THE DINING ROOM AC JUST SHUT OFF 

I had to do a LOTO "check-out" at work, and when I went to turn the power back on (it was a simulated panel, no HV), without thinking I said "1, 2, 3... please don't blow up..." look on my boss & safety guy's faces....😮

That's when you don't pray, "1 2 3, please don't blow up."

2:25 This is the LockPickingLawyer and today I have a perfect example of manglements idiocy.

That J-box identified as a fireworks stand....and let ALL the smoke out

Cya rewire the whole thing dont trust those wires. I agree a home run durect to the unit is best

Congrats for going above & beyond by cleaning up the other contractors mess ❤

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Bet that made noise

Two videos that required sparkies in a row. I'm glad to have them in the facility I'm working in now.

That was funny when he showed the mess in the video and said no comment classic electricians leaving a mess at least they cleaned up all the wire

That was some Kentucky fried wire. Extra crispy recipe.

1:32 - What happened here? I'd say angry pixies went BRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR, and that hole in the side of the box was them overflowing out and spilling onto the roof

I have the same Fieldpiece clamp meter and rotation check function works great, no need to bump a contractor to see if a fan or pump goes the right way.

Hey, I'm not a HVACR tech, but I'm very interested in your doing. Your mindset and your "Big Picture " thinking, helping me chance my mindset, as an service tech for tube bending machines, to become a better service tech. Thanks for all your inspiration.

To open a Masterlock you just need to use another Masterlock... 2:26

WHY on earth didn’t they just pull the extra eight feet of wire to not need those joints? and why a red wire for ground (not legal)? can’t believe they left that switchboard open and left for lunch…

Don’t know if you’ll answer this question or not, having an issue with the AC in my workplace, it’ll be nice and chilly in the morning, but as the day goes on it comes out the vent at 85+F but if you take thermostat off wall for a few minutes and put it back on vent temp goes back down to 50-60s. The fan stays on the whole time but compressor does not.

Great extra argument for your general "stop and observe" approach to trouble calls. Not everything that's let the smoke out is dead.

If there is one thing I know about electricians, it is that they do not clean. The justification I usually hear is that their hour is more expensive than to get the cleaners to do it. How true that is, I don't know

Good call not trying to salvage that existing wire, that stuff was charred to a crisp.

Well if it's before the load side of the disconnect, it's time to call Sparky.

Muy buenísimo trabajo mi estimado Chris, así es como resuelves los problemas y además das mucho más de ti, no importa quien haga el desorden lo importante es tener la satisfacción al dejar siempre limpio la zona donde trabajamos. Gracias por siempre dar consejos de como hacer nuestro trabajo. Saludos desde Coacalco Edo de México.

zappy zap zap, that would have been one heck of a fireworks and lightning show. 🤣

Why in goodness name did they pull new wire from the j box to the unit and re splice the wire?!?!? Why would you not take that opportunity to eliminate the j box and splice or even leave the j box but at least eliminate the splice…

Wow, 2 consecutive videos where the wire goes see ya and a new feed needs to be pulled. Great video as always!

I have seen something like that. Pull disconnect on the side of a federal building and the fire that had ensued inside the box had melted the insulation back to the wall. Our company sub-contracts stuff like that out. Lots of pictures and estimation of about 200 Ft of 10=2 wire to main panel. There was going to be some drywall work involved if it was done as a new pull since the old run was Romex. I know the feeling of On-call, have it this weekend and Saturday night got called out for a noise complaint at a high-end condo where big money is spent for people to be able to take over 4 Units to make one unit on the lake. 4 Floors and all. Noise was heard in multiple units in a unit stack. Boss said to find the culprit. Well I did with on call time and will let him deal with the logistics of billing that but found out there is a central booster fan for all the vents to go into and the fan itself had bearings going out. 3 Hours total in this whole mess.

The pull likely caused some of the damage, particularly since the wire was old and the insulation would have likely become brittle over time. But it's also plenty likely that there was water in the old conduit and that contributed too. That wire was definitely jacked up when it came out. The insulation shouldn't have gotten messed up on the new wire, partly just because it's new insulation and not old and brittle. They also generally use a lubricant to help the wire slide through the conduit, at least if it's tight.

The last two vids have been absolute humdingers!

One time my good friend opens the box and there was a large rattle snake wrapped around the bus bars LOL! Crispy obv

I appreciate that you explain everything in each video so the viewer can join your channel at any time and learn something. Thanks

Best you made was telling the customer to go get an Electrician. I wouldn´t even have cogitated stripping something like that 4in clean, you´ve shown how the wires were cooked throughout the whole lenght, condensation could come back bite you in some time and might even short it worse inside the roof where a fire could take place.

I love how the original electricians left a loop of plenty of extra cable in the unit going to the disconnect, but the new guys cut the replacement run to size 🤦‍♂

Look at all that charred wire, its a miracle the building didnt catch fire

Perfect time to check voltage at the fused disconnect, even know it’s turned off. Also while working on that circuit pull the fuses out, just in case someone doesn’t walk by and flip breakers cause their oven or outlets not working 👍

Some pedantic nitpick: It's a SwitchBOARD if it's 600V or lower (line to line or line to ground). It's SwitchGEAR above that (i.e., 3kV, 12kV, and above). The Transformer that bridges the two is technically part of both.

