Deadly 3 Phase Short - The Worst Day Of My Career
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- เผยแพร่เมื่อ 23 พ.ย. 2024
- Well well well. Here we are, a big ol winter blow up n blow out. I almost didn't release this video, as you can tell, it might not flow like I try to make it usually flow, that's because I had almost fully pooped my pants, so I kinda forgot about the video. But then I remembered, this channel is about transparency, and REAL WORLD sparky work, and in the real world, people make mistakes. This is one of mine.
In todays episode, I was working on a 3 phase UPS system, I completed all of my work to an exact job spec, the actual UPS installation was carried out by another contractor, however we hadn't realised, they had set it up for single phase by mistake. When I tested my install, I tested up to the isolator, and not the system I was powering up. What was the worst day of your career? Comment below! 😵💫
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/ @corymac - วิทยาศาสตร์และเทคโนโลยี
Any sparky thats been in the industry a while has had a day like this. Massive respect for posting this and huge respect for how you dealt with it. Always love your videos. Glad you’re ok too Cory.
Thanks mate
Fairplay for putting this out there. It's a hard watch towards the end, anybody who's been in a similar position knows the feeling.
Still stressful for me to watch back now!
@@impactvision agree, not a nice situation. . It’s when experience and training kicks in.
Step back, compose, kick in any rollback if available (should be part of your ‘what if’), follow the same process because you know what you’re doing and you’ve followed it. Re assess, and remind yourself, rushing to fix will end badly!
@@corymac You've still got to remember that you made the same mistake twice, but got lucky this time.
It’s finally up! Glad you put this out bro.
Real world sparking, you owned it and we can all learn something from this, well done 👊🏼
Respect for posting this. Owning your fuck ups and fixing them is proper integrity, and pretty rare in the modern world.
First, I'm glad you're OK! Secondly, there is an extremely valuable lesson here. I'm glad you decided to post this video, that speaks to your integrity more than any perfect job ever could.
Another consideration with jobs like this: when working in server rooms / data centres, ALWAYS set the fire suppression system to override on entry! The last thing you would want in that situation is the room filling with FM-200.
That was part of the risk assessment 🤓
@ 👌 good work.
We replaced our main UPS system for our data center a few years ago (regional water company). The job was coordinated by our (useless) facilities manager. We all turned up on the Sunday to do the work: UPS supplier, electrical team, facilities team, telemetry team, , generator team, and 1 person from IT. We said “you sure 1 person is enough?” “Oh, yeah, I mean we’re only here just Incase anything needs restarting”
🤔🤔🤔
“You know we’re turning ALL the servers off?”
The facilities manager hadn’t told IT that the servers would get powered off entirely to do the work 🙈🙈 she had just said that “they’re doing something with the UPS, but the power will stay on”
That's why they have holdover switches. Might only be a thing in real DCs all the backup power, fire, security, etc.. is handled by the DC operator and not the client.
@@Pugjaminstrange risk assessment work.. All modern IT equipment has 2 PSU's. When working on a UPS, or power, you always see to it that one leg has backuppower.
Was the floormanager sleeping during all meetings😂
Ow, and do not eat in the rooms, and DO use a vacuum cleaner when drilling😅
Wow! Fair play for still putting this out! How you stayed Zen throughout is impressive! These manufacturers should install a security tag warning label on the UPS warning of the phase link! Ive seen this before on a pump for a steam room but luckily they just supplied the link in the kit rather than installing it at production.
Thanks mate
Pausing the video at 9:20 to post this - as someone who is not an electrician but an old-school sysadmin who has worked in his fair share of datacentres (the biggest of which being where iPlayer is streamed from) - that socket placement is ... questionable.
All of the power outlets I've ever seen in DCs are attached to the ceiling above the rack itself, or at worst on the wall adjacent to the rack, with the UPS power being fed under the floor and into the recepticle from below. Not saying that attaching it to the floor tile is "wrong" per se, but it's absolutely not like anything I've ever seen.
Was scrolling through the comments to see if anyone had pointed that out. In all of our facilities, the power and network are always coming from above to reduce risk of damage by someone moving a rack around - your staff might know about the ground-mounted outlet(s), but random IT consultant/hardware deployment team from a vendor might not and could break it off moving the outlet if they are careless.
I had the same comment.
But first of all, kudos to Cory!
I managed a few small DC's, and the worst thing are permanently mounted items in racks. There will be s time a rack is swapped or moved. What you then don't want is a socket under our a switch inside.
