Joseph Cresswell
Joseph Cresswell

Time domain reflectometry... Was it Star Trek or Doctor Who which that technology came from?

Vor 7 Minuten
Vikalp Yadav
Vikalp Yadav

Would high voltage DC be better.

Vor 21 Minute
Mr behaveing
Mr behaveing

this is why we live rural residential so much better and no stressing about flooding etc

Vor 26 Minuten
bibi gabuyo
bibi gabuyo

Omg thanks for the explanantion

Vor 27 Minuten
Curt N
Curt N

Bull shyt! This was why the movie "falling down" was about. Ppl getting fed up!

Vor 44 Minuten
Larry Page
Larry Page

Very enlightening, very enlightening!

Vor Stunde
captfjparks
captfjparks

I’ve done freeze seals back in my Navy days.

Vor Stunde
RailSheepGuy
RailSheepGuy

On the Elbląg Canal in Poland ships are loaded on traincar and then pulled up a hill. Thats sooo interesting

Vor Stunde
Scrapper Pun
Scrapper Pun

A lot of scrap metal.

Vor Stunde
gemcutter187
gemcutter187

It's too bad it's so difficult. California could really benefit from underground electricity lines to help prevent fires. I always hoped in general, we'd go totally underground with the wires, as I find telephone poles and wires as a eye sore. Especially in rural areas.

Vor Stunde
xTehMoonlight
xTehMoonlight

the best thing about road construction is when its finished

Vor Stunde
Δ わるよ歩み
Δ わるよ歩み

What

Vor Stunde
Edward Gilmour
Edward Gilmour

That was interesting. Glad oil (PBC) filled cable is no longer used. The lessons being is don't put all 3 power conductors in the same conduit in the first place. Build in redundancy (4 or 5 conduits + power cables) all physically separated, which would allow faults to be switched out.

Vor Stunde
Progressive23
Progressive23

California has had many terrible fires caused by trees falling on the power lines. This year one of these powerline fires was almost 1 million acres, destroyed 3 small towns, burned most of Lassen National Park and most of the state had more than 2 months of unhealthy air quality. California needs to figure out how to bury its powerlines, as expensive as maintaining underground powerlines is these fires might be more expensive. I'm an electrician and I briefly worked in the tunnels under the University Of Washington. I was amazed to see heavily insulated 5KV and 10KV wires secured to the wall of the tunnel, I wonder if California could do something similar.

Vor Stunde
Syafiq Muhamad
Syafiq Muhamad

If u study physics in high school, this is the most easy chapter. I still remember i got A+ for the test.. the concept quite easy to understand.

Vor Stunde
Paschalis Bakouras
Paschalis Bakouras

Great video Do!! Do a video about transmitters and converters. Where hugh voltage goes to lower and home usage.

Vor Stunde
JamelArif
JamelArif

Thanks Grady !

Vor Stunde
lude69.com
lude69.com

I just watched a video about poo...

Vor Stunde
N Weasels
N Weasels

Fascinating. Also, this is exactly why we archive things and share stories.

Vor Stunde
Alex Young Kim
Alex Young Kim

I have so many questions. What are the thermodynamic properties of the oil? If it expands as it freezes wouldn't it increase hoop stress on the tunnel? If it contracted, then you have another problem. No friction to keep the frozen plug in place. How does the oil's phase change affect the microstructure of the paper? Does it form crystals inside the soaked paper? Paper isn't known for being particularly resilient. If the plug fails wouldn't it send it down the tube towards the poor people working on it? Like a big frozen bullet weighing several tonnes traveling down a barrel? THE WHOLE THING IS MADNESS!

Vor Stunde
Andy Gill
Andy Gill

Story goes: since 1989, we've all just been winging it. Some day we might be good... some day.

Vor Stunde
Daniel Martinez
Daniel Martinez

Do peoples opinions hold society back?

Vor Stunde
Cale Winslow
Cale Winslow

So basically, underground cable is a bad idea?

