Multifamily Standard Service Calculation - Crash Course
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- Опубликовано: 19 мар 2023
- 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.
See my channel for more videos:
/ @simply.electrical
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howtofixit.net/electrical-loa...
Electrical NEC Exam Test Load 2020 Table Feeder Master Journeyman Apprentice Electrician, Calc, Calculation, Service
you are the best.Very strange you have so few views and subscribers .thank you for the help
Thanks for the kind words Nicolae! Hard to get the word out about a new channel.
great video thank you for sharing
Thanks for watching!
In example #3 It listed the micro/hood at 1800w but you put in 1400w in the table when you did the calculation.
Yep, I used the same template as the other calc and forgot to change the value in the problem description. My bad. I added a caption to the video at that point for now. I'll be making a new video soon. Thanks for pointing that out!
Thanks for making the video. It is helping me alot
@@raymondmolander8590 Glad you found it helpful!
thank you for your videos, If you look at your question with 20 units with 923 sqft for the watts on the micro wave in the question it says 1800w. why do you have 1400w in your calculation?
min 15
Thank you for pointing that out! The 1800w was a simple carry-over from another example when I was writing this up. I use the same format for each example problem and I apparently missed a data point when deleting the previous example. The calculation is done according to the 1400w value. Sorry for the mistake! I'll make a note in the video. Great catch!
Hi, I always thought the multiple dwelling units are hard to calculate the total building load. Now, when I watched your video makes it EASY to calculate. THANK YOU THANK YOU THANK YOU!!! Just wondering what's software/program you used to make that table for four columns? Just need the name of it or the website, please. I am a new journeyman EL01.
You're welcome! I'm glad it's been helpful for you. I just used MS Powerpoint for the table.
Thanks for the great video! Where might I be able to purchase that excel calculator you're using?
Thanks, JDM. These were not produced in Excel, rather PowerPoint. I plan to create Excel fillable sheets for each calc in the future, as I have time. Unfortunately, I don't know how soon that will be. Sorry!
Thank you Sir
You're welcome!
can you make some duplex loud calculation
You must use the standard method for a duplex --- BUT --- 220.85 allows you to calculate it under the optional method AS A TRIPLEX and take the lesser of the two totals. I'll put together a duplex video soon.
Here are my Multifamily videos:
Multifamily Optional Crash Course - ruclips.net/video/zRKbEu2zNWM/видео.html
Multifamily Optional Deep Dive - ruclips.net/video/CzIiZwBkNNU/видео.html
Multifamily Standard Crash Course - ruclips.net/video/0Ryf2QlmO-k/видео.html
Multifamily Standard Deep Dive - ruclips.net/video/laZ4THu15Hs/видео.html
Let me know if you have any questions. And thanks for checking out my channel!
James
Here it is! Duplex Standard Calc: ruclips.net/video/9kiYYCs3m5Q/видео.html
Please upload these on a drive link 🙏🏻
I'm working to get them posted on a site. Hoping to have them up in a couple of weeks. Too many irons in the fire. Sorry for the wait!
we don't increase the largest motor in the optional method correct?
Sorry for the delay! I was away for a bit.
That's correct, the optional method does not require the extra 25% for largest motor.
House load video?
House loads are typically figured under the commercial calc and then added to the total. I haven't made a video for it yet for a few reasons:
1. There are so many varieties of house load arrangements, it would be nearly impossible to cover all of the types. Different jurisdictions may treat them differently since they are not explicitly covered in the NEC.
2. The commercial calc is very straight-forward and it is easy to plug the loads in as if it was a commercial building.
3. I'm in the middle of producing my 2023 series and am spending my time on those. I would like to do a house load video eventually but it is lower priority at the moment.
75% demand factor only applies if it is 4 or more appliances???
That's correct. See 220.53. And this only applies to dwelling units.
Will you please provide these excel sheets🙏🏻🙏🏻
I'll post them on a site as soon as I can as static worksheets. They won't be Excel at first. That will take more time to produce. Sorry for the wait!
On ranges colum c is less 25kva
Nice catch! Example #1. This is a great example of a rare occasion where Column B is not always going to have a smaller value than Column C. Thanks for pointing that out. I'll make a note in the video. On a test, this could make a difference. In the real world, the difference is negligible and either way is legitimate.
i thought for ranges you use whats less, column c shows 25 kw so instead of punching 27000 should of been 25kw
Yes! Good catch. That's why I put the note at the bottom of the video during that section, explaining the difference. Another viewer had brought that to my attention but I haven't had time to remake the video. 😞
220.53
Yep, and don't forget the four exceptions listed.
Is it because it’s multi family that you say that there is more than 3?
Seems like it only 3 not 4 per unit
@@ericpolk9004 Remember that this is a service calculation. So because there are more than 4 appliances on the service, they can be taken at 75%.
Now, if it was just one unit on the service (in other words, a one-family dwelling), then they would be taken at 100%.
Glad you asked the question. I think that one confuses a lot of folks.
how are you getting 117,000 ?
Hey Eric, which example and column are you referring to? I'd be happy to explain my process. Thanks!
@@simply.electrical figured it out thank you so very much