We never had rails or sockets above the racks, but CEEform sockets on the floor, directly under the racks.
All PDU or UPS cables are fed through a hole in the tile, i.e. big enough for the plug.
But as Craig said, if there is a ladder/duct above the rack, that's also okay.
@corymac I can advise you to at least try to advise the customer to let you do it like that.
(And put the switch on the wall, not in or under the rack and mount a 32A 5pole CEEform outlet on the floor, below the tile)
As an aside, the most interesting UPS I came across was a diesel rotary UPS (DRUPS) which is essentially a really large drum of concrete on a spindle being spun by a large motor. Connected to the spindle is an alternator which generates the power for the load side. The spindle is large enough so that if the input power is stopped there is enough inertia to keep the spindle rotating for several minutes - which allows the backup generators time to start in order to feed the motors. The output power is perfectly clean waveform.
Yeeeeeouch Cory! I had an inkling where this was going. Now you know that these UPS can be three or single phase. Some also have an additional single phase bypass / fall-back input too. How to liquefy your lunch in an instant. Well done putting this video out. Cheers
Ah Jim, experience is the mother of all teachers. Worse part is, as it was all pre connected up, the only part exposed was the 3 phase terminals, with no linking bar in sight! Made for what I thought was a nice easy connection 🤣😅
@corymac Yes indeed! I wondered as much, after I left the comment. Some years ago I scored a good sized UPS from an auction site. There was no interest otherwise as it was advertised as three phase. It had a linking bar installed. I'll send you some more Tim Tams in the new year. The Christmas shipping price hikes are upon us. Cheers
You can get Tim tams in Tesco now so I no longer need get them sent over from family in nz 🎉
@@reubenbacon9156 and they're often cheaper than they are in Countdown or New World which is wild!
@reubenbacon9156 oh wow, Cory can buy his own. Hehehehe. Cheers!
The UPS here is an "online" UPS which means that it is transforming the power going through it - you can tell as it was adjusting the voltage from the line voltage (240v) to the output voltage (230v). It doesn't just "switch" from line to battery quickly, it actually is the source of power for the equipment and gets it's power from either the input or the battery. The output waveform won't be same as input and potentially might have different frequency (if that was a requirement) and will typically be a clean sine wave (in a good quality system anyway). The input form might be somewhat noisy depending on what other loads are present or might suffer from spikes or drop outs.
Very rare I comment on, well anything but fair play Corey. Only the greats show the rough with the smooth and let others learn from the bad times especially in a raw format like that. You could have easily made this video in massively edited way with the sun shining from your arse and cut out the 2 fireworks etc but you kept it honest. Fair play good sir, keep up the great work
Much appreciated that people see it that way, as it’s intended. Thanks, Daniel
Yikes! Stressful situation. You handled it like a champ, no panic, do your procedures and be sure. You say it might be the worst day but looking at how you handled it this could be one of your best days. You took a bad situation and showed you are safe, responsible and good at what you do. If anything thats a great endorsement. You thank the customer, who could have been bad about it fair, but they trusted you because you did your due diligence.
No wonder you're smashing working for yourself, with a working attitude like that and the ability to stay calm when shit hits the fan... Massive respect for posting this and letting others learn from your experience
I see so much of these nice perfect world videos, you my sir just showed the real world problems, and what really happens, we are all learning and growing, keep it up, I never put comments on, but this video deserves it.
As an IT guy, this is relatable (though not as directly potentially deadly in my field).
Mastering a craft is about understanding it to an extent one can correctly analyze situations, make plans, and predict the outcomes of each plan, setting the optimal one into action. However, mastering presents some major trapfalls as well.
You made some assumptions based on a lot of previous experience. But, a single (and somewhat hidden) variable, differed from most/all of your previous experience. I'm not sure if the bridging was documented, so you could have caught it by reading the documentation in advance, but if there had been a sticker saying "phases are bridged" on the connector/wire from the UPS, you would surely have noticed. And this is another trap. If you had set up the UPS, I suspect you would have added that sticker saying the phases were bridged, so you expected the same level of detail from other professionals, and this is most often correct, but not always. This is why standards and procedures are so important. Lastly, there is an expectation of working fast (this can be internal pressure made by yourself or based on the situation), and by leveraging your experience and predictive ability, you can work faster, but at the risk of the 100th job differing enough from the first 99 to make the difference. Thank you for sharing. This is something we all have to take into account in our professions.