That has to be the worst electrical failure I’ve seen on your channel so far. Thanks for the awesome video Chris! 👍🏻

Dang! Those wasps were way more docile than usual! Glad you didn’t get stung

Contractor Clean-up is a Make or Break thing. If they Leave a Mess on the Ground, I can only Imagine how rest of the job was Done. Clean Up your Mess or Else. 🤪👎

250.119 violation 250.119 Identification of Equipment Grounding Conductors. Unless required elsewhere in this Code, equipment grounding conductors shall be permitted to be bare, covered, or insulated. Individually covered or insulated equipment grounding conductors shall have a continuous outer finish that is either green or green with one or more yellow stripes except as permitted in this section. Conductors with insulation or individual covering that is green, green with one or more yellow stripes, or otherwise identified as permitted by this section shall not be used for ungrounded or grounded circuit conductors.

As I have mentioned before, and will do it again. America electrics looks like stoneage stuff comparing to european standard. There's no way we are allowed to install metal cases for electric breakers or couplings. Everything is uv-resistance plastics today to minimize electric chocks if a wire gets damaged/loose and shortcuts to the casing.

Dude I was laughing so hard when I saw the trash the electricians left, I always take a pic of shit like that, it not only irks me but sets my OCD into Bull shit mode. lol and when you said "No comment," I said that's not what you are thinking. PS: I always clean up what I can, but get so tired of cleaning up other people's trash and just think it is BS! lol

I have seen and had a lot of Polaris connectors fail. I personally dont use them anymore. Just went back to using copper split bolts.

I can’t believe that American sparkys can get away with 4 wires all the same colour to termination points ! R-Y-B & Green…not difficult….

Also, modern THHN has a nylon jacket on it that is not part of the insulation rating. It provides some gasoline resistance but is otherwise sacrificial for during the pull - and it can make the wire look "fucked up" but doesnt affect the insulation. They probably didnt use enough lubricant either time

7:15 is me every time I’ve opened up a Trane condenser panel this season and seen 10 wasps fly out at once. Gave quite a few home owners a good chuckle

My guess would be a loose connection melted the connector or softened the insulation on A phase, which then shorted to the grounded lid for a while, heating up the fuse along with blowing bits of the faceplate all over the place, then it blew, and the unit shut down because of losing a phase (I know that last bit you already told us). I'm amazed with all the heat and plasma flying around that the other 2 phases were still live. And as for those electricians leaving the panel door open and going for lunch, man I hope their public liability is good, can you imagine if a kid had wandered in?

In Germany we have to choose the Fuse based off the Cable we use, if we deliver 400VAC with a 5x cable, we HAVE TO take a Fuse with 3 coupled Fuses. So in the event of failure, or just for turning off, ALL Live wires have to get turned off! Based off these Arcs, i would just guess either the Fuse failed and didnt turn off (which is not possible in Germany Fuses, as they would internally fail and disconnect the circuit (all 3 Phases) or the Screwnuts were either lose or overtightened. When you screw them too much into the Wire it could help the wire to break and while it breaks/fails, it can happen that it will arc really badly, based on the load aswell, the more load, the greater the arcs

The electricians said the old wire was damaged from the pull, I hope they at least used cable lube for the new wire. I've used it before in a conduit run with one or two too many bends and it helped tremendously.

Glad no one was near that electrical meet-point box on the roof when the wires burned.

Call the electrician, holy crap

I'd remove jbox and do a temp connection if after hours or weekend till electrician showed up. Never had service electrician ever show up that quick. I'd also help him pull if he's cool.

My ice merchandiser was not cooling. So I add R134-A. I keep adding Freon but suction pressure goes up and then come back on 0 psi pressure. I leave it on for one day. Inside the freezer ice bulid up on two side but not reaching 20 Fahrenheit temperature. Right now is doing 26 Fahrenheit it’s ON almost 24 hours. Thanks in advance

Crazy. Had a convince store that couldn’t find a key so I could get behind the building to work on a walk in cooler. Told them they better get a new lock. 😉

Hey, 4th of July on the roof ! Maybe a bad Polaris installation? Those things were jamed in there from the beginning. Water would have drained on down.

good job Chris something definitely shorted to ground keep up the good work

Safety question, why not shut the main breaker prior to opening the box? What could have been found that could have been fixed with the breaker on? Trash - "We are what we repeatedly do. Excellence, then, is not an act, but a habit"

You are probably absolutely right good job

I drink cold coffee and watch ur vids every day

I see that a lot with electricians. We had our telephone pole get hit with lightning, and the power co came out to fix it and left the garbage in the woods behind my house.

Holy crap, inside that box was black like tar, plus its crispy like fries definety had an electric fire! Im surprised the whole box didnt melt! Is it plastic or metal? Nice job chris!

