I don’t know what I just watched, but it was pleasing to my 3 am eyes

To those that don’t know what he’s doing is he’s making a 2 hour fire rated connection. MI (Mineral Insulated) Cable is a Solid copper core that carries current its surround by a fire retardant white mineral powder which is then encased in a copper sheath that’s acts as a ground. It’s intended use is in buildings with large capacity. The cables intended use is for powering emergency systems that under any circumstance must be continue to operate under the condition of a fire. MI cable will give you the minimum 2 hour fire rating and allow things like Fire Pumps, Fire alarms and various other required fire suppression systems to continue to operate even if the cable is directly exposed to a fire. Specifically the reason for such a complex process for a splice or connection is because damaging or cutting the copper sheath ruins or breaks the fire rating on the line. To retain that fire rating, special connections approved by the Fire Marshal’s code book (IFC) must be made. (Edit) re-looking at the cable type is the specific MI cable he’s using has two solid conductor’s. Mi cable has the ability to be ordered with up to 3 solid Conductors with certain size limitations.

It's all clear. Most important thing is to don't forget to put an insulation jacket on first.

As a carpenter I have no idea what this sparky is doing but he seems to.

Fun fact: Terminating cables actually makes you a Terminator.

Для тех, кто не знает, что он делает, он делает 2-часовое огнестойкое соединение. Кабель с минеральной изоляцией представляет собой сплошной медный сердечник, который пропускает ток через огнестойкий белый минеральный порошок, который затем заключен в медную оболочку, действующую как заземление. Он предназначен для использования в зданиях с большой вместимостью. Кабели предназначены для питания аварийных систем, которые при любых обстоятельствах должны продолжать работать в условиях пожара. Кабель MI даст вам минимальную 2-часовую огнестойкость и позволит таким вещам, как пожарные насосы, пожарная сигнализация и различные другие необходимые системы пожаротушения, продолжать работать, даже если кабель непосредственно подвергается воздействию огня. В частности, причина такого сложного процесса сращивания или соединения заключается в том, что повреждение или разрезание медной оболочки разрушает или нарушает класс огнестойкости линии. Чтобы сохранить этот класс огнестойкости, должны быть выполнены специальные соединения, одобренные сводом правил пожарной охраны (IFC). (Редактировать) повторное рассмотрение типа кабеля показывает, что конкретный кабель MI, который он использует, имеет два сплошных проводника. Кабель Mi может быть заказан с 3 сплошными проводниками с определенными ограничениями по размеру.

Good job brother. That’s some grade A work right there. What is happening?

Nice Job Bro! - Couldn't have done it better myself, especially since I have not a single clue what just happened here & I thought I was an electrician.

I like the part where he terminated the mineral insulated copper cable.

“Terminating Mineral Insulated Copper Wire” I only understood two of those words but this looks like a banger

I haven’t used MICC in years but that’s a skill you never forget. Very satisfying to watch

That seems like a lot of work, even with all the extra tools used to help speed it up

You can tell this is a genuinely informative video because there's no shity music playing.

I have no idea what that is or what you even did... but it was impressive.

“This one cable has kept our home lit for generations. And it will continue to do so for generations to come- WHAT DO YOU MEAN YOU SOLD THE HOUSE?!”

I like that there are things that the public (me included) has no idea exists but are designed to help save our lives.

I didn't even know what this was or why it existed... But learned it is still the critical backbone of fire alarms in may buildings. Thanks for teaching me something new!

Making off MICC is a forgotten art. Nicely done! 👍

Thank you bro....Micc cable termination is not as simple as it looks... I have done it

me, an intellectual: “Ah yes the chili pepper method 🌶 “

How did this become so satisfying.

Brings back so many memories this does I used to love finding earth faults on Micc cables and not everyone’s cup of tea in the fire alarm world but I had some of the best mentors you could ask for and worked with lots of amazing intelligent electricians and engineer who helped me more than they will ever know. Lucky for me right place right time I guess.

I learnt to do this as an apprentice in the 1960s. The biggest fault was not doing an insulation test before putting in the sealant. It needed to be as high as possible due to our voltage of 230/400Volts.

You can tell this man is dedicated. Just listen to his breathing

We call it MIMS (mineral insulated, metal sheathed) in Australia, and it’s been decades since I’ve done it.. 👍

Brings back memories of college and 15th edition regs good times thanks man

This is a work of art and a true craftsman at work.

What in the name of MacGyver is going on here 😲😵😂

I have absolutely no idea what he’s doing but it’s satisfying watching all the parts get put together and stuff

Good to see the technique has hardly changed since I completed my apprenticeship in 1970😊

I was on a job as an apprentice & we had to install 500mc MI cable. It was hell

Нихуя не понятно, но очень интересно 👍

He is a next level sparkie.. clean workspace and no energy drink. That's a rare sight! Lol

Prior to those stubs we used to use a plane disc (with appropriate holes ) and beads inserted into the ends of the sleeving to make a stub /sleeve assembly.