Wow, that can’t have been a good experience; was helpful too see it happen and that you still felt comfortable sharing ❤
It’s important people see, that everyone makes mistakes
I actually had a faulty isolator once, also on a UPS.
Also a data center got a new 3 phase UPS, and we installed the new feed. In OFF position everything was fine, we checked input and output, evrything was good. But while turning it to the ON position I could feel something inside of it breaking and it was already to late. Two phases shorted out, 80A circuit full short. The explosion ripped the whole isolator off the wall, only the screw posts had been left.
The short was so heavy it not only took out the 80A NH00, it blew two of the 160A NH1 fuses in front of the panel. Luckily we had our torches with us, cause it was in the middle of the night. We quickly checked the other running UPS uptime and decided to run the panel on the backup generator until one of us took the long way back to the shop to get new NH1 fuses. Took about three hour, but the job was messed up anyway cause we only had this one now broken isolator and it was a friday night, so no way to get another one before monday.
Well done Cory, great honest video content. Glad you got it sorted and no one got hurt ❤️👍
Us too! Thanks a lot 🙏🏼🙏🏼
Thank you for still putting this one out, a credit to you for trying to stay calm and following procedures even though you will have truck load of adrenaline dumped into your body.
Last thing I would have wanted was to be talking to a camera in those situations. 👏👍💪
Thanks for your honesty and airing this video.
Your security escort Paul, is also a TH-camr. #Cars For Paul
Thanks mate! He is indeed 😁
Damn. Awesome that you released this, thankfully no one got hurt and you weren’t hurt. Following safety procedures and taking it step by step got you through it in the end. Thanks for sharing, as always very educational!
I hope you have a very good and nice string of jobs to compensate the scare you had there
Fair play to you Cory. I know a lot of sparkies this has happened to. I have installed quite a few UPS systems in my time on the tools. Luckily the IT team were on hand when I worked night shifts. They communicated the fact that there was a bypass link between single and three phase. They had learned in the past and the bang was immense, luckily the client was understanding about it. Goes to prove testing of the cables is key.
the knobs on the mccb set the trip temperature (thermal trip) and trip current (magnetic trip)
Electrical content creators need to show these types of videos. It can and will go wrong at times and the important thing is how you deal with it. No one is 100% perfect 100% of the time. "A man who never made a mistake never made anything".
I had a situation once that always makes me test for dead now no matter what... Im a lift engineer by trade and was changing some socket fronts in a friend's house... Isolated tested changed socket fronts in 2 bedrooms... Went to the other side of the house and was just muttering to myself as I was pulling the next one off I said to myself "you should just always test cause it takes 2 seconds and you just never know" and guess what... It was live😄 and not only was it live I found that some cowboy had wired 3 sockets in a room above a kitchen from the supply side of a cooker isolator
Nice one for putting this out, the days at work we’d rather forget. Thanks to this video I’m now gonna be checking for continuity between phases for on any bits of 3 phase kit i didn’t have anything to do with putting in as I’d have done exactly what you did and got the same result
These UPS systems are generally designed to be installed by specialist technicians from the manufacturer. I don’t know if they came in first but the policy is generally that they are present when the mains connection is made or the main connection is never energised it is okay simply because there are lots of software things that can create this issue too
Wow, great video Corey, shows what a top man you are in a majorly stressful situation. Well done!
Edit ‘Cory’ apologies!
Handled the situation in a perfect way mate…system up and running and more important than anything else no one was harmed 🙏🏼
Top Man Cory.
Similar to most comments, it’s the way you handle these situations that make you worth every penny, especially, when you 100% know you have followed the rules, more so the risk assessment process - its there for you, as well as everyone else - not just a ‘tick box’ exercise!
The ‘what if’s’ should also be part of the fabric of this work, especially when you are the only one on the job.
Boy, are you a stronger, more resilient person as a result of this situation. Hat off to you sir.
Thanks, David. Much appreciate the kind words
Excellent video. My heart-rate always goes up when working on data racks. The stakes are definitely higher. So happy the UPS took both hits like a champ and kept running.
Ant+Dec scene had me cracking up. Made that mistake myself, anything bigger than 10mm now gets the big spacious isolator 🤣
The manufacturers are jokers 😩
27:46 I’m glad no one was hurt. That’s the main thing. Remember we all as humans learn from mistakes not when things go well.
Next time you’ll and any one who’s seen this video will check if all phases are linked.
