year-old kid. This exact thing happened. He was going to climb up this pole Arm for arm, 260 feet, get his kite, arm for arm back. Eleven years old. There was a shed built under the guide wire. He got on the shed, got a hold of the guide wire, swung over Phone, cable TV, perfect ladder. We’ve all seen poles like that. He gets up, gets between the phase and the neutral Is electrocuted. This kid, 11 years old with enough gumption to think he could do that lost both arms and a leg. Eleven years old. Spent the rest of his life with one leg for a $4.99 kite. Horrible story. How are you going to get the kite? Call Holy Cross. Yes, we’ll gladly come get your kite. We got all the cool trucks, cool sticks. We’ll get your kite any day of the week. You see tennis shoes on there all the time nowadays. 150 bucks. Hard thing to go home and tell your parents. Call Holy Cross. We’ll get your shoes. (audience) Do we charge for that? No, we… No. Free of charge. We’re a non-profit organization. We get the kite, though. Okay, I’m going to explain this loss of arms and legs. Everybody rub your hands together. Dave? Alright, let’s do this! Rub them, what are they doing? They’re getting warm. How come? (audience) Friction? Friction causes heat. If you could rub them together at 186,000 miles per second, what would happen to your arms? They would burn off. Just on your way home tonight, put them out on the street at 70 miles per hour and see what happens. Friction causes heat. An electrical burn All fire comes from heat, oxygen, and fuel. Yes? (inaudible) You get a shock. We’ll talk about that. That’s induction. Good question. Friction causes heat. Heat, oxygen, and fuel cause a fire. There’s no – not much – fuel in me. Running through this wall is a power line that’s running very cool. Not much heat. Feeding my village. How come it’s so cool? Low resistance. Insulation is the correct answer. It’s a very good conductor. It has lots of free electrons. Runs cool. There’ll be 4 inches of ice on power lines, drags them down, you’ve all seen it. The very second I touch that it becomes as hot as the sun. I become as hot as the sun. I’m a conductor. A poor conductor. You guys all have electric stoves, toaster ovens. The friction of the electrons going through that poor conductor heat it up. Rodney has very little fuel. 90% water. But the minute I touch that, it excites the electrons in my body – hot as the sun – it’s that fast. I’m going to burn for one week. So when a lineman gets burned, everyone’s like, “How’s Rodney? How’s Rodney?” You don’t know for one week. It’s like Wendell taking the hamburger off the grill. It’s still cooking. So, Monday I’m going to burn some more. Just a pinhole, we’ll talk about that later. Burns the flesh. They take out the burnt flesh. Tuesday there’s more. Wednesday there’s not enough muscle to use that joint. They cut it off. By Thursday I may lose it here. That’s why people lose their arms and legs in an electrical accident. It’s not that they touch the power line and their arms blow off. It burns for one week. They lose that much Meat, if you will, in their joints. Cool? What else do I got? Let’s do some more accidents. Until I do my job. This happens all the time. Lost my microphone. It happens every day. We’ve had accidents like this at Holy Cross. um Happens every day. For us 5th graders Scenario is here, a construction crew left their crane on a playground. It rained and rained and the tons of that crane made it lean over in the mud. It’s touching the power line. Burnadette wants to come play on it. She doesn’t hear this going on. Goes to climb on it. Gets electrocuted. Becomes the path to ground. The path of least resistance. Do you see that? Bob’s operating the crane, doesn’t pay attention, swings it into the power line. What happens to Bob? (audience) He’s fine. How come? He’s not the path to ground. I’m doing my job! Frank’s down here holding on to the 2×4’s. What happens? What should Bob do? Stay on there. The minute he gets off, he’s going to get electrocuted. Tires have nothing to do with it. When a track hoe digs up one of our underground power, which we’ll talk about in a minute, Solid steel on the ground, the whole thing’s energized: 14,400 volts. Cool? So let’s talk about Underground While we have time. Okay, in my power lines. Three things I need. I need a conductor Insulator And a ground. So my conductors here 4 feet of dry air insulates this. Air is a conductor, we’ll talk about that in a minute. But dry air, this 4 feet insulates this phase from the other. Okay, neutral wire. Neutral takes the imbalance back to the generator, so to speak. So Paul comes home, throws his clothes in the dryer. He’s using a little bit of electricity. Keith comes home, starts welding. He’s using a little more. I come home, dry my hair, I’m using very little. (laughs) Now, I’m talking about all the houses from here to Aspen. The difference of what we’re using comes back in here, 14,400 volts but it’s at ground potential. When us linemen climb up there we might get a little shock, but it’s like that pipe. 14,400 volts