Electrician Hack - How to find out how much wire is on a reel
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- čas přidán 27. 06. 2023
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The most gangster trick is the wire manufacturer shorting you 50 feet on that new spool.
That’s exactly what I thought too
😂
It’s some real truth
Not necessarily, the meter could be reading anywhere from 0.90 to 0.99 Ohms. He needs to buy a proper meter with better resolution.
Bring your tester to the store, easy peasy 😂 once you’ve exhausted their stock then you’ve grounds for a lawsuit and you can retire
Most gangster shit ever when I pull this trick out on the field and leave the rest with their jaws on the floor amazed how smart I will look.
the Kingdom of GOD is coming…“Silver is for the kettle, and gold for the furnace, but The LORD is the tester of hearts- Bible” your heart is like discovered silver, dirty and not pure, when silver is purified it is melted over and over, to the point that when it’s melted and glows red hot, it is pure enough to see your own reflection in the puddle, so also does the LORD purify your heart, till HE can see HIS own reflection in it, seek the LORD and be reborn, ask The LORD to renew and restore you, repent and be baptized for the forgiveness of sins, Jesus died so that our sins will be wiped away and so that we could be made new, if would be wise you would be wise for yourself, pick up your cross and deny your flesh and follow the path of GOD, for The Kingdom of GOD is at hand, in JESUS MIGHTY NAME Amen and Amen
I just said the same mate!
Bruhhh I'm finna try it
@@juanit0tackit0tackito2 Solid!
Top KEK!
Peace be with you.
Be careful folks, remember that multimeters are only approximate. That reading of .4 ohms could really be anywhere between .3 & .5, so you may only have 150 feet on that spool.
Actually the most gangster electrical trick is running an extension cord from your neighbors house...
My boss owns a bunch of rentals and a couple trailer parks and a lady was pulling 30amps from the neighbor on each side of her with a 20 amp plug and a 15 amp extension cord in each panel. She is in jail for it 😂
@@donttreadonmeoutdoors7574 that lady is gonna be running the tier in watever jail she's in...
How about automotive jumper cables spliced into the electric main supply attached to a house before it goes into the meter... Then attached to an extension cord to steal power for the house next door?
Have a pic on my phone, wish I could share here.
Tap the light pole And change your opinion
LMAO
Here's another trick: If you have a wire with a broken conductor but you can't find it visually, check the capacitance across each end. The ratio between the two values will give you a *very* rough position to check. It is most likely to be useful if the break was caused by metal fatigue at one end or the other, as just _bending_ the wire will change its capacitance. It has saved me a lot of time because I knew which end of a power cable/etc. to cut back and redo.
Cheers!
Whoa! Question - - can this work on a sprinkler under ground 16 gauge wire trying to roughly locate where it got accidently cut?
@@Son_of_Aragorn doubt that would work, capacitance would be unpredictable.
My boss is always like walk this out and find out how long it is. Not anymore buddy haha
Oh no, don't tell him that!
Take a reel, go somewhere safe, measure and enjoy a bit of free time! :D
@@ogi22Now, THAT’S some gangsta sh#*!🤙🏽
If you tell him, you're dumb as hell lol
Yeah but that'll backfire when your coworker who also watches electrician U gets a raise when he shows boss man this time saving trick. What? It could happen! 😅
Edit: yeah, I get it. No raise for that. Good job. You figured it out 👍
@@truthbebold4009 Risk-reward. You have the knowledge. How you use it, it's up to you :)
This is why i love hanging with the elders..... they got experience, knowledge, and the wisdom to know when to apply that knowledge...
I can say this would have come around when they where sitting learning how to calculate load and one person going hu If I do it like this I get distance on a roll.
This is basic level electrician knowledge. The smart thing to do is write how many meters are left every time you use some of it. We always wrote how much we used so we always knew how much was left. A lot of cables also have the lenght of the cable written on it so if you had a 500m roll and you are now at the number 450m you know there will be 450m left and you took 50m. This seems like a smart thing but is a really complicated way to find out how much cable you have left considering the other options.
There isn't a single bit of wisdom here. Just physics. Idea that experience has any value is complete trash because it's about the quantity of it, not quality. It doesn't matter how much you've seen, if you don't or barely understand it. Understanding is important.
They teach in the first year of EE
1st thing you learn when starting Electrical Engineering is Ohm's law & how you calculate resistance based on it's specific electrical resistance, length & cross-sectional area. Any student just starting electrical engineering or physics knows this already
Every electrical engineer is rolling his eyes
One significant figure. That's all it his multimeter provided. Plus there are margins on the resistance values, so it could be slightly more or slightly less.
To really do this well you should measure your brand new spool to get the resistance of that batch of wire and use a more precise multimeter. It does give a reasonable estimation, but I wouldn't trust it if I knew I needed 300 feet and the resistance value told me I had exactly that amount.