Great video!
Well done for releasing this event. I have great sympathy for the horrible situation you found yourself in as something similar once befell me. Your ability to overcome the situation is a great credit to you.
Thanks bro 👊
It doesn't matter what industry you're in you always have a bad day. The company I own we specialize in water irrigation systems and I put a trencher through an armed cable and the trencher lit up like a Christmas tree. As long as everyone walks away and you learn from your mistakes simple as.
My mistake was listening to the previous tradesmen that had been there saying there was no cables in the ground All I had to do is grab the cat scanner scan for 10 minutes and I wouldn't have nearly killed myself.
Standard with UPS is no neutral blue wire, it's phased like a IT powergrid (Norwegian powergrid standard)
Good on you for showing this video. Hopefully, it will help to show others how things can go wrong, in spite of how hard you have worked to prevent them happening. I thought you did great at staying calm under pressure. I don’t think I would have been able to keep my head in that situation.
👏👏👏👏 I applaud you Cory for posting this. I can see by how you handled this that your attitude is SO personal. _but I can imagine your stress with all this, so many factors. Been there, done that mate. It's all good..._
I appreciate that! Thanks for the support Mark, as always! 😎👊
What I've found is that to avoid this kind of thing you really have to have the UPS manufacturer and the installer on-site when you wire this kind of thing in. I'm a sysadmin and we had to have an UPS wired in and the electrical contractor came in and while wiring the UPS in broke it. So we had to get a replacement which took weeks. Fortunately, nothing bad happened. I'm glad that you were not injured or killed. That's a hell of a scary thing even to witness.
Well done, I admire your coolness under extreme pressure.
I’ve had the old “3 phase banger shakes” you are right you need to snap straight back in to it and get your head straight, fair play Cory 💪🏻👏🏻
Great content, massively respect the transparency!
It’s not the fuck ups we make,it’s how we overcome them, everyday is a school day!
The ability to own a situation and not panic and to learn from it is such a valuable asset in the electrical industry 🙂
Cory the important thing is we loved watching you blow up this main frame and thank you for putting content that isnt endless solar wank
🤣🤣🤣🧨 you’re welcome
Solar content is good in moderation, lol.
Well there is ev charger wank too ;)
Big respect for putting this out, happens to us all at some point , anyone that says otherwise is probably lying.
Worst day of my career (at least that involved smoke).
I was fixing a machine in Venezuela (getting there was a palaver in its own right involving an armoured car that didn't turn up and then got lost) used for printing money.
Right in the middle of their hyper inflation and riots due to there not being any cash.
The machine fault had been remotely diagnosed incorrectly and as a result I didn't have the parts needed to fully get the machine going, but I did have enough to get it running at half speed. The parts that were sent were old stock, and the same batch that had already failed in the machine and others. I knew this before fitting them but didn't really have much choice. I had what felt like the entire maintenance department watching me work so they could learn a bit about what made the machine tick. Every time I wanted to grab a screwdriver I had to fight my way through a crowd.
After testing absolutely every potential part of the machine I pop the new (old) parts in, fight my way round to the front and with some trepidation pushed the power button.
The machine dutifully goes pop, the magic smoke is released, one guy from the audience quips "is it supposed to smell like barbecue" and they all walk off. Leaving me alone with a broken machine, no parts to fix it and my phone locked in a security locker. I just wanted to melt in to the floor.
as a UPS installer this was great fun to see
I knew where this was headed, I have a 10KVA UPS in my home rack that has both a 32A three phase input, a 63A single phase (using a phase link bar / wire on the inout terminals), and a single phase bypass input. Installation of this I opted to read the manual 😂 but as I should - I supplied and installed my own UPS so its all on me to commission safely… Good job putting this out there, its a reminder that not everything goes to plan!
Good watch as always Cory. If there's one thing i've learnt working with clients over the years it's trust but verify and do your best to understand the existing setup. Very lucky to have not had any equipment die from that!
The smart man learns from his mistakes. The wise man learns from the mistakes of others.
Glad you opted to put the video up for the benefit of others.
Props to you mate.
Edit: In answer to your question at 4:45 "Allahu Akbar" has to be Number 1.
👀
Good on you Cory for putting that out there,many electricians will have watched this and it may just trigger another check before Switch on . When you are on a switch over like that no one is going to start opening up other contractor work. Should have had big notice on it ( Remove internal links when connecting 3 phase supply)
We all have had bad days like this. This is where reading the paperwork to the ups and other kit is vital.