Ground potential. It’s not until we cut that wire and become the wire that we would get burnt. Make sense? Inside, underground. Exact same thing. You guys will be touching this today. Conductor Insulator. This is a semi-con that keeps electromagnetic field equal And the neutral. Exact same power is in the underground as the overhead. K Boy, I just got a question for myself. Cool Okay? So Guys, green boxes. Everybody have them? Seen them? 5th grade? Yes? Alright, good answer. Where are the green boxes? In your driveway. In your back yard. There’s little green boxes, and there’s big green boxes. Where’s the big green boxes? Where? Usually on the street corner. I’m fortunate. Almost every school I do there’s a switch gear right in the front of the school. What’s happening there is Big green boxes have fuses in them. So, an overhead riser pole has a fuse. Comes from one house to the other house. Switch gear. Switch gears have fuses in one side. They have great big switches in them. So, us linemen, we move the power from one city to the other. We close the switch, we open it. You never even see it blink. On the other side of that is a fuse. Coming out, going from transformer to transformer. The little green boxes take the 14,400 volts and make it the 120 / 240 you use in your house just like an overhead transformer. There’s 5-7 houses on an underground box. That’s why they’re in your front yards. They’re feeding your house. On this power cable that I just showed you, in the green box, is this. Load break elbow. You guys will see this today, too. Load break elbow. All it is is a 14,400 volt plugin. Just like I plug this in the wall to get the 120. 14,400 volts If I have a little case of the noodle arm, don’t plug it all the way on, car hits it Snow plows knock them on their backs all the time. Anything disturbs that transformer, it can dislodge this – I’ve seen them right against this metal to ground, sitting right there, hot. We leave them in there. 14,400 volts. Load break elbow. Cool? So, back to Burnadette. She gets in her cool Mustang car. Am I doing that right? Starting to lose my mind. Here, she doesn’t need to be tied into the overhead. She’s texting. She’s driving in the snow. Headed to Glenwood High. I might have to change her name to Becca, Lib. (laughs) Sorry. She misses the power pole this time, crashes and knocks the underground transformer over. Okay What should she do? Stay in the car if she thinks she’s involved with a power line. If she gets out of the car, she’s going to become the path to ground. Any firemen coming to rescue her and don’t know that that’s involved with an underground thing, They’re, all 7 of them, are going to get their share. Both car accidents. So I always tell the firemen, “Have your dispatch call our dispatch.” We can – people can turn the power on on us with a phone. We lock and tag that out. We ourselves don’t touch these power lines until we have an open. So if they call, 1. We know where to go. 2. We won’t energize it on them. I’ll talk about that later. Got it? Okay, another scenario. We’re at the construction site. I use a maintainer. I could use the backhoe. Like I said, solid steel track hoe digs up our power line, it’s going to be energized. 14,400 Volts. I use a maintainer because we’re supposed to be 30 inches deep. Not always the case. So in this case, Bob scrapes up the underground cable. Cuts it. Pulls it down the conduit. Pulls the elbow off the transformer. Okay Bob’s in the piece of equipment. What should he do? Why? Won’t become the path to ground. He’s like a bird on the wire. He’s energized, but the electrons are not flowing through his body. Just like us in our bucket trucks with our rubber gloves. Stops the electrons from flowing through our body. We’ll talk more about that later. He gets out of the piece of equipment Becomes the path to ground. Anyone touching this piece of equipment is going to get their share like the car. Now all of the sudden we have a locate problem. Wasn’t located right. So we call the locator out. He’s going to go re-clip on to the transformer. He’s going to get electrated. Pulled the… Electrocuted. (laughs) Pulled the elbow off. Stay awake. The switch gear is the big boxes. It’s a big box over open air conductors. Aluminum bars in there. So, same scenario. You’re playing on it. Betty’s jumping on it. Bends it in there, touches it. What happened to Betty? Nothing. As long as she stays on the box, she’s not the path to ground. But everybody touching it is going to get their share of electricity. Cool? Let’s talk about lightning. And I’ll go down my list. Any questions? Shannon? Lightning step potential. This thing is Called a Jacob’s Ladder. I call it the Frankenstein thing. Lost my other jumper. Right here. Okay, what’s going to happen is that I’m going to energize this. The 4 feet of dry air that I talked to you about before is going to insulate it. Once I start that arc Once I ionize the air, it’s going to become the conductor. The air is going to be conducting 14,400 Volts. It’s hard to break that arc. That’s why we have load break