Impressive. I am an electrician with 35 years experience and impressed what a good job can be done with the proper tools. I have worked with that cable but struggled with old worn out equipment.

I have done this once as an electrical apprentice many years ago. it takes a lot of skill. Thanks for posting this. Brings back memories.

Why did i think he was gonna shoot the wire like a bow and arrow when he tried to straighten it😂

I used to do this sometimes when I worked as a fire alarm installation engineer. The cable used is commonly known as pyro, is extremely durable (can withstand blows from a hammer), fire proof (hence the name), and as you can see, time consuming to make off (takes a lot longer than 60 seconds). Looks very neat when installed well though and will last for a very long time.

I was super confused the first time I see mineral insulated cable. It was in a refit of an old Vinyl Factory in London.

bet this nightstand lamp will look nice

Much respect... Don't know why... all of a sudden, I feel like I need to learn a craft 🥸

Man I couldn’t imagine how long it would take to do that at every location in a new building with lots of feeders like a hospital or something. Very cool none the less

Reminds me of the days I used to wire control panels with multi core Pyro on chemical plants, Interesting work that was, once you get used to handling it and dressing it, it makes a really neat, tidy and impressive finished job.

This is mineral insulated cable. The red sheath shows its being used for a fire proof circuit. The mineral powder absorbs moisture so the end has to be sealed with the fitting shown here.

Fascinating! I love that craftsmanship on MI cable that the public hardly ever gets to see, great video!

Don’t know what just happened but i can tell that dude’s skilled.

Haven't done this in a few years. Used to work on churches, and it's used a lot there. Very satisfying.

I first came across a mineral cable in my teens. I was changing the old consumer unit (ceramic fuses) in the garage. Boggled me how the copper stayed apart through the various 90° bends.

The only part thats missing is testing between the cores and finding a short, before lobbing all the tools across the room and storming off to get some FP400

Thanks for this. I managed to find my potting tool box. I'm now going to waste half my day trying to find a piece of pyro in the back of the workshop just so I can pot it.

This product is as old as the hills, I used it extensively in the late '60 - early 70's. I used to install fire suppression systems in warehouses and the wiring needed to be both fire and explosion proof rated. This product used in this video is from a company called Pyrotenax, it's extremely expensive and tedious too install.

MICC installations can look wonderful, and none of the more modern fire resistant cables come close to the same performance levels. It's also favoured in many old historical buildings is it's compact and discrete (or it is if you don't have the garish red plastic covered stuff).

This is something that costs a lot of money to have done in the field. I am a 351 electrician and have personally had to hire a certified MI Cable terminator. Not cheap. Or you can pay the factory big bucks to terminate and then you pray that your wire measurement was spot on!!

Been a sparky for 40 odd years and never used pyro.. I loved it at college though the way you could smash it with a hammer and still pass an Insulation resistance test.. 😎👍

Thanks! I never saw a mineral insulated cable being glanded before. I was wondering how they were doing it.

I haven't terminated pyro in years, a good demonstration.

Blimey that brings back memorys. Can't remember the last time I worked on MI cable . Worked with it a lot many years ago . Used to love working with it 👍👍👍

Can’t believe you can do all of this during an earthquake.

The borderline-Parkinson’s and the mouth breathing really show the level of pro this guy is. 10/10 actually enjoyed.

Oh those were the days of pyro.

UKposts algorithm works again! Was actually trying to teach myself how to do this the other day. Thanks for the post guys genuinely helped loads

40 years in the trade and the only mention I've come across is in the NEC. Never seen it in the field, let alone seen it terminated. As in any craft, the right tools and experience are key. Also, it's a whole different ball game in extreme heat or cold 10 feet down in a manhole or 10 stories up on a scaffold.

Sign of a true SPARK being able to terminate an MICC gland

Take me back to college days. 😂

MI5 building is predominantly wired in H grade pyro. All the fire alarms in royal courts of justice are done in pyro,some bare stuff too in listed areas

This man did a thing that’s smarter than my brain bag I sometimes keep stored in my head space. Fascinating to watch and just another reason I don’t mess with electricity. I confuse myself with it when trying to figure it out, so I’ll just pay a pro to do it instead.

Me watching the first 5 seconds "what a macanical Bayblade launcher" 😂

Nice reminder of the past, I did a London Underground station fire alarm and a few schools and churches. I think it was 100 quid per point back the then! I would use a tiny bit less putty, leaving a small air pocket to one side ensures the seal seats better

А я все видео думал "и зачем ему перец на проводе?" А это оказалась термоусадка😁

Wow blast from the past. I haven’t used that stuff in over 25 years. Fun to watch and see it again though, thanks.