Keep calm and carry on 👍
As ever thanks for sharing must of been a difficult decision to make , really love your varied content but out of this episode the most important thing is you are ok 🤔😎❤️
Thanks a ton mate!
Great video mate! So safety procedures can not only save lifes, they also saved your reputation here.
Great video as always, Cory
Need to mention that at 14:02 your customer's name is visible on your badge
Respect for posting the video, everything is always a lesson! Aside, no food or drink on the data floor! If you spill that it will leak down through the suspended floor onto the cables underneath..
We've all been there mate. The manufacturers should have fitted a massive warning label on the unit. A similar job that I did years ago turned out to be two DIN rail terminals fitted with the open sides together causing a short across 2 phases.
Wow, thanks for such an honest video, very easy trap to fall into, especially when someone has made it for you, that must have been loud when that let go with 400v and a 50a supply, keep up the good work, totally enjoy your videos
Thanks for watching and commenting mate 🙏🏼
Wow! That was exciting Cory, choice of music was cinematic!
Well done for putting this out for young sparkies and future clients alike. The way you dealt with what must have been a flippin scary experience was seriously impressive. Worst day, learned a lot, is a good day, awe inspiring how calm you kept, well done, I'd employ you with confidence any day of the week. Great job and really not your fault at all unless second sight is a qualification I didnt know is on the electrical curriculum!👍
Stupid as hell that there isnt a warning label on the 9k UPS to check the bar for single or three phase purposes, but there are labels on 400 euro induction hobs..
Handy that you had spare isolators on the van. I once put an angle grinder through the DNO supply cable, cost me 700 in fines!
Oh man! That’s sounds bad 🤯. Must have been a loud bang!
datacentre nerd here - generally I see all commandos and isolators under the floor or on the wall - i personally don’t think that electrical kit should be in the rack at all
I was thinking same thing - we always had ours on the floor so that racks could move without necessitating rewire from the board. We also had our UPS separate from the racks - it fed the board and was in a different room.
We do the same, all power outside the rack - above or below. Just in case a rack needs moving.
Still a massive kudos to Cory on how it was handled.
Funny that I watch Paul’s TH-cam channel too 😂massive respect for posting this we’ve all them days mate had similar with a brand new £500k oven . Atleast your ok and dealt with it well
Explosions?!
The secret to electricity is to keep the smoke inside the wires, because once it's escaped...
Hope things are fixed in the end 🙏
Biggest bang I have come across was a solis 100Kw PV inverter that decided to set on fire and ended up taking out a 1000A MCCB.
Hard day at the office well done great video I think a lot of people will learn a lot from this video again well done.
My apple turnover was prepared in time for your lovely gesture so could share your instant gratification
Have had issues on UPS before, there are many options to specify input and output setup as they can be configured for many countries power system. Very easy for your customer/specifier to make a mistake in the config unless a server engineer AND an experienced sparky. Take the covers off and check against manual you downloaded to see if actual setup makes sense!
JFC... well done keeping cool with people looking over your shoulder and a camera to talk to. Hell of a bang, not once but twice. Am a learner myself, never had anything to do with UPS supplies but can be sure that if I ever do, I'll remember this video and check for links.
Well handled. Amazing that you released this video.
Why not?
Fair play putting this out mate! The ending was hard to watch as I’ve been in a similar situation, nothing UPS related but I shorted out 2 phases on a big db in a mechanics MOT workshop that had about 15 guys trying to work on cars and I’m there nearly blowing myself up in the corner and taking out all their tools and equipment 😅 I wasn’t very popular but these things happen!
Bloody hell Lando that could of been worse than a 200mph crash in your McLaren 😜 Glad your ok I did panic a little myself inside when that blew took a lot to stay calm especially with that noisy alarm going on.
Nicely handled 👍🏼
He without sin cast the first stone. 🙌 Great Spark. Quality content.
You shouldn't blame yourself for this. The UPS wasn't installed to spec. You handled this like a pro, I'm sure the customer would have you back after seeing how well you handled this.
It was installed to spec, but it wasn't part of the project. If it was part of the project, then the whole RTFM process would have happened. This was the missing link here, glad he's okay and the equipment is okay.
Nothing like crap going wrong in a data center, mad respect for guys that do this work.
Obviously not installed to spec, though. It may have been installed correctly according to the manual,but not to spec, unless whoever was providing the spec fucked up. And maybe there was no project manager overseeing this… but I’d bet you there was.