tools and stuff that you guys will be touching today. When we open an air break switch, we have our gloves on because if the wind blows the arcing into the pole It’s 14,400 Volts In the air. And then we’ll talk about lightning step potential. Okay? Let me start over. Energized. We’re going to start the arc. It’s hard to break. Very susceptible to wind. That’s where all your electrical fires come from with the trees, the arc. 14,400 Same heat, but it’s in the air. Bad connection in your house. Catches the wood on fire. Ionized air. Everybody cool with that? They quit talking. Okay. How’s lighting work? 5th grade. (inaudible from audience) That’s how you get hurt. How does it work? Alright, I’m on that. I did this at the Rocky Mountain school, and this kid was like, Giving me these formulas and stuff, and I’m like, Very good! Clouds bump together. The friction causes positive charges. So you’ve got clouds. Full of positive charges. Like I said, all electricity wants to do is get to ground, the same when you walk across the carpet. Build up a bunch of positive charges. The minute it can’t take it It goes to the negative in the ground. Strikes the crust. Ionizes the air. The air becomes the conductor. Cloud to cloud, same thing. Once that lightning hits, it dissipates that energy out in a circle. Just like when I throw a rock in a lake. That energy is dissipated out in rings. Same thing when lightning hits the ground. So Forget that. When our phase wire hits the ground for math’s sake, it’s 14,000. 13 12 11 You guys ever hear about lightning striking and 5-6 cows die? Those unfortunate cows are in the step potential. So, same as me, if I’m standing here. Little Rodney. If I’m in that step potential, I’m going to get 1000 volts up one leg and down the other. Very dangerous. Something we deal with every day. Same with the firemen coming to rescue Burnadette in her car. They step across those rings of energy dissipating and they could be hurting. Severely. Call the power company. Have the power shut off. Step potential. Questions? She’s got one! (audience) (inaudible) Yes. (audience) (inaudible) Uh-huh. (laughs) Correct. That’s That’s also induction. I’ll talk about that later. Let’s start with breakers! You guys ever be sitting at home? The lights blink once. They blink twice. They blink three times. The power goes out. That’s our breakers. Working to keep your power on. Working properly. Better get my gloves before I turn the power on. What happens is Lost Burnadette, too. Tree falls into a power line. Falls to the ground. That breaker just shut everybody off. All the way from here to Marble. Tree cleared itself. A temporary fault, we call that. Fell to the ground. Turns it back on. Everybody stays on. That’s what we want. Tree falls in the power line. Stays once. Stays two blinks in your house, it’s supposed to blow the fuse cutout. and Then 30, 40 homes, a whole subdivision goes out. Rodney, unfortunately, has to go out on double-time. Cut the tree off the line. Make a bunch of money. Tree stays in the main line. One. Two, three, four. It’s going to lock the circuit out. Until we find the tree. Same with another accident. Happens every day. Burnadette wants to cut a tree down in her back yard. She’s going to be holding the chain saw. Trees are very conductive. Okay. Let’s say Davey and I go out at night. We’re looking for this tree in the middle of pitch black. All of Frying Pan. How are we going to find it? Pretty soon we start flipping that switch. I’m like, “Can you see it?” Can you see it? We’re hoping you call in and go, “Holy crap! My house is on fire!” And then we know where the power outage is. And we’ve got all this technology – David – we’ve got amps. We’ve got fault indicators. We use all that. But sooner or later, you’ve got to flip the power on. Scenario is You’re watching the Bronco game. Your kid comes in. He pounds the nail in the wall. The room goes out. What are you going to do? You beat the kid. I always tell firemen, “Use your hose.” But then you’re going to go flip the breaker on. When the power goes out, you flip the breaker on. And that’s what we do, with 14,400 Volts. So, like I said, have your dispatch call our dispatch. 1. We’ll know where you’re at. 2. We won’t flip the power on you. We can lock and tag out people in Denver from turning the power on us. Please call. Breakers. Dispatch. Covered that. One shot. When we go and work on the power lines, us guys are up there in the bucket, we put it on One Shot. That way it’s only going to operate that breaker once. It’s for our own safety. Mike Dean says it best. 186,000 miles a second. I’m 6 feet tall. Breaker goes 1/60th of a second. Whoop-dee-doo! It’s to clear the circuit and not give you three shots. We’ve got breakers. We’ve got One Shot. We’ve got heat, oxygen, fuel. Volts and amps! Volts are pressure. Amps is amount. I got a 15 amp fuse in my car. You guys ever been jumping your car, you slam the hood, and it melts that One aught (1/0) cable? That’s 12 Volts. 