Transformer Conductor Sizing
Here we are sizing the conductors supplying a transformer. We will cover Primary and Secondary conductors for both individual transformers and a bank of multiple transformers.
The code rules and tables we references here are 26-256 and Table 2. Also important to note 4-004 and 4-006. We are using the 2018 CEC.
Don't forget to check out these other transformers calculations videos:
Transformer Overcurrent Arrangement: • Transformer Overcurren...
Transformer Overcurrent Sizing, Over 750V, Primary: • Transformer Overcurren...
Transformer Overcurrent Sizing, Over 750V, Primary and Secondary: • Transformer Overcurren...
Transformer Overcurrent Sizing, 750V or Less, Other than Dry Type: • Transformer Overcurren...
Transformer Overcurrent Sizing, 750V or Less, Dry Type: • Transformer Overcurren...
Introduction: (0:00)
Single Transformer: (1:00)
Transformer Bank: (4:50)
This video is intended for educational purposes and should not be used as an installation guide. Consult your local safety code requirements and a qualified electrician.
Пікірлер: 21
Thank you. Made it incredibly easy to understand.
This video is a big help understand me the concept. THANKS for sharing.
I really like your style of teaching thanks.
Hi Zack!, I really appreciate for your training videos. I read a lot of Canadian standard codes, but your videos are very very specific and now I find out how to do the sizing calculation for the O/C, cables, etc.. I wish you all the best luck :)
@ZackHartle
2 жыл бұрын
Glad you like them!
Thank you for your time 👍
@ZackHartle
2 жыл бұрын
No problem 👍 Thanks for watching!
Hi Zack! In the field you often hear that we are "choking this transformer". I was hoping you may have some insight as per the code book as to how this is done? Loved your lectures, these videos are great as well. Thank you!
Hi Zack! , Where does the 1,25 come from? Can we apply this rule to all circuits when it comes to calculating conductor size? e.g while calculating conductor size for a diesel generator or any loads on the distribution panel
Hi Zack 1.25 is minimum demand for cable. actual size of conductor depend on protection method. For example if there is high voltage (over 750V) transformer the minimum size of fuse will be 150% then if we select a cable according to 125% primary current there will be a big gap between fuse rating and cable ampacity and as section 14 over current protection can not be larger than cable ampacity, in this case we can not consider 125% demand factor for conductor and need to jump to 150% for sizing conductor. If protection is by breaker (300%) cable size should be sized accordingly. please correct me if i am wrong
No TTR is given. Do we use the 75 degree column in Table.2 based on the insulation being 90? Cheers Zack.
How come I can't find any info on neon light transformers which I am working on?
If you use a calculator don't forget the parentheses. 20000÷(600 x ✔️(3)=19.24
does this example apply here in the United States?
@ZackHartle
2 жыл бұрын
I don't know how the NEC would solve this. Sorry!
I was sooooo thrown off! I couldn't believe what I saw in this video, and was getting ready to expose this guy for fraud and misinformation! THEN I realized it is not the USA electrical code! 😂 I like the Canadian code better, it's more simple. 👍
Great video. CEC says 25%! Not 125% of highest primary current plus the sum of other primary current for transformers in parallel unless my book has a typo really hope that is not the case😬
@sajnt69
Жыл бұрын
125% is 1 plus 25% you must include the largest in your sum.
@mixedwithfun4495
Жыл бұрын
@@sajnt69 thank you. Reread the code again and totally makes sense based on your explanation 🙏🏿
is this guy actually writing backwards on glass rn? tf lol
@TheCompton1963
22 күн бұрын
😂😂😂😂😂😂 🧑🏻🏫