Electrical Calculations the easiest way to Calculate Voltage Drop

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[@AmericanWireman]

Found your videos when I was an apprentice, I didnt know much about the code, but you had me doing well in class, better than all my peers, and now I am a journeyman and I've been thinking about starting my own company, and here I am brushing up on code calcs, preparing myself to sign up for the masters test, your awesome bro

[@leroyfacundo]

Great video! I needed a little bit of a refresher! At school they taught me a cool saying to remember it! “2 kill a crazy man “ 2KIL/ acm (2= single phase constant multiplayer) (K= Kfactor) (I= current) (L= length of wire run) (Acm= area of circular mills)

[@lightwishatnight]

Using iiiiit! 🎶

[@jerricksandoval5786]

So easy and simple the way you explain it. I got it! Thank you.

[@ElectricalCodeCoach]

You are very welcome! Welcome to the community!

[@David-vn4ox]

Just went over my notes and One of them was to rewatch this Video ✊🏽💯🙏🏽⚡️

[@ElectricalCodeCoach]

Let's go!

[@hoatland2b]

i am so glad to have come across this, I will be watching all your videos now 25 years in the business I've forgotten more than i know LOL

[@ElectricalCodeCoach]

LOL that's awesome brother! Your knowledge and input will be well received!

[@zhumusic-ng9tr]

Quickest understanding ever and help in the book is nice.

[@ElectricalCodeCoach]

I'm glad this helps. Thank you for your feedback. Lets get to it!

[@ericparker415]

Hey, thanks for laying this out step by step.

[@ElectricalCodeCoach]

Let's go!!

[@bigjesskennelz]

I'm loving this channel!!!

[@ElectricalCodeCoach]

Appreciate it bro! Let's keep grinding!

[@pogiburat9597]

From #6 copper came up to #1 copper for acceptable VD. Thank you Coach!!!!

[@hyeongjeong8002]

You are my mentor Thank you

[@zachwhite7079]

This is awesome so thankful

[@yuyisimos]

Great video.

[@ElectricalCodeCoach]

Thank you brother!

[@kuryentelektrik]

Nice explanation, I'm using the same formula.

[@Lucio..]

Wow awesome explanation.god bless you code coach!

[@LarryABN918]

great video!

[@sparten4life420]

Thx for the knowledge!

[@jermainerivera8709]

I'm actually studying on mike holys program and have my unlimited in dec. A few of your videos are so much fun and easily more explained. Can you message me for private tutor on the calculations portions .

[@ElectricalCodeCoach]

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[@K1ZEK]

That was interesting and a GREAT explanation. You know it is a shame kids in school today will not stand a chance to learn simple algebra. It is not WOKE! Thanks again. Leo

[@AmericanWireman]

I would like to buy you dinner one day my guy, you've really helped me ALOT

[@ElectricalCodeCoach]

lol brother i love to help yall! There are a couple of ways people can give back want to! You can "Pay it Forward" Or "Treat the Team" Thanks!! electricalcodecoach.com/shop/ols/categories/pay-it-forward

[@2HEARTSBREAK]

Thanks. #electricalcodecoach

[@nicholashall9]

Awesome! Thank you!

[@ElectricalCodeCoach]

You're welcome!

[@andypridmore2435]

Thank you for helping me with this! Roughly how much voltage drop would it take for a circuit to have problems?

[@ElectricalCodeCoach]

Great question!! NEC recommends no more than 3% for branch circuits and no more than 5% for the system but this is a recommendation not a code.

[@tonygorton1874]

This is so clutch!

[@rg8110]

good morning Coach....

[@ElectricalCodeCoach]

Morning bro!

[@blaquemark83]

Great info

[@gothmedia2509]

thx

[@ElectricalCodeCoach]

Anytime brother!

[@ryanvelez6367]

Awesome video! Is voltage usually included in the license test?

[@ElectricalCodeCoach]

Yep!