Man... Glad you were able to get it going again, but as someone in the electrical industry... Those guys were hacks. Pulling red wires for everything, plastic junction box on a rooftop, leaving a mess behind. I'm not sure why they choose to put a splice back there again instead of just using that box as a pull box and keeping the conductors continuous all the way to the unit.

I think it’s an international thing with electricians not tidying up! Ask any trade in the UK who’s the messiest…….

Ive had a 3phase 20HP water pump melt through a wire nut (yeah a wire nut, not a marine grade lug block, smh) and short on the case, never blew a fuse or tripped anything

Chris you’re like me, I’m like red for ground huh? Ok… my friend is an electrician he always says the wire doesn’t know what color it is, I always say yeah now I don’t either 😂

You gotta love the yellow jackets!

Hmm who does not love Crunchy Cables! Nice :D

Great job Chris has always.

Great video. Thank you for sharing

is that unit on the Los angles power grid? the unit might need a . ICM Controls ICM450 3-Phase Monitor . the same thing might happen again because of the power grid dropping out or spiking. power grid voltage starts dropping down motor amps go up .

The hole blown in the electrical box was caused by a bad connection in the electric box; somebody made a poor connection, over time (cycles of the A/C turning off and back on) wore away at the already bad connection. I wonder how the roofers installed a TPO membrane around the electric penetration? A guess is the roofers made the install easier for themselves by disconnecting the wires when they put the new roof on. The roofers did a poor job reconnecting the wires (obviously) - they'll never admit this. Water isn't involved here, these are poor mechanical connections, those bad connections break with dramatic results. Electricians leaving garbage behind? It greatly irritates me; it seem to be an electrician's tradition

That junction box looks like it had a fire in it at one point. And when they pulled out the wire, I'm surprised it didn't cause an electrical fire. That could have easily resulted in a fire and caused extensive damage to the restaurant. So I'm sure the customer is grateful that didn't happen.

I hate to see the bill on an emergency service call like that where you have to rewire a whole thing.

"I do the recordings for my employees". Geez it's been at least two years and I haven't seen a paycheck! 😂 In all seriousness, I know it's the ultimate defuse statement for someone who's just looking to get defensive or angry about being around a camera.

I have nothing to do with your field of activities but I hope I come across a non-functioning AC at one time in my life and do what I learned :p :D

Talk about angry pixies! 😳

I thought it was just an East coast thing, but electricians are afraid of brooms.

That box went nuclear!

Electricians and Baseball players, both Prima Donna's!😁😎

When you showed the new box the electrician put in, I noticed the Cantex logo on the cover was upside-down, and now I’m wondering, did you see it and put it upright before you left?

I would say that one of the lugs must've came loose and heated up and blew the hole in the box. IMO. We'll al least the Sparky came out quickly to get that up n running. Could've,Should've, maybe checked amps on the Cans each? Don't know just saying to put on your exempt list. Great video Chris keep up the great work bud.

Love the videos and 4K 60 now idk if your phone supports HDR BUT IT WOULD BE AMAZING to have HDR

They need a proper disconnect on the roof for each A/C just I m case of an emergency

You missed a perfect "When theres your problem lady" chance.

Lazy electricians right there. Who doesnt have a spool of 10 green?

Is there no code over there to differentiate the different phases wiring? Here pulling a red wire for ground with taped color yould be a big no no.

Locking the breaker panel.... Like that's just very stupid and bad from a safety standpoint.

WOWIE !😮

(Adam Savage voice) "Well there's your problem." That box is extra crispy if it burned the roof too. I guess they didn't ask your 2c if they left the box there. Someone couldn't be bothered to do full runs when the unit was originally installed?

8:05 oh dear, that definitely doesn’t sound right. A compressor running backwards? I have seen it before and I know that compressors don’t like it when they run backwards. - Riley (use my name because this is a reminder)

Staying in your lane reduces liability. What if the underground run is jacked and it starts a fire

Hope the electricians aren’t the same as before!

Electrician crumbs!!!

electricians are allergic to brooms! Also, why keep that stupid box? Makes no sense what they did.

Nasty short circuit

Wow that is crazy.

Chris you should make shirts thst say "1,2,3 Please don't blow up" 😁

why on earth do you guys have electrical entry points on top of the box where water can get in ?

They are lucky that this didn't start a fire. Bro these American electrics are such a joke compared to what we do here. No code here allows a metal junction box just sticking out of the roof with just loose connectors in them. Needs to be in a securely mounted IP rated enclosure that's protected from the sun and rain fitted with DIN Rail mounted connector blocks. In new builds you barely have any roof penetrations at all, we have a room on the roof that houses the sub panels and control cabinets for the ventilation system and AC systems with a cable vault from the lowest level of the building to the rooftop. The cables are ran across the roof in sheetmetal chases. That's pretty much how all new builds are laid out. Cable vaults from all the way up and down and rooms connected to that housing all panels and control systems.

3:45 throw those connectors away, I've had issues with them on tower fan motors, they melt, they're junk!!

Why would they use connectors again. Did not want to pull that extra 6ft of wire.