@@zwink37The way the multimeter is beeping, it looks like he has it continuity test mode, not resistance mode, that's probably why it's not giving a precise number - no idea why he did that. Also, he's touching the probes on his bare fingers - sweat on his skin will add to the inaccuracy.
@Jockito as far as continuity goes, it's usually more sensitive than an actual ohm reading. Fingers on probes continuity no beep, ohm reading 1.3Mohms. Not a proper way to fully determine the length, but rough estimate sure.
Just wait til he finds out that the diameter of the copper is usually smaller than advertised. Also, the purity % changes the ohm value per ft too. A cheap roll can have 500ft of wire but ohm as 650ft. Never trust the process. Measure your rolls when u inventory
Electrical engineers are on the very bottom of the totem pole for engineers….
1st- Get resistance rating
2nd- Divide 2 ohms by measured resistance.
3rd- Divide 1000’ by second step answer.
1st-.4 ohms
2nd- 2/.4=5
3rd- 1000’/5= 200’
You’re welcome
actually a much better way of describing it:
(R / 2Ω)1000=L
R is measured resistance
L is the total length of the wire
Thaaaank your siiiiir
Thaaaank your siiiiir
Just multiply whatever number is on your meter times 500 for 12 gauge wire and about 800 for 10 gauge
@kllgrogto5838 about 800 or exactly 800?
AS a retired tradesman I can tell you the old guys have all the tricks they don't teach you in school.
I finished level 1 trade school last month and this is taught in code class.
We never really use that trick though. It's usually looking at it and saying 'Eh, that has about 70 foot left'.
They teach this in school. Most people just don't pay attention.
"they dont teach you in school" has the same energy as people learning "hidden" compartments/tools/features on their vehicles because they never read the owners manual.
Yes sir
I’m glad there’s people like you because even after you explained it I have no idea what to do when it comes to electricity. Thank you for what you do
Think about dragging a long rope on the ground. Each part of the rope has friction on the ground so each foot you add adds more and more force you have to pull with. If you know the force you are pulling with, and how hard each foot of that rope should pull back, then you can calculate how long the rope is. For the wire, the current encounters resistance that is a property of the material it is made out of and the geometry of the wire. The longer the wire, the more the electrons have to try to get from one end to the other similar to pulling the rope. Not a bulletproof analogy probably but it seems to do the trick.
You can also do it a lot more effectively by using the voltage drop of the wire.
Hardware electrical engineers use this all the time with trace lengths.
Its so easy
@@WatShmatgood analogy
It used to be the same for me but learning how electricity works has become an incredibly useful tool on my belt. I'd highly recommend learning it.
If you really want accuracy and just want to use basic tools, get a power supply capable of supplying a constant current of one amp.
Connect it to the wire with an ammeter if your power supply doesn't have an accurate readout.
Put your DMM in low range DC volts and measure the voltage at the wire itself. The voltage is the resistance, and you can reliably measure down to single millioms with the percent accuracy of your DMM. Even the cheapest DMM should be within one percent.
Yeah, the meter is not accurate enough, additionally the test leads and the voltage between dissimilar metals will mess with the result. Either do the 4-wire method yourself, like you described, or use the bench meter in the shop.
Also allows you to spool out a short section and measure the resistance to know the actual resistance per unit length if you want to eliminate the uncertainty of whether the wire diameter and composition match the table references. It's likely to be quite variable.
By that logic the accuracy of 2 decimal places can be as much as 90 feet give or take. Weighing the roll gets you within 5 feet per 1000 foot roll. Weigh an MT spool, weigh 1 foot, weigh partial roll. Subtract MT spool, divide by weight of 1' of wire. Done, within 1 foot give or take.
We use this exact method for PI at our battery cable manufacturing facility so can confirm.
@@ammoses3 Forklift battery repair was where i started the practice myself. Works real good on 1 2 and 3/0
Ok so how do you do it in the field?
@@flipfloptanlines926 You might have been repairing our cables...
@@jorgeo1492 With your scale. Just like an AC guy, if thats a tool thats required.
You’re the only dude that actually read the manual. Great advice
wish he'd read a thesaurus to find a better word to use than "gangster"
@@peepocozy8594🤷♂️
or you can just read the lettering that's on the wire it'll tell you how much is left on the spool
@@peepocozy8594 RTFM
Here are several recommendations that Google's new AI made in order to determine how much wire is on a spool.
- Measuring a sample of the wire and the spool, then just subtract the weight of the spool.
- Harris TS100 Cable Fault Finder: This tool can measure the distance to the end of the wire.
- CableAWG wire gauge chart: This chart shows resistance per 1,000 feet
- Milli-ohm meter: This is required for shorter lengths of larger diameter wire
- Micrometer: You can measure the diameter with a micrometer.
- Multimeter: (This is what the gentleman in this video used.)
It’s times like this where i NEED the bookmark to “My Favorites” button.
I watched it 5 times in hopes of remembering it for the future.
If your on mobile, click the three dots on the top right and you can save the video to a playlist.
