One-Family Optional Service Calculation - Crash Course 2020
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- Опубликовано: 20 окт 2024
- This video shows a quick, simple approach to an electrical service calculation, along with multiple examples. The use of a handy table format makes it easy to understand and implement into real-world applications, and likewise is very useful for study and exam prep.
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Electrical, NEC, Exam, Test, Load, 2020, Table, Feeder, Master, Journeyman, Apprentice, Electrician, Calc, Calculation, Service
Excelente video!!!!
Thank you! Glad you found it helpful.
What does it mean the 100A or greater on 220
82(A)?
Your service or feeder conductors must have a 100A capacity or more in order for you to be able to use the optional method in your calculation. If they are less, you must use the standard method (Part III of Article 220).
Im hoping to download your calculation tables to help work through them. Is that possible?
Unfortunately, I'm still developing my website. At the moment, the best way to get the tables is to screenshot and print the black and white copy that I put at the end of each Deep Dive video.
Eventually, I'll have the tables made into fillable spreadsheets. That way you can just input the data and it'll auto calculate. Sorry for the wait!
IN EX #1 AFTER APPLYING LOAD FACTOR WHICH IS 65% YOU SHALL COMPARE THE RESULT WITH 7200 WAT HEAT PUMP THE LARGEST ONE IS 7200 WATT INSTEAD OF 7200 WAT .REF:220.82.C.1-6 THANKS
Good catch! You're right. We need to take the largest load of the options provided in 220.82(C). And in this particular case, that would mean taking the heat pump at full value (7200VA vs 7150VA [11,000 x 65%]). This gives us a total of 26,360VA for the dwelling. Our total amps does not change with such a small revision and remains 110.
Thanks for pointing that out! I will make a note in the video pronto.
Why aren’t you adding in 125% of largest motor?
Since this is the Optional Method, almost everything is taken at nameplate value. Check out this video for a thorough explanation of the Optional Method.
ruclips.net/video/pjSYPcfyKx0/видео.html