Vor 2 Stunden
Dennis
Dennis

Omg omg i worked on this project helping splice cable with Parkia inc only for a few months yeah the new cable doesn't use oil, that oil was nasty, i could literally see the yard up on the hill on that drone footage you showed. I forgot the name but that new cable was manufactured by a Korean company, that they sent their own people to splice the cables and we just help them with the splicing.

Vor 2 Stunden
Rafael
Rafael

While there is somewhat of a disclaimer about avoiding any political sounding aspect to this man made disaster, it is a disservice if the intent is to examine the causes of the outage to ignore the impact politics had on those root causes. For example you define the single interconnection which covers most of the state of Texas without pointing out the fact that the lack of connectedness to the rest of the conterminous United States played a significant role in the disaster on multiple levels. By being entirely isolated, Texas lacked the infrastructure to borrow from surrounding states' grids when the Texas grid failed. Why was the grid isolated from the surrounding states? To avoid federal regulations that may have prevented the disaster in the first place. Not only did a policy of deliberately avoiding oversight create the environment, which was one of lax standards and nonexistent inspection regimens, that allowed a particularly cold snap to take down most of the power in the state, but playing "one state is an island" meant there was no life-line which literally put millions of lives at risk. Freedom I'm sure if it had been some engineer's mistake in maths that led to the outage that mistake would be taken into consideration in an examination like the one presented here, so it's not really honest to gloss over or ignore mistakes made by states' residents and political leaders in pursuit of one type of ideology or another.

Vor 2 Stunden
Chandan Mishra
Chandan Mishra

Why not just wrap the individual high power line lines in a thick coat of rubber?

Vor 2 Stunden
Derik
Derik

Sad & hope for something new. Thank you!

Vor 2 Stunden
Leo B
Leo B

Permeable pavement looks like a really good thing, however, I do not think it would work in countries where there is winter. I imagine any water freezing in the space would expand and break the road faster.

Vor 2 Stunden
Adam Hass
Adam Hass

Too many ads

Vor 2 Stunden
Anonymous
Anonymous

We repair undergrund high voltage cables all the time in Denmark. Would never have thought anyone would considder it "nearly impossible" lol

Vor 2 Stunden
Ashleigh Elizabeth
Ashleigh Elizabeth

I've often griped about how powerlines and billboards visually pollute the landscape and how they are incredibly susceptible to weather damage. Having lived in rural communities where almost all of the power transmission is above ground and in suburban communities where most of it was below ground I've often remarked on how much less often residences and businesses lose power during weather events with below ground powerlines and how much nicer the landscape looks. I'd always assumed that the below ground method wasn't used as often because it was more expensive and that the power companies were being cheap at the expense of their customers. Now I realize that while I was right that it is more expensive to put powerlines below ground that it is several orders of magnitude more costly and complicated than I had imagined it to be. The next time I'm tempted to complain about high voltage powerline towers I will try to be more understanding of the complexity and costs involved. I still don't like billboards though.

Vor 2 Stunden
Lars Larsen
Lars Larsen

You'd be amazed at how bad at rigging most people are. I know a bunch of people who do circus trapeze acts, and literally none of them knew that you can't load a carabiner sideways.

Vor 2 Stunden
Archer Cillian
Archer Cillian

Now you would be fired for being that open to a Citizen.

Vor 2 Stunden
Paul Brown
Paul Brown

Thanks Grady, love your channel...cheers form Florida, Paul

Vor 2 Stunden
jim b
jim b

just add more googly eyes for mass damping

Vor 2 Stunden
cybhunter007
cybhunter007

Curious timing; was looking at a substation site plan drawing circa early 1980's with various metal pipes with cross section call outs denoting high tension lines. Since I saw the drawing prior to this video, I was thinking along the lines of phase to phase or phase to ground faults, with codification coming from a prior job (typically UG work would be of innerduct with concrete encapsulating it) you learn something new everyday

Vor 2 Stunden
GSZero
GSZero

Fun times. That was my first time being in sub-zero temperatures after moving to East Texas from New Orleans. We were surviving without power by fortunately getting the propane take filled by the skin of our teeth the Thursday before (almost missed the delivery window). The gas fireplace saved us by surviving in one room. When the water went out on the second day we found a hotel with power (again by skin of teeth after they told us they didn't have rooms. We showed up anyway and they found one). If something like that is on the horizon again we're going to visit my parents (who coincidently lost power for almost two weeks due to Hurricane Ida this summer).