Or use a pc and save the link 😊
Or just write the equation/info in your notes app on your phone so you don’t have to watch a video every time.
@smartpowerelectronics8779 Or just use a mobile to save the link, click the share button and then copy and paste the link
I just downloaded the video n then saved it to my must watch weekly 😅
The most gangster shit is buying yourself a broom and cleaning up your own mess. (Of all the electricians I've known in my years in construction, I've only met 1 that cleans up after himself 😂)
LOL,, this is the best ,"gangsta" comment of em all, you gotta be an old skilled trade guy ❤
a pretty close tie between brick layers and electricians.
Oh heh...another electrician broom joke heh heh heh
Ooohhhh daaaamn! This comment is the most gangster shit ever
I was picking up after myself on a job a few weeks ago and the boiler guy told me to stop. I look at him and he has his phone out. He says : "I have never seen a Sparky clean up after themselves."
Valuable info. 2-ohms per 1000ft & finding with a device's value to determine the length in a remaining reel made it simple. Thx ✌🙏🙏
_"According to my meter and all this ohm calculation stuff, I've got 200 feet of wire.... plus or minus 150 feet."_
I was about to say this is a wire wrapped around itself multiple times with likely not extremely consistent quality and thickness.
What in the world could be the tolerance and interference.
@@seemlessliesthe fact that it’s wrapped changes nothing in its DC resistance, the wire tolerance is impeccable, and interference would hardly affect anything in the DC reading. The reason why this method is stupid is because the wire resistance is too low for the meter to consistently discern; it’s readout can be inaccurate by like .3 ohms which makes a big difference when you’re never gonna be dealing with something over 1 ohm
I generally agree that this is inaccurate in some situations (certain meters), but a lot of professionals use high quality meters, and it is possible to measure milliOhms. So it ultimately depends on the meter used.
@@seemlesslies Its a DC measurement so no interference and if you had a meter that did bit better Resistance measurement it is actually useful. 0.1 ohm resolution aint that great for bigger cored wire. Oh and wire (in Europe atleast) needs to be VERY accurate and to spec or it cant be sold
Short the leads. Calibrate using the , "rel", function, so the meter lead resistance isn't part of the measurement. On some meters, you can get an extra digit for small measurements, check your manual.😊 Even then it's just an approximation.
im the kind of guy who just bring much more cable then i need
Yeah just better to be prepared, plus there isn't really a downside to having more
I'm the same way when I go on a road call. Always go way overprepared.
Always better to be overprepared than under. 👍
Than: "Am I a joke to you?"
@@pottyputter05you gottem first
Yep that's real talk was I was thought that by a young fella myself, one of the biggest reasons we need to share the wealth. Otherwise the knowledge is wasted. It gets lost. Definitely one of the reasons why we need to stay in touch with the older generation it is not a waste of time. It is a learning experience. They have so many stories to tell and so much knowledge to share if we would just slow down and pay attention, their knowledge is priceless
Meanwhile, network cable has the measurements printed on the jacket. :-)
so does tps twin and earth in Australia
Not when it's a partial like he is talking about
@@coldsteel2546 I'm no electrician but could they be saying the jacket has measurements along the whole length? So you could 40m off a 100m wire and it will have a 60m marking there
@@codypieper728that’s correct
I usually write on the roll how much I took and subtract it from the original lenght
🤷♂️
Some mfrs just WANT to do all the extra unnecessary shi-, I assume it probably makes them feel more accomplished and boosts their ego.
I never understood why wire manufacturing companies don't just print the lengths going down the side on the plastic coating to eliminate all the extra unnecessary bs error and guess work, but that would ultimately probably throw off their profit margins if workers didn't make constant errors and have to buy another spool of wire, and we couldn't have that lol
@@G00gLe_was_my_idea989some do. Allot of comm wires have lengths written on the coating
🤯 What??? You can do that??? Lol
Yeah, but that's not very gangster.
I worked with a retired electrician at my dads place. He showed that to me one day. Pretty neat! Miss you Jerry. Rip.
the Kingdom of GOD is coming…“Silver is for the kettle, and gold for the furnace, but The LORD is the tester of hearts- Bible” your heart is like discovered silver, dirty and not pure, when silver is purified it is melted over and over, to the point that when it’s melted and glows red hot, it is pure enough to see your own reflection in the puddle, so also does the LORD purify your heart, till HE can see HIS own reflection in it, seek the LORD and be reborn, ask The LORD to renew and restore you, repent and be baptized for the forgiveness of sins, Jesus died so that our sins will be wiped away and so that we could be made new, if would be wise you would be wise for yourself, pick up your cross and deny your flesh and follow the path of GOD, for The Kingdom of GOD is at hand, in JESUS MIGHTY NAME Amen and Amen 🙏 o
Let me guess, het got electrocuted?
@@SixDasher no…actually he died from cancer jerk.
To Jerry!
you're also measuring your own resistance if you hold the leads. so you have two parallel resistances, the math may be complicated so better to just use alligator clips.