15 amps. We’re talking 14,400 Volts pushing the same 15 amps. Amount and pressure. Two different things. It’s like water. If we turn on a hose and run it for miles and miles, it’s not going to come out the end. That’s why we have High-Voltage transmission lines feeding them. It’s because we have line loss and we can only put the house so far from the thing. Same as water. Make sense? Volts and amps. A pinhole in this glove will kill me. How come? You saw me here test my gloves. We’ll show you today how to do it. A pinhole will kill me. Same as my bare hand. 5th graders? No Okay The It’s said that the nucleus, if it’s a football stadium, an electron is a football a mile out. That’s the size difference. An atom is the smallest thing known to man. An electron is THE smallest thing known to man. Billions go through a pinhole. Kill me just the same. Very tiny. Very fast. Very helpful. Very deadly. Step Potential, we talked about. There’s 480 street lights, induction I’m going to show you the path of least resistance. I’m going to try. Lost my jumper. Lost my jumper. I’m going to answer a few more questions, I’ll be done. See what happens. Same scenario Burnadette is texting. Knocks the power line down on her car. Fireman comes to rescue, and he’s like, “What’s going on over there?” Well, this right now is taking the path to least resistance. But the minute he goes to rescue her… He’s going to become the path to least resistance. So, just because it’s not right there doesn’t mean it’s not going to become the… (path to ground) So, like I say with the 7 kids. One kid’s not going to take it all. That’d be like our biggest house taking all our power. The path of least resistance is real, but it’s… Everyone’s going to get their share. Induction! We’ve had a lot of accidents here at Holy Cross with induction. Underground cable can be induced. What’s happened here is I have a bare wire sitting on insulators. Nothing connected to it. No No jumper connected to it. Same as when we’re hot stringing. You know, we lay out the hot phases on the side and we pull the new ones in. Bare. No electricity connected to it. But the electrons traveling in this wire 186,000 miles a second They excite the electrons in this bare wire. That’s how a transformer works. Never touches each other. Induces. If I go up there Think this wire is dead. Right here is 14,400 to ground. Here’s the induction. Can you hear it? So, the other two wires have induced the bare wire. So that’s why we ground them. Not grounded, not dead, to protect ourselves from induction. Miles of this adds up to a lot. 480 Volts 480 Volts is all your large power. Any grocery store. Any ski area. This building’s 480. It’s very efficient. That’s why we use it. 480 Volts. If you grab it, it makes your muscles contract. You can’t get away from it. A very dangerous voltage. You ever hear about a coal miner, goes down into a mine, sizzled there all night? 480 Volts. We don’t direct meter it. We step it down. In the old days, the firemen used to pull the meter to get the power out of the house so they could start fighting the fire. I always tell them, “These tiny little wires ain’t feeding City Market.” So, they don’t do that any more, because of this reason, but. Just because you pull the meter doesn’t kill the house. Street lights! Street lights have transformers. that, uh The sun starts to go down, two lights to on. (vrrr) It’s going to feed those two lights. Sun goes down a little more, turns on 4 blocks. It’s going to pump more power to those four blocks. Once the lights – or blocks. Once the sun goes all the way down, it’s going to feed all the lights. So I could have tiny little wires sticking out of a street light. If I go grab them, it’s going to go “Holy crap, the whole town’s dark!” and it’s going to pump as much amperage and voltage as it needs to feed that little wire. People are hurt, real bad, with tiny little wires. Street lights: be careful. Did path of least resistance. Size doesn’t matter. Like I said. A kite string. Linemen have gone up, done their job, taken their gloves and sleeves off. Went to get a kite wire, been burnt. Size doesn’t matter. It’s going to burn that fuse until it’s gone. This is the smallest wire we have. Three of these in a three-phase power line could feed half of Carbondale, easy. So just think about that. All that heat. All those elevators. All those motors. Are in this tiny little wire. If that were a drive shaft on a truck, you wouldn’t touch it for nothing. That much power’s in this wire. One more, Mitch. (Iaughs) Skirts. You guys ever notice how transmission lines have great big bells? Then they get smaller, smaller, smaller. This right here is a termination in a switch gear. Or the epoxilators that you guys are going to be using. We have six skirts. 14,400 Volts Dead ground. That’s only about 9 inches. But the electrons have to travel over each and every skirt. To get there. That’s why the skirts get bigger the more electricity That – if I add that up, That’s 4 feet. That’s the smallest fiberglass stick we can touch it with. That’s why there are more skirts for more power. Questions? None? Thank you. (audience clapping)