Well done, Cory!! You dealt with it like a champ. Scary stuff
The gentleman of the sparks lol 😂 lesson learned - onto the next. god speed brother 😎🤝🙏
As an IT techy, this is exactly why I had the UPs installers give me a wiring diagram for the UPS that I could pass along to the sparky. I think this can happen to anyone, especially if the UPS comes from factory with a requested config and it isn't checked by the UPS install team who just assume.
Is there any way you could have tested this so you could improve safety checks in the future?
Oooofff!! a 50 amp 3 phase short circuit, I feel sorry for you. This is sort of stuff is why sparkies are top tier tradies.
Well at least you made sure at the end that the input was working, my old company had contractors come install DC UPS systems in our tower shacks. The batteries were pre charged and they did the power swap over with everything staying up until 12 hours later. They left both of the disconnects for line and generator disconnected. The same contractor went to a remote tower for the same type of install, the backup generator was running for the 2 days they were on site, they and no one else to include our generator contract company thought to say anything with the generator company monitoring fuel and refilling daily for 12 days; I get a call at 3am that our tower is offline and on arrival find my employer had bought utility poles from a power supplier, they removed their meter but put a blanking plate in place leaving the connector plate in the dirt at the pole base, a $20,000+ generator lost its life that day because they aren't designed to run with low oil with the fuel delivery person and UPS contractor silencing the horrible alarm when it was on.
Jesus man that was wild ! Glad you're alright and things got sorted in the end !
I knew it was coming, but my heart sank when it all went wrong. You start to doubt your own sanity.
Well done for putting this video out there….not many TH-cam sparks would
Fair play mate....You got it figured out. Kudos.
Found you at last since artisan departure. Favourite electrician ...for the poetry..and madness 😅
Nice one Cory not many would show this part , but fair play you mastered it 😊
7 minute mark, or just go for clear heat shrink and a regular label maker much cheaper and now you can have any size that you get the clear heat shrink
Wow, that seems like a bit of an oversite by the UPS manufacturer, that link bar should have not been installed by default and should have been included in a bag with instructions to add it if using a single phase feed, good on you for testing all of the stuff you installed before turning power on, and handling the situation as well as you did.
I agree, OEM is very unlikely to supply with link fitted. I wonder if the the supplier tested the UPS on single phase in a workshop then forgot to remove the shorting link?
The other racks were single phase, bet the guy thought is was the same here. If only tails were provided, you’d never know.
While it is true that the CPC should be longer, the design of the socket is intentionally crafted so that the CPC is the last to pull out
Just a thought outside of the box........
If space available in Distribution Board area and
If the server room is on its own circuit you could have chosen a 3phase SigEnergy Inverter + 1/2/3/4/5/6 8kw Batteries. With 0ms switchover it will offer complete UPS fail over for the networking kit.
Every day is a school day, as long as you are ok, is all that really matters 🙏☘️
so in the future you will be checking for continuity / low resistance on the load side too
Super video Cory, what a cool head you have. Professional.
Thanks, Colm! 🙏🏼
i was screaming at the screen, check the link out bar 🤣no one was hurt and helps others in future, so well done mate. i recently had a 200a Glasgow switch go bang , all tested fine before switch on, just a shame the ***t of an installer didn't seem to know or care the whole fuse carrier moves on switching and decided to jam a cable up the side of the carrier
I enjoyed the vid... I like seeing people fail (not in that way) but in the way that others can learn something from that failure, thus = more knowledge spreading. Good work solving it.
That just goes to show how shit a lot of the modern kit is. Back in the 80’s if you fit a 63a isolator it would handle closing onto a fault. Now when a 63amp unit is smeller than a 32 used to be this is what you get. Same applies to motor contractors if you energise onto a duff motor it usually welds the contacts in. Having said that no feeling in the world is worse than closing a switch and the lights go out and alarms start sounding😂😂. Been there too many times before ( once it was nothing to do with me just really bad timing 😂) and all you said was “oh my god”
Oh Corrrryyyyyyy....... Wow.... Guy Fawkes would be proud. Well done for showing this & what the problem was. Top man! We can all learn from this.
😂🎇🧨
The main thing is no one was hurt and you have learnt from it everyone make mistakes
A safer test lead for those outlets is just a 13a trailing socket then use your testers plug lead. Can do dead and live tests with it then 👍🏼
@4:46 - Whoops... Hey - why is that glowing?