Dry skin resistance is orders of magnitue higher than the resistance of the wire. Its insignificant. Do the calculation 1000 feet of #10 awg is one ohm. Dry skin is greater than 100k ohms.
yeah but R(big) || R(small) ≈ R(small)
Only a problem if you’re limited on test equipment or don’t adjust some settings to more align with the resistances you expect from whatever you’re testing
if anyone is curious, the formula for parallel resistance isn't bad.
1/totalRes = 1/R1 + 1/R2 + 1/R3 + ......
so for 1 ohm in parallel with 100 kohm, the effective resistance is 0.99999
Some call it gangster shit, some call it science. The old man who found it 200 years ago was called Georg Ohm.
Remember to make sure your meter is accurate enough for these kinds measurements. This should not be assumed. Ton of cheap meters are way off with small resistance measurements.
U can test any meters' internal resistance AND LEADS, by touching the leads togething. Note the resistance measurement, and subtract for accuracy. Meters AND LEADS have a +/-. Is how resistance works. And that is gangster knowledge.
@@YU-ic1cwlevels of gangstrocity
Check a fresh roll or two for a baseline. The others should be some fraction. You could do this for other gauges as well.
Like with most things you buy cheap ass meter. You get a cheap ass result.
@@davidlabrosse9661 w ur highfalutin and inflated mindset. The red headed step child's dvom will work just as well as ur daddys bought fancy pants fluke. Ooh, Oops.... that's a bit harsh, I'll still post it though, cause it's true.
Now you’re the old man passing it down too me! All jokes aside, I never thought I’d watch a short with LEGITIMATE information.
Need to account for the resistance between the meter leads - touch them together and you'll probably get 0.1 or 0.2. Not that these multimeters are made to be that accurate at the milliohm level anyways though. Don't trust this "trick".
Going to send this to all my Electrical Inspector friends. i do Structural and it's cool to me. They will love it.
this is actually a super useful trick that ill keep in my head from now on
Damn dude you're a baller! So glad I randomly found this channel
the Kingdom of GOD is coming…“Silver is for the kettle, and gold for the furnace, but The LORD is the tester of hearts- Bible” your heart is like discovered silver, dirty and not pure, when silver is purified it is melted over and over, to the point that when it’s melted and glows red hot, it is pure enough to see your own reflection in the puddle, so also does the LORD purify your heart, till HE can see HIS own reflection in it, seek the LORD and be reborn, ask The LORD to renew and restore you, repent and be baptized for the forgiveness of sins, Jesus died so that our sins will be wiped away and so that we could be made new, if would be wise you would be wise for yourself, pick up your cross and deny your flesh and follow the path of GOD, for The Kingdom of GOD is at hand, in JESUS MIGHTY NAME Amen and Amen 🙏 o
Thank your algorithm (:
The "old man trick" came from someone reading the manual and doing basic math... I don't know why those are hard for today's youth.
Couple of things to consider here:
1) The graph you were showing specifies resistance/distance at 75 degC and since the copper resistance is dependant on temperature by the following equation:
R = Rref*(1+a*(T-Tref)), a = 0.00393
Which means that the resistance you are measuring, lets use the ~1Ohm measurement as an example, at what I would assume is room temp = 25 degC means that the resistance of this wire at 75 degC.
R = 1Ohm*(1+0.00393(75-25)) = 1.1965 Ohm
This would mean that your measurement corresponds to
L = 1.1965 Ohm * 500 feet/Ohm = 598.25 feet ~ 600 feet.
2) Typically multimeters are not good for measuring low resistances this has to do with the low supply current combined with a two lead measurement approach which does not account for the resistance in your measuring lead. Let me give you an example with the ~1Ohm measurement. It looks like you are using a Klein MM400 multimeter which in the measurement range 0-400 Ohms has an accuracy of +-2% + 5 digits which means the actual resistance is anywhere between 0.48 ohms and 1.52. If I was to use this directly with the resistance/distance figure you gave, even without accounting for the incorrect temperature, this would mean the length is anywhere from 240 feet to 760 feet. Which makes the measurement almost useless.
If you want to use this method to estimate the length of cable I would suggest you connect a DC power supply capable of providing a couple of amps, set the current control to a relatively high value (2-10A depending on wire guage) and then using a multimeter connected in parallel measure the voltage drop over the entire cable. Then compared this to a resistance/distance value for the temperature you are testing at or calculate the equivalent resistance at the temperature of the resistance/distance value you are using.
3) There are other factors of error like varying resistance within the cable due to factors like changes in conductor cross section etc.
Yes yes yes. Man it's depressing how many comments (and the video) display extreme lack of understanding of these basics.
+ he was touching both ends of the cable and the meter with his bare fingers, which could skew any result.