Lovely work, It’s been many years since I worked with MIMS - I used to love it. 👍😊

Nothing like high quality specialized tools for the job.

Sparky's always showing out with their toys. And yes he'd be the one to hire for a correct job 👍

Пояснительную бригаду пожалуйста, я ничего не понял но выглядит интересно и полезно

For a second I thought he was gonna make a comically large alligator clip

I'm an electronic engineer...weird as it sounds but sometimes I just love putting cables together...so long as I have the right equipment at the time. It's when you get a lovely neat and tidy layout put together that gives a bit of satisfaction.

MICC is fire resistant. You will see Exit signs and fire alarms wired with it, for example. When I first started work as a trainee builder this was called pyro. But the modern name is now MICC.

When as a first year apprentice in the 90s we had to spend a month in the stores counting and sorting loose micc accessories to correct gauge into there own draws as well as circuit breakers and conduit accessories etc from everything that came back from jobs extra and just dumped over the years, counting how many.

For those who don't know. This is what you watch randomly in the middle of the night and have no idea what's going on but it is interesting as hell and you should be sleeping instead of looking at your phone.

MICC electrical cables are used in circuits designed to withstand fire such as a fire alarm system in a building.

MICC CABLE. Becoming a more and more specialised type install, I very rarely see this specified on new installations. This will become a lost art in the years to come which will be a shame as it creates a built to last installation.

Only 2 things I do extra. Whilst stripping and potting I put the putty under my arm pit to warm it up and after the pot has gone on I use grips/pliers to pull the cores straight to ensure they haven't twisted inside the pot before I put the putty in. Also use a bar of soap before stripping.

27 years in the biz ain’t seen this. Good work.

In 35 years in the fire protection industry I’ve never seen any MI cable. When we need a 2 hour rating, we use conduit. We also have CI cable (circuit integrity cable) that just has a way thicker rubber coating on the conductors. High rise buildings usually have a fire alarm riser that will go up through a series of electrical closets that are stacked up the building. These closets have a 4 hour rating

We call this pyro cable in uk

I love when you have everything around to make the job easier. I almost never get the right tools to get the job done so its always just make the best out of the situation im in. 31yo and gotta say im getting good at working with shitty tools.

I've done thousands of those, never needed a straightener and always tap out the excess powder before filling the pot. 8.5/10

I’m a masonry but I find electrical work fascinating.

You’re supposed to just twist them together and wrap em with duct tape. This guys doing it wrong. I’m a master electrician so I know.

Dam long time since I’ve done this. Brings back some memories. 1st job they gave me as an apprentice in 88.

I really enjoy working at MICC

Ahh good old pyro, used to hate doing fresh Installs back when I used to do fire alarm work. 20 years ago now since I had to do any .

Wasn’t prepared for someone to aggressively breathe in my ear. I feel violated

Man I just love watching ppl do their daily..small or big we all have our part to play..ppl make shit happen..🤝

Anyone wondering this is MI cable (Minerally Insulated), it is made out of solid copper basically, with an outside shell of solid copper, then a thin layer of magnesium oxide powder, then a solid copper core (which is the actual electrical conductor) then used in place of other wire bc of its high burn temperature and is meant to burn for up to 2 hours before any issues. It is used for fire pumps, etc. so if the whole building is on fire, the MI cables jacket will not burn up to two hours. I have been running this shit for the past three months. From 350,000 circ mils, 250,000 CM, #12-2C AWG ,#2 AWG, 3/0 AWG, etc. and it’s a SOB! This smaller size, which I believe is a 14-2c (#14AWG - 2 Conductor?) isn’t that terrible but, pulling the 250’s, 350’s by hand is TERRIBLE! The other trades on this hospital project think we’re plumbers or fitters bc this looks like copper pipe (and feels like it, except it’s solid in the middle!) the only way to shape it is hitting it with a hammer and using pipe benders to make bends in the run, then bundle and secure it with worm clamps. This will def make a man out of you!

When I got into pyro back in the 70's doing fire systems everybody hated it bit I loved it and became a master at it and because back then it was bare copper sheath you could make the finished job look really special, I never used a straightner I would whip it. It started to die out when fire systems went to a normally closed circuit instead of what was then used, a normally open circuit, simple really, saved a fortune in copper as the industry went over to PVC. Shame really as I was the king of pyro.

I love this video it took me back when all I did was terminate MIMS cables from 1mm 2 Core to my largest cable I terminated was 1 core 300mm it was always satisfying making sure no moisture, no dead shorts, belting them with a mallet to straighten them for aesthetics not used as commonly now due to price (copper and labour)

Haven't made one off in over 15 years ! I can smell the potting compound from memory tho

I’m gonna assume this is what airport security is looking for when they X-ray your bags lol

I did most of my apprenticeship installing pyro…I bet 95% of sparks now days can’t make an end off!!😂