Vor 2 Stunden
Roberto Soledad
Roberto Soledad

All the experts here: shoulda coulda woulda. But it didn't!

Vor 2 Stunden
Clyde Cessna
Clyde Cessna

That did answer some long held questions. Counterintuitive!

Vor 2 Stunden
lajya01
lajya01

"Close the valve slowly" Tell that to my washing machine

Vor 3 Stunden
Jessica M
Jessica M

sounds like renewables need to be a lot more more reliable to be practical

Vor 3 Stunden
Billy Russell
Billy Russell

did… did you not hear the natural gas was hot just as hard as wind? like, this is a system where neither we’re reliable, not because of actual power production design but the infrastructure that’s needed to support it also, maybe if our fossil fuel usage had been more responsible for the last 60 years, an unpresidented climate event, might, just might have not happened

Vor 41 Minute
J Games
J Games

I never thought I'd learn this. Thank you.

Vor 3 Stunden
Edwin Aviles
Edwin Aviles

The older I get, the more I realize I should have studied engineering in college lol

Vor 3 Stunden
Leander Smith
Leander Smith

Nice video and good explaining but it failed on the chemistry between the all elements; water cement sand and gravel and how much is used from any one. Why concrete has to be poured on a waterproof surface and why you have to avoid water from damping from the wet mixture. I think this will give you a lot making a second video although it hasn't much to do with science, but wrong mixing, and curing in wrong way can. I wish you good luck and thanks for sharing. From mexico.

Vor 3 Stunden
SCuba Do
SCuba Do

Everyone in Louisiana says the lines should be underground bc of Hurricanes but this explains why that's not a feasible solution!!!

Vor 3 Stunden
Poro
Poro

Well I hope this is on my bio exam, cause I'm watching this instead of studying.

Vor 3 Stunden
GSZero
GSZero

Just imagined falling as a crane collapses think "No, not right now. I'm not ready". Man I have some stuff to button up in life. Never know when that time will come.

Vor 3 Stunden
Kerry Murphy
Kerry Murphy

I admire you at the highest possible level. Amazing information and, more importantly, absolutely top-shelf mastery of communicating with your audience.

Vor 3 Stunden
jesse diaz
jesse diaz

This might be what happened recently in the city of Riverside California. Approximately 430 residents were without power for about 3 days. I saw Cruise along the streets trying to figure out where the short was. Now I can understand we're clearly what the challenges were.

Vor 3 Stunden
Peter Campbell
Peter Campbell

Dielectric oil can be cleaned and dissolved air and water removed. Done all the time in main power transformers.

Vor 3 Stunden
Nasim Bahbahani
Nasim Bahbahani

No doubt there is still thousands of miles of this pressurized pipeline running all over just waiting to unleash a nightmare on some poor engineer

Vor 4 Stunden
Esports King
Esports King

Electrical engineering and power grids, you're finally speaking my language :D

Vor 4 Stunden
Red Ram
Red Ram

Maybe it's just me, but subterranean high voltage cables in a frequent earthquake zone is a terrible idea.

Vor 4 Stunden
Daniel Howard
Daniel Howard

I thought this would be a boring video. Boy, was I wrong! Great job.