@@ShamelessFNGRL if the wire resistance is about 1 ohm, and body resistance likely to be much greater than 10k, the error from touching the two ends if the wire will be less than 1 part in 10000. So measuring a 1000 foot spool will have an error of 1 inch or less from touching the wire.
you do realize this is a dumb tik tok /YT short video and not an episode of Science journal, right? lol
**Obligatory "not an electrical engineer, just a fan"**
Does the fact that it's coiled up on the spool matter at all or is resistance unrelated to that? I just know electricity does weird things when wire is coiled lol
So glad I found this channel, apprentice lineman and finding your videos explaining a lot of my applied knowledge and helps me better understand everything. And they make me want to learn more. Keep it up boss your doing great
Oh wow...an electrician actually learned about electricity. So proud 😂
Most gangsta shit ever would be teaching an electrician how to cut sheetrock without using just his hammer.
If the sheetrock guys didn't bury our boxes, we wouldn't have to cut the sheetrock at all.
😁
I think the guy from the other short was using a hatchet
I always confirm where the buried box is by doing a single jab with my rock saw. and I'm really good at finding buried boxes. I always get it on the second try.
lol
If you're not one of the big 3, be quiet. Border hoppers can do your job.
Most gangster shit would be seeing an electrician use a broom and clean up after themselves 😉
Edit: Damn you can tell who the sensitive electrician are in here
So true
I had one that came with his own little handheld vacuum once, I don't swing that way but I wanted to marry him
@@Papamax45 Little things like this means a lot to the customers.
See I always hear that joke yet as an electrician I am consistently one of the only trades on job sites that cleans up. Usually it’s the finish carpenters that leave massive messes everywhere
@@thedopaminestop2355lies
Sjeezz, been electrician for long?
This is the most basic knowledge you learn at school.
So proud... 😂😂😂
Thank you! This is some valuable information.
Damn this was the most helpful CZcams short I’ve ever seen. Great job!
similarly
for any auto or diesel technicians, the milivolt selection on your multimeter and a trusty chart you can find online that converts fuse amp rating voltage drops to miliamps, you can find which circuit is the culprit to an out-of-spec parasitic load by checking the milivolt drop across a fuse on a fuse panel or box
@@AncientRe😂😂😂😂
That is incredibly useful knowledge, thank you👍
Brilliant! I install under tile heating cables and ohms are part of the process! Didn’t know it would work with certain wire being copper or aluminum…Thanks
This is good stuff. I went to an estate sale the other day that had a whole bunch of roles of wire. My thought was wondering how much wire was on the used roles. So I passed them up. Note to self: carry multi meter in car at all times.
Not only multimeter? You need the table reference as well because he have example for wire size 12 only!
Gave*
@@trueforum378
No.
You need a milliohm meter. Your example with 0.4 ohms ignored the fact that if you put your meter leads together you read 0.3 ohms. As long as you're ok with being off by a few hundred feet, have at it
Some of the higher end multimetrs are actually precise enough to feel the milliohms. I've bought mine for around $140, and it is usable enough to work with Ethernet and control cables for engines and ac systems. The only downside that is since he is digital he eats through the batteries quite fast and don't have very bright display, which is not fun when we work on the streets, but the thing is paid off like... 4 or 5 times already
according to the manual of my multimeter you can get a correct milliohm reading but you have to set it according to a baseline(touching probes).
Not to mention the aforementioned chart was for wire at 75c
If ur getting .3 ohms just touching ur probes together. Get better leads
@@joshuadelutis7170100% the single most important factor he ignored is temperature 😂
Awesome information that you share here. Thanks for sharing!
Thank you super great information!!
The resistance per foot will be slightly different between OFC (Oxygen Free Copper) and CCA (Copper Clad Aluminum) also, be sure you're testing clean copper (not tarnished). either sand clean or cut to expose fresh wire.
It is important when measuring that close to zero ohms to first check the lead-to-lead resistance.
If your meter can zero, do that, otherwise remember the result and do simple math.
Relax sally
Temperature affects resistance as well
If someone don't know copper from aluminium they really should get another job or redo their education. Working with electricity is not for them.
Why would you put acronyms if you are going to spell it out?
It’s more accurate if you don’t add your body in parallel with the circuit. You can hold one end of the wire with the test lead, but the other end you want to wrap the wire around the test lead and then make sure your not touching it. Since your hand to hand resistance is significantly higher than that of the spool of wire, it shouldn’t change the value much, but it does affect it.
Resistors in parallel:
RT = 1 / (1/R1 )+(1/R2) + … (so on)
The resulting resistance will never be greater than that of the lowest resistor in the parallel chain. That is why it doesn’t matter a whole lot if your in the circuit in this example because the spool of wire has an insanely low resistance compared to you. It’s just good practice to remove yourself from the equation because depending on the value of the resistor (spool of wire in this example) that your measuring, your body resistance can make a huge impact.
Guess the old guy forgot to tell him that 😂
Man, you beat me to it! 👍
Oh yeah yeah I kind of notice that myself.
Thank you lmao, I was wondering how many comments before somebody told him
lol,...thanks, Tekkie Talk,
I KNEW someone would clarify the test method,...
I dont want to refer to you as an old guy or old man....