[@OySkater1]

What scenario would involve you using the three phase values? Would this simply be when you are working out of a three phase panel? Thanks

[@peterkavan8368]

Scotty answered my question

[@ricksurette7985]

Coach-- This is a great video. I do have one question-- maybe I am thinking too much about VD. If you are running a circuit from an electrical panel to a thermostat for electric baseboard heat and you have 3 (separate 1500 watt electric baseboards) -- home runs from the Thermostat of 40 feet each. In this example, since you have a parallel circuit (from the thermostat to each baseboard), would the VD distance be from the electrical panel to the thermostat to one of the baseboard runs? So your distance to determine VD would be 40 feet and not the 120 feet for the total of all 3 runs. Thank you.

[@ElectricalCodeCoach]

You're still going to have a total cumulative voltage drop, but none of these values are going to affect anything.

[@CutinChai]

Is it coated or uncoated? Which one do we use

[@ElectricalCodeCoach]

If you're using that third column over for circular mils they're going to be the same

[@andypridmore2435]

Had a boss tell me that VD is to the first point of connection then you can go back to the original size thats required for that breaker but he then told me that they would put a troff above the panel a few feet and upsize there wire only to that troff then go the remaining distance with smaller wire no matter what the distance was and that kind of seemed wrong to me?

[@ElectricalCodeCoach]

If I'm understanding you correctly. Voltage drop is voltage drop, regardless of where it is in the system.

[@srlandreneau]

Just to be clear.... we are looking for a Voltage Drop of 12 or less because 240 volt system times 5% equals 12?? Or are you doing it all at 240 volt system at 3% which is 7.2 Voltage Drop or less? You did state that 5% was for the whole system. I just want to be certain! Thanks

[@ElectricalCodeCoach]

Great question! Yep we are still looking to keep the 5% and 3% respectively. If you encountered a value outside of that when actually sizing wire, you would up size it up until you it was sufficient! Welcome to the community*!! kzbin.info/door/Gx2kgwV88KGMhP5Yr5NnCAcommunity

[@longshankdrills8799]

When calculating voltage drop how are you supposed to do it when you go to table 8 in the 2020 code book, and once you get larger than 4/0 in the area column for circular Mills the numbers for calculations stop, they're blank. You need those numbers in order to calculate the proper voltage drop. Such as for aluminum. 2 × 21.2 (for aluminum) × Amps × Distance "=" Then divide (÷) by the number in your "area circular Mills column table 8", to get your total voltage drop ? So two questions why do the numbers stop in that column when you get larger than 4/0, and how do you calculate without those numbers to utilize ????

[@ElectricalCodeCoach]

Great question 250 kcmil = 250,000 cmil 300 kcmil = 300,000 cmil Ect..

[@ElectricalCodeCoach]

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[@adl9705]

when i use online calculators i get a different value, off by about 3%. do you know why the result change even if i put all the correct info? thank you!

[@ElectricalCodeCoach]

Push equals in between each number

[@adl9705]

@@ElectricalCodeCoach I thought the result was the voltage drop percentage. I forgot to still divide by the voltage and multiply by 100 to get the percentage. My bad! Thanks for the video!

[@peterkavan8368]

What value is used for solar voltage 600v DC? The 2 value would change,

[@damoncarfagna6559]

What is the minimum size 4wire aluminum underground conductors you could run for feeding a 120/240v 100 amp sub panel with a distance of 370 ft with less than 5% VDrop

[@mikeadler434]

👍👍

[@michaelwas8549]

why is their a cutoff on the cir.mils when you reach 250 mcm

[@ElectricalCodeCoach]

Great question!! Because it naturally turns in to the cmils, example , 250 = 250,000

[@510purple]

so you are allowed to install if voltage drop is no more than 3% of 120v?

[@ElectricalCodeCoach]

It's a recommendation

[@danielbatista8760]

how did you get 12.9 for copper? When I do the math I get 12.8 for stranded and for solid 12.6

[@ElectricalCodeCoach]

Hey brother great question!. For NEC tests you will use just the DC resistance for for a 1,000 kcm conductor that is 1,000 long at 75°C which is aprox 12.9 for copper and 21.20 for aluminum, and not the individual values in table 8. great eye and great question!!

[@paulnovak6977]

Are these numbers (12.9) (21.2) in code book or do I have to memorize them?

[@lorus511]

I noticed you are mixing imperial measurement with metric. Surely that can't be good?

[@ElectricalCodeCoach]

Yeah man! Lol for some reason that's just the way it's done for electrical voltage drop!! And it's funny, they do it a lot in the NEC. Great question!