15 Replies to “Electric Safety Presentation”

  1. DAN E says:

    i love the idea of setting up the lesson visualy with mini houses and utility transformers. very well done. but i was tought from mike holt and many other mechanics that electricity doesnt want to go to ground. electricity just wants to complete the circuit. electricity only goes to ground when yoy are standing on the ground and touching a live wire because the earth is connected to neutral and you will be completing the circuit

  2. electricianWisbech says:

    this answered a lot of electrical safety questions I had

  3. Robson Lucena says:

    Great Lectures and demonstrations. Thank you!

  4. Nothing says:

    You seem to have gotten a number of things wrong in this lecture. For one, your explanation of electricity just wanting to get to ground. Another being that conductors somehow have more electrons than protons, which would make them ions. And to say some have up to 400 times more electrons just makes absolutely no sense. I don't know where you got that figure from, but the most electrons in any atom known is 118. Now, electrons DO flow through metals, but that has more to do with the valence shells and how the atoms bond with one another.

  5. Blaise Nuthak says:

    wow well done brother!

  6. Robbie J says:

    I accidentally stepped in water barefooted while trying to plug in my usb charger to a 12v 18 watt modem and now the right side of my body is numb from my foot to my head i went to the hospital and did numerous test and a ekg and cat scan they said everything was good but i still feel the numbness in my foot and head will the pain go away or is it permanent damage.

  7. Dusten Huebner says:

    Great video! Thanks for sharing. Safety is so important in this field. Here's more on safety. http://www.electricianinformationresource.com/electrician-safety.html

  8. Cathie Jones says:

    This is a great presentation, lots of easy to understand explanations. The visuals just make it better. Well done!

  9. Mister Brookes says:

    Saying electricity is looking for the shortest path to ground is very wrong, it takes ALL available paths to ground when they are present. Laws governing parallel circuits still apply.

  10. Questões de eletricidade says:

    International Electricity Issues https://www.facebook.com/groups/612338922571375/

  11. Questões de eletricidade says:

    International Electricity Issues https://www.facebook.com/groups/612338922571375/

  12. Questões de eletricidade says:


  13. Cleyton lima says:


  14. Cleyton lima says:

    International Electricity Issues https://www.facebook.com/groups/612338922571375/

  15. TheZombiesAreComing says:

    Very nice demonstration, lots of useful information and actually showing what happens really helps the knowledge sink in more than simply telling. Something I'd really like to know is all the mechanics involved when a path is created from wall outlets to a body of water (such as the infamous hair drier and the bathtub)

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