Yep big respect to this dude thank you
Very useful my man, thanks.
Gangsta until you are 4 inches short as you finish your project and all the hardware stores are closed
That's why he carries the new Milwaukee wire stretcher!
@@PatrickKQ4HBDHe should really invest in one of those, they're great.
Who the hell buys wire by the roll from a hardware store? 😂
What f'ed reality do you hail from?
@@PatrickKQ4HBD I had to use one of those stretchers once after cutting some $30/ft coax 2 feet short after it was already on the tower and no spare spools
Read the numbers written on the wire sheath. They label the wire with footage marks, and numbers. This way you can just take a quick look and know what you have left.
Came here to say this...
TIL
💯
Sparkey #1, feeling smart, gets out his meter, "200 feet left on this roll o' wire."
Other lekchicken: "$100 bucks says theres 197 ft on that roll."
Yea that too! Lol
I have that same multimeter, I love that thing. I've owned multiple flukes and this remains to be my favorite meter so far.
Love it!!!! Thanks man 👍
Awesome tip Dustin, numbers are on spot. 0.9 equal to 450ft, 1.0 equal to 500ft. Love it!
i guess if like he said it jumps around by a tenth, then you could be off by 50 ft. not too bad getting a rough estimate though
How did you come up with that answer with the calculator and it not showing for me
@@shshshs2 I simplified the formula a bit. If (2 ohms =1000, then 1ohm =500) First reading on the voltmeter was 09. So 0.9*500=450, second reading was 04, then 0.4x500=200. If reading was 1ohm, then 1*500=500ft. Hope is clear.
yes, i thought it was not quite 500 feet myself
I don’t do electrical work, but I feel like I’ll need this knowledge eventually.
This is such a great tip!!
Whoa! Damn this will come in so handy! Thank you for sharing that!
My man just measured how tall he was with both his thumbs on those leads.
😂
??? what does his comparatively high body resistance add to the parallel resistance of 2 ohms of wire. ??
@@johnrackiewicz286 Enough to make a difference when you're looking at hundreths of an ohm. He needs to also be looking at the resistance of the test leads.
I love how you went and added your body's resistance in parallel 😂
Yup, that's right. And if he went to school for the 4 years to become an Electrician he would know. 😂
It does not matter. The resistance between your hands is at least 1000Ω, which in this example would lead to an inaccuracy of 1‰. That's not percent is promille. It's negligible. Unless you are trying to measure multiple miles of wire at once.
The body resistance is megaohms. You aren’t going to measure that against a spool of wire.
Electricity takes the path of least resistance, which would be exclusively the copper wire and prongs on the leads, as the multimeter will take a measurement of resistance by creating an extra low voltage potential difference between the prongs
@@gateswings2592 well no, electricity takes both paths. It’s just that very very little of it goes through your hands.
This is dope !!!
Awesome information that you are sharing with your channel. Thanks for sharing!
The only thing gangsta about electricians is how you get everyone else to clean up your mess 😂
This guy gets it
That’s physics. And the table is at 75°C. Resistance is lower at 25°C.
He forgot the part about sticking it in the oven at 75°C for 10 mins. LOL.
Needs a different table or correction factor. His estimates are going to be too long without
For a rought estimate, it's sufficient.
Very cool. Thanks bro
😂😂 that is a new one for me you was right that is one of the most gangster electrical tricks I’ve ever seen
The resolution of the multimeter is not enough. You are having nearly ±100ft tolerance or more with a regular multimeter. Low resistance tests are performed with higher current for this reason. Regular multimeters pass too little current to measure accurately. Even some dirt in the dial can throw your readings off by hundres of feets.
Be sure to "rel" the multimeter if it has the option. Otherwise read the reading with the probes shorted and then reading the reading with the probes on the wire and then minus the resistance of probes.
I'd be interested to see him unroll and measure the wire to compare to the meter readings.
Temperature makes a big difference also
@@wallpello_1534 0.39%/°C (for copper) isn't that big
He’s guesstimating this. Just for a quick reference of how much he has. He isn’t building a lander for NASA.
He should hold the two test-probes together and then read the resistance of this multimeter cables and connection resistance. I have her 0.7 Ohm and this you must subtract from the value you get if you measure the cable coil. If you measure there 0.9 Ohm, then the resistance of only the cable is 0.9-0.7=0.2 Ohm.
The more expensive multimeter have a calibration function to set this value to zero.
Heck yea. I like the code refrence Chapter 9 Table 8. I have learned alot from you keep it up
1974: A thing on an electrician’s exam
2024: Gangsta shit
The most gangster shit is going in my glove box and grabbing the wire extender.
Right on time for my internship (electrical engineer) and apprenticeship (electrician)
Edit: Sadly, my school only teach theories. There's a separate institution to learn practical skills (which is as expensive as college in 1 year). Hence, why I just take apprenticeship
Internship? Back in my day we start the green help off on digging ditches.
You should've already know all this. What the F are they still teaching in schools if this is magic to you???
