Calculating Voltage Drop

#AccessToPower #AccessElectric
In this episode of AccessToPower we will discuss how to calculate voltage drop in a circuit using the Tables in Chapter 9 of the National Electrical Code (NEC). We go over how to use Table 8 to calculate the "K" or the constant value of copper and aluminum. We show you how to use the "K" Value to calculate the voltage drop of a circuit using nothing but Table 8 in the NEC. We then look at my preferred method which uses Table 9 in Chapter 9 of the NEC to calculate voltage drop using the "Z" or Impedance values of Copper and Aluminum conductors given for each size in various kinds of Conduit.

[Jayson]

There is so much garbage out there, I'm really happy to find someone who is clear, easy to understand and stays focused on the question at hand. Thanks and keep on doing what you're doing!

[mandingos]

Thank you for putting these videos together! For someone getting underway in the trade I find these videos very helpful. Shout out to the 209 too!

[KevinCoop]

As a designer for a contractor and doing thousands of calculations over the years, I always wanted to know the wire size needed in one calculation. I did not want to keep guessing until I got less than 3%. Less complicated method. 2xKxampsxLdivided by 3% of voltage= cm. Conductor properties table will give you needed wire size. Also, for balanced 3 phase 3 wire multiply single phase calculation at end by .86. 1.73/2=.865. And for balanced three phase 4 wire, multiply single phase calc at end times .5. If balanced load, then no neutral current. 1/2=.5.
Respectfully submitted, Kevin

[jeremiahwoodhull]

Thank you for your time in making this video. It is easy to follow along and understand. Especially on impedance. Once again thank you.

[energyexecs]

...Nice learning video. I also like using Z (the impedance) because it provides a glimpse for the human that impedance plays an important role in voltage delivery to the end point.

[ethanbrewer]

Thank you for this video! It helped me a lot in understanding and feeling confident in my calculations.

[bcv]

Another good informational video👍
Your doing such a good job for those who want to learn more and improve.

[frankvieira]

I think you're Portuguese, but I love you're videos. Thank You.

[georgegenteroni]

Thank you for the clear discussion abou voltage drop.

[azscib]

That was such a WELL done video. So clear and precise! great job. Others should follow as some ramble through their videos. Again ~ thank you!!!!

[davidjackson]

Thanks for your help in solving voltage drop calculation.

[ernestocortez]

Thank you! Im getting ready to take my state test here in CA this Saturday. I'm ready for a voltage drop question.

[crisrobersonsantos]

Thank you very much for the very clear, detailed and straight forward video lesson. This helps me a lot on my studies.

NEC Table 9 have a title of:
Alternating-Current Resistance and Reactance for 600-Volt Cables, "3-Phase", 60 Hz, 75C (167F) — Three Single Conductors in Conduit

May I kindly consult if we can use NEC Table 9 for 1-Phase circuits?
even though the title indicates "3-Phase"

Thanks again and more power to your channel.

[yasirjohny]

Thanks A lot, your method of teach is very unique I completely understand of VD calculations. 🌹🌹🌹

[Buhzuka]

Super Helpful! Good Informational video!!

[bojitti]

Thanks a lot. I find this very useful.

[ankitpanchal]

Great video. But can we use Vd = 2*L*R*I / 1000 formula?

[tedecacao]

Thank you so much for this video! Subscribing now

[rickydags]

Thank you for this video. Question for you about the impedance for the single phase case. The Chapter 9 Table 9 of the NEC says in the title that it is for three phase power, but you used it in the single phase case. Is there something in the NEC that indicated that table 9 can be used on the single phase case or is there another table for the single phase case?

[pululunguente]

And what about you having 2 sets of conductors with Z method? Please Help!!