MORE MAGIC NUMBERS FOR ELECTRICIANS - 35 AND 44 - HOW TO USE SHORTCUTS TO FIND ZS - AND MUCH MORE
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- Опубликовано: 8 сен 2023
- Several years ago we made a short video called “35 THE MAGIC NUMBER” and it’s now time to improve on that and also to add a second magic number.
These numbers will help you to calculate Voltage Drop and Loop Impedance or Zs without the need to refer to tables and are quick and accurate.
There are always frequent questions on this, so it obviously matters to many of us.
Questions like … I’ve heard that 35 is a magic number, magic for what?
Or very recently … I’ve been told that the number 35 can be used to find Zs, how does that work?
Then we had … Can we have more detail about how the Zs numbers are actually worked out
And 44 is also a magic number that I, personally, use quite frequently.
The video will explain where the numbers come from, how we actually calculate Zs for example so that you better understand the short-cut. So you can appreciate why the magic numbers work as they do.
This is video number 217 and to view all our videos type in LearnElectrics all one word into the RUclips search bar.
Visit our RUclips channel where we have many more videos on a wide range of electrical topics.
If only all presentations were as clear and concise as this ! Thank you
What a great reply, thank you. Dave.
Dave, the experience and preparation in your presentations are so refreshing. Thank you.
Glad you like them and thanks for the comments, much appreciated. Dave.
That is a very simple but so valuable piece of information. These numbers are clocked in my head . Thank you
Glad it was helpful and thanks for watching. Dave.
That's a great lesson, Professor Dave. It was like being in a lecture room. Continue your good job online. 👍😍🌹
I'll try my best and thanks for watching, appreciated.
Dave you are a star, and I wish you were my teacher when a was in college. keep up the good work .....!!!!
Thanks for the great comments, its all about making sure the student understands. Good luck, its a great trade to be in. Dave.
Thanks for sharing your knowledge, its certainly helped my confidence with the formulas for next week.
Glad they are useful. Thanks for watching. Dave.
Definitely worth digesting this, Excellent stuff Dave👌
Thank you Brian, your support is always appreciated, Dave.
Outstandingly helpful!! I'm dyslexic so don't learn very well from books or some lecturers. You explain things very well indeed!! John Ward was my Go-to channel for electrical theory - but I think you now are! I did a formal 3 year apprentiship 20 years ago but have got a bit rusty on some theory since!
Thank you Nick. There are lots of good channels out there, as long as you are learning that is what matters. Its just a case of finding a style that suits you and sticking with it. If the videos help, great, they have done their job. Dave.
Simply amazing, always the best info,
Glad you think so, thank you.
Excellent presentation again Dave. I don’t know if you have any more of these “magic number” videos in the pipeline, but there are more magic numbers for instance, for 80% Zs values for BS60898 MCB’s (type B=35)(type C=17)(typeD=8.75)
For80% Zs values for BS3871 MCB’s (type1=43.7)(type2=25)(type3=17.5)(type4=3.5)
Great work Dave👏👍👍
Thanks for the support. Appreciated. Dave.
This is really useful , you are never too old to learn !! many thanks
Glad you think so, every day is a school day. Thanks for the comments and thanks for watching. Dave.
Very useful. Thanks
Glad it was helpful and thanks for watching.
Excellent presentation Dave
Glad you enjoyed it David, thanks again for your support.
Thinks dave for a great job
Thank you to you Mohammed. Great feedback. Dave.
Excellent content
Thank you. Appreciated.
Great video again
Glad you enjoyed it and thanks for the support, appreciated.
Very interesting thanks
Glad you enjoyed it, thanks for the support. Dave.
It was magic, indeed
Lots more to come. Thanks for watching.
Hi dave, could you make a video on star and delta connections inside of a transformer if u already haven't.
Specifically on the transformer - no - but its now on the list
Meanwhile take a look at these two videos on single and three phase electricity, they do cover some of it.
Thanks for watching. Dave
ruclips.net/video/MqQwOQwl5B8/видео.html
ruclips.net/video/EEG3sNeg35A/