@@SixDasheryou don’t learn everything in an apprenticeship some tricks of the trades are learned on the jobsite or through stuff like this here
@@SixDasher I dare you to tell a journeyman that just starting your apprenticeship lmao it’ll be over rover
@@izzywashington5461their comment was rash but i think they meant the EE part, not being an electrician. We learn about conductivity/resistivity in electric circuits
Don't forget to short the probes so you can subtract the internal resistance of the meter.
What about leaking over the skin through the points he's holding copper to the probes?
Preach.
@@lazertroll702negligible
@@lazertroll702electricity takes the path of less resistance, this being a resistance test with a dc voltage there is pretty much no loading effect, if the test used like a ac voltage then yes it could have an effect, but that’s entirely dependent on a scale that’s possibly not even linear!
resistance of a roll of wire vs a ohmmeter circuit board = negligible af
Nice trick bro. I appreciate it. I'm an HVAC guy so I don't do a ton of wiring but enough. I wire all my units. This will help me with my new central a.c.installs for sure. And I'm doing resistance testing all the time so thanks.. glad I found you I'm about to subscribe!
That's actually really cool
Multimeters are bad with low resistances. You get better results with continuity mode of installation tester. Basic multimeters measure resistance usually at about 1 mA, when installation testers do 200-250 mA. And installation testers have ways to zero out your test leads.
With thicker wires I have used constant current source at couple amps and measured voltage drop with multimeter to get bit more precision.
Yeah go fork out money for an installation tester go ahead
I'm not going to buy an expensive megger to find out how much wire I have left. A multimeter doesn't need to be dead accurate, just a ballpark estimate.
It seems to be an electrician problem, so my solution is for electricians. You need that installation tester to be an electrician.
And you can use that same method in troubleshooting, where the wire could be in a noisy environment, where that multimeter might give you really bad and misleading estimates.
For ballpark values of reels/rings you have your experience, eyes and feel for weight. If not, that's something you should learn as an electrician anyway.
Can always weigh it as well.
@@stringlarson1247 weight can be pretty accurate, but you need reference weights for the reel and cable type, probably for every manufacturer separately, as they use different insulation etc.
Many warehouses use weight for partly used reels and rings, as they have a lot of full reels/rings to compare for. We did a lot of quick checks on our inventory with scale that did piece calculations. It was really accurate when you could tare in something like 200m full ring of wire and set it to show 200 or 2000 and then throw the partly used ring on it.
We had a sheet of reference weights for most of our cable/wire/reel types by the scale, but now there's way less inventory management, that we didn't get a new scale when the old one released the magic smoke.
And weight won't help in troubleshooting, so it's not that good for an electrician. Nice to know how to do it if it happens to be the easiest option, but usually professional stuff has meter/feet markings on the cable anyway and sometimes even the inside ends markings are transferred to the side of a reel (or that is clearly zero).
I'm gonna need another gangster trick to show how to fish out the opposite end of the wire from inside of the roll.
the Kingdom of GOD is coming…“Silver is for the kettle, and gold for the furnace, but The LORD is the tester of hearts- Bible” your heart is like discovered silver, dirty and not pure, when silver is purified it is melted over and over, to the point that when it’s melted and glows red hot, it is pure enough to see your own reflection in the puddle, so also does the LORD purify your heart, till HE can see HIS own reflection in it, seek the LORD and be reborn, ask The LORD to renew and restore you, repent and be baptized for the forgiveness of sins, Jesus died so that our sins will be wiped away and so that we could be made new, if would be wise you would be wise for yourself, pick up your cross and deny your flesh and follow the path of GOD, for The Kingdom of GOD is at hand, in JESUS MIGHTY NAME Amen and Amen
😂 Underrated comment.
@uneedamuracle especially since I died in 2018 and the lord told me tribulation is coming. Told me to preach Jesus name in Syria Lebanon Jerusalem but I didn't go
@@samuellipscomb8173Wtf does that have to do with electrical wiring?? Gtfo
@@juanit0tackit0tackito2
Glad you Love Jesus,was he an electrician or some shit??
I believe you. It'dve taken me ages to figure that out
I don't know why but I haven't seen videos from you coming to my account in months it's got to be some algorithm nonsense but I'm glad that you showed up
Should verify your meter is actually accurate at this point and also measure the leads alone first to see the offset.
Yeah it seems like this can only give you a ballpark estimate for how much length is on the wire.
I’m pretty sure you only really want that ball park. If you know you need 100ft then you better make sure it doesn’t just read 110ft ya know.
