MASTER ELECTRICIAN DAD TEACHES SON HOW TO TROUBLESHOOT A 480 VOLT PANEL!
Video by Hendy The Sparky
Hendy The Sparky
What happens here
This video demonstrates how to troubleshoot a "buzzing" 480-volt electrical panel, identify an overloaded circuit breaker, replace the circuit breaker, and address the underlying issue of inrush current. It also covers safety procedures for working with high-voltage panels.
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Transcript
(5,994 characters)Here it go. >> Yep. >> 256 amps on the 100 amp circuit breaker. >> Yep. >> How's that possible? >> Let's go. Let's start with this one. But always put a hand on the panel. Never let go of it. >> Let go. >> Never let go. And you have to always keep pressure on it cuz you don't know if these screws are any good or not. Just keep your hand on it. >> Yep. Keep your hand on it. Do the left side first and the right side or the Doesn't >> matter. Doesn't matter. Hold it. It's going to come right off. Now you want to take that and put it off to the side. Okay. >> And the same configuration, put your hand on it. Good. >> What we can do now is let's do an infrared scan with no load on that at all. So, this breaker could be defective. >> We always want to do an infrared scan. All right. Now, we want to take off the dead pump. We're going to see some hardware here. See that? There's a bracket here. >> There's a bracket here. >> Yep. >> And there's a bracket on the bottom and a bracket on the bottom. We want to remove these screws in that bracket. >> You're going to take off these two screws. You don't want to do that. You want to use this hand. >> Yes. Put that. Put your hand straight on this. Push pressure on it. Not too hard, but just so it doesn't fall. Now go. Good. Go. Now you want to switch hands. Yes. Yes. Let me help you. Let me help. Now this is going to come out and up. Now I want to make sure I don't trip any of these breakers off. So I want to make sure I pull it straight back and then out. Okay. So we're looking good. I want to do a visual inspection. Seems pretty good. My b my anode. Okay. That one here. Right there. >> Yeah. Okay. So, let's remove We're going to remove this breaker. Now, what we want to do is we want to make sure we label this brown, orange, yellow. Yep. So, >> yeah. Or what we can do for now is take one off, put it on the other one. Let's just do that. We're going to need a regular straight screwdriver. Flat. Yep. Wire. Wire. Type wire. Look like See, I can go one hand here on this. >> Yeah. >> This is live, right? Y. >> But I got one hand. Let me get a nut driver. It looks like this is a quarter inch. Okay. Okay, one at a time. Okay, so the bus looks good. So now I'm going to switch. I'm going to take that spare out one hand. Yep. Wow, these are very loose. That's probably why. Break time. See how this is this looks loose, but that's just the way it is. >> Yeah. >> So, these type of lugs are designed to make sure they're pushed all the way in and make a good connection. That's what we're going to do right now. Make sure I'm in all the way. I want you to look at this miss. Yeah. And tell me if you wanted to install more of these breakers, how could you do it on this bus? You need to order a strap kit. A strap kit is needed. A strap kit based on the size of the breaker. Like this is a 400 amp rated strap kit and these are rated for 100 amp each one. Okay. So, one strap kit will allow for two breakers. So, this is one strap kit for this one strap kit. One strap kit. One strap kit. One strap kit. Okay. And then obviously you have to shut this down. You have to mount. Okay. selftapping screws to mount the strap kit. >> Okay. >> All right. We're ready to go. Now, >> if you look, you can see these little teeth here. >> That's going to go right onto the back of the breaker. >> And you don't want to use a drill here. >> You want to use your hand. >> Yeah. Okay. So, I can feel it every thread going in. Yeah. Now, I'm not going to tighten it all the way. I'll leave it a little loose so I can get my other ones in. Okay. AC amps. Put my light on. Put my light on. >> Yep. AC amps min max. >> Mhm. >> And we're going to put it on and let's see what happens. 66. Watch what happens when it gets ready to start. >> 66 amps. >> No, it's 66 amps right now. >> Wow. >> Yeah. So, there's an issue with the load. >> Yeah. >> You see how much it surge is up to? more range right there. Here we go. So, what I've done, I've moved the decimal point over so we can see exactly what this thing is going to pull. 256 amps. 256 amps it pulled. >> Mhm. >> Ow. Oh, wait. It's a >> 256 amps on the 100 amp circuit breaker. >> Yep. >> How's that possible? >> Inrush current. That's way too high. That's what the problem is. Oh, how the >> How come the breaker didn't trip though? >> Because it's not enough to trip the circuit breaker. It's a It's a quick inrush. >> Okay. >> See what it's where it's running at 32 m. Yeah. So, that's what it is. So, let's put this other breaker back in. Close it up and let him know that he's got an issue on the roof. >> Yep. Let's close her up. It's the load, not the breaker. Right. >> Right. It's the load, not the breaker. >> Mhm. So, if you look, see this little spot right here? This is the bracket. You see the bracket? See that? >> That fits into these little slots here. See them? There's three slots. >> Explain to viewers what you're uh putting in. How do you put this circuit breaker in? >> So, there's a Z bracket here. Yeah. >> And I want to make sure that aligns to these little indents in the breaker. >> Yeah. >> So, I'm going to align that in. >> And then I'm going to align it into the bus. like that. >> Okay. >> Okay. And now I'm going to take my screws. >> Yeah, I see the bracket. >> Nut driver. >> Nut driver here. >> Now we're going to put in the bottom. Sometimes there's a little part that goes at the bottom. But now we want to line it up to the breakers. Okay. You don't want to use a nut drill, right? Drill. You can use a drill right now if you don't have it. I have three of
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