Vor 4 Stunden
L P
L P

Grady, EXCELLENT EXPLANATION 👍. Having worked 38 years for Florida Power & Light Co. I experienced underground power lines failures. Explaining to customers how much harder it was to find and repair faults in UG systems was always a treat 😤. The “thumper” brought back memories…

Vor 4 Stunden
George Smith
George Smith

👍👍👍👊😎

Vor 4 Stunden
AM 1015
AM 1015

like geogrid for a retaining wall also

Vor 4 Stunden
Bryan Haddon
Bryan Haddon

Thermal expansion messing things up again as always. Gotta consider it!

Vor 4 Stunden
Parker Dial
Parker Dial

MAGIC!!!

Vor 4 Stunden
john blecker
john blecker

That first underground high voltage sounds like bad idea.

Vor 4 Stunden
Devin Kim
Devin Kim

Human ingenuity amazes me sometimes

Vor 4 Stunden
Dead Soul
Dead Soul

Does my dude live in Evansville, IN?

Vor 4 Stunden
bob bray
bob bray

"The future is plastics!" How true, said 50 years ago in The Graduate. The new power line uses polyethylene insulation to replace the oil. The first PE patent was in 1937 and it took many decades later for wide use. PE is the most produced plastic worldwide. It's beneficial uses are extensive. Problem is that PE is also the most abundant microplastic worldwide. Plastics are the most incredibly diverse product ever made but we need to find other consumer packaging materials that don't stick around forever.

Vor 4 Stunden
Rob Finch
Rob Finch

Excellent explanation of rock bolts. Thanks for the time & effort (and expense) in setting up that demo.

Vor 4 Stunden
rocktakesover
rocktakesover

Easily your best vid. LINE WORK!!! Thanks for the upload

Vor 4 Stunden
Shaggy Anubisllol
Shaggy Anubisllol

the most fascinating historical example is probably Ubar, an ancient city thats thought to have been entirely swallowed by a sinkhole due to centuries of well digging and draining. they couldnt even find it until they mapped ancient roads using satellites and found a whole bunch of them going to what looked like an empty spot

Vor 4 Stunden
Joe Mehere
Joe Mehere

You guys very intelligent and informative videos! Thanks

Vor 4 Stunden
llubu2
llubu2

Would love to see how concrete with Graphene would fair up against the rod reinforcement

Vor 5 Stunden
Ryan Boes
Ryan Boes

Thanks for another great video! I always look forward to watching your channel!

Vor 5 Stunden
Mattijjah85
Mattijjah85

Hi Grady, have you heard about the Northern European Enclosure Dam proposal? It's a project of building huge dams between Scotland and Norway, and between Cornwall and Bretagne to save Europe from rising sea levels. Would you make a video about it?

Vor 5 Stunden
Edward Fontaine
Edward Fontaine

Excellent video, Grady. Keep up the good work!

Vor 5 Stunden
The Bench
The Bench

Fun fact. I am a machinist and occasionally make parts that ABB and other electrical companies use when handling that paper that is used to wrap the wires, if they break the paper for some reason its ruined and cost something like 20 or 30 thousand dollars to replace. I think it's something to do with how it's bought in bulk and can't have rips in it.

Vor 5 Stunden
12 Fingers
12 Fingers

I would think that the high pressure oil would be a huge problem with the level of Earthquakes that sometimes happen there, but whatever not my problem

Vor 5 Stunden
Chi Square
Chi Square

Fascinating story! I learn a lot. This engineering challenge is bold. I'd still be as impressed if this were 2021, let alone 1989.

Vor 5 Stunden
Merchant Ivory
Merchant Ivory

And if there's an earthquake? RIP

Vor 5 Stunden
db Productions
db Productions

That paper insulation is made in Bedford Pennsylvania. At Bedford materials.

Vor 5 Stunden
43labontepetty
43labontepetty

Fibermesh Geogrid. Every retaining MSE wall I inspect has it and if it doesn't I bring it up to the design engineer to make sure they have accounted in some other way for not having it. It's essential.

Vor 5 Stunden
deere72
deere72

I must have lazy potholes - none of mine work! Very little subdrainage is done on roads. It removes excess water from the immediate layers below the surface

Vor 5 Stunden