My lineman buddy sent me your TikTok the other day, good shit Dustin
the Kingdom of GOD is coming…“Silver is for the kettle, and gold for the furnace, but The LORD is the tester of hearts- Bible” your heart is like discovered silver, dirty and not pure, when silver is purified it is melted over and over, to the point that when it’s melted and glows red hot, it is pure enough to see your own reflection in the puddle, so also does the LORD purify your heart, till HE can see HIS own reflection in it, seek the LORD and be reborn, ask The LORD to renew and restore you, repent and be baptized for the forgiveness of sins, Jesus died so that our sins will be wiped away and so that we could be made new, if would be wise you would be wise for yourself, pick up your cross and deny your flesh and follow the path of GOD, for The Kingdom of GOD is at hand, in JESUS MIGHTY NAME Amen and Amen 🙏 o
@@juanit0tackit0tackito2 but we're talking about copper . Thank you for coming out, have a good night and God bless
Doesn't the ohm resistance change due to the coiled wire as opposed to straight wire? I think so. Interesting, friend. Edit: not sure my meter is sensitive enough for this test but I'm sure not gunna unroll 500' to test it out...lol. cool.
@@christopherscott8853 wouldn't think so unless you're taking induction current
@@christopherscott8853 if it’s a coil then yes. The magnetic flux produced by a changing current in a coil induces a voltage, which changes the resistance, and it changes based on the amount of turns of wire per unit length, radius, etc. If you’re curious just do some research on Ohm’s Law and formulas for long solenoids
When he took out the chart table i was like : Daaaaammm thats gangsta!!
if i had been given access to whatever that book is id have learned more in a few days than i did in four months of electrical engineering training
Cool !! .. I think it would be close enough for truck stock, but since your doing it in the shop anyway, just use a milliohm meter with Kelvin clamps and compensate for ambient temperature. An actual wire length meter is basically the same setup with some preset wire specs onboard. These two methods are more expensive, but extremely accurate for checking warehouse stock. 👍
"We're been living most our lives wiring up a gangsta's paradise."
Most gangster shit is running a backfeed while grilling during a hurricane gloating to your neighbors.😎
I’ve learn something today thanks
I mostly spend 50% of my time troubleshooting shorts to ground on Fire Alarm Cable. I have a whole scenario of distances in my head like 0.6 Ohms to ground equals around 50'-100' away on 16 awg.
Get a jdsu 3000
He should have first put both test leads together and push the REL button to remove their resistance which normally is 0.2-0.3(Ohm).
How much error by touching the probes with your thumbs?
Nobody:
Absolutely nobody:
Physics school teacher: gangsta
I learned this from making kanthal resistance coils! Great tip to keep in mind.
I'm pretty sure the "most gangster way" to tell how much wire you have, would be walking into a hardware store, pulling an entire new reel of wire, and walking out with it. You know exactly how much you have. Now you just gotta bug out before the cops arrive.
😂
Congrats at making the jump. However, your landing is shit.
Works, but I wouldn't trust the multimeter's accuracy too much for that low resistance values. Tip: to measure really low resistance fairly precise, hook up a lab power supply to the cable and set it to a constant current (not voltage) of 1 amp. The voltage reading you get equals your resistance.
Exactly. That's a variant of the 4-wire Kelvin resistance measuring technique. For low resistances, the advice in the video is virtually useless.
Wanted to point that out, but saw this comment. As well as bro assuming his wires are made of pure copper...
That’s pretty darn awesome. I know there are a lot of variables, but it could have multiple applications especially if using a tracer.
NOT EXACTLY, R is a function of Temperature, at room temperature you may get that reading, but as soon as E is applied, I goes up, THATS WHY THAT TABLE SAYS AT 75 degrees CELSIUS, you're sitting there at room temp which is only 21 degrees C. put that T90 through EMT with 600V applied and watch the R go up. LEARN THE AMPACITY of a conductor, that gives you the true value. not this gibberish.
When you clasp the the ends of the meter leads like that, you're creating a parallel path through your body and getting a lower resistance reading than if you were just measuring the wire by itself.
Which is why it "bounces around a bit" because the human body is made of lots of salty liquid, which is conductive, (some call it blood) and so we make really good capacitors. If his fingers were sweaty it would be even worse.
@@richardwickens2923 True dat.
But I think the "bouncing around a bit" he referred to was between 0.9 and 1 ohm, which is normal for a digital meter because the circuit works by comparing the signal voltage to a voltage produced through it's own voltage divider, which is in discrete steps. Thus, if the signal voltage is greater than 0.9 but less than 1 ohm, the voltage divider will hunt back and forth between those two steps.
That trick is irresistable.
I was taught this in the first week of my training, this is a basic part of electrical testing in the UK
Pretty cool. Don't forget touching the ends of the probes with both hands will alter the final reading.
depending on the tester, you may get a different reading in the ohms and in the continuity mode
Make sure that you're not touching at least one l lead on your meter, or you'll be measuring your body's resistance in parallel to the wire spool. Won't change much, but you're measuring a small resistance value. Good tip, though.
Please do the calculation: Suppose the wire resistance is even 10 ohms, and your body resistance as low as 10k (very unlikely), how much difference in length estimate will that make?
This is mighty complicated math for most of the electricians I've known.
No way. No more trying to find if there are feet markings. Or manually counting every foot mark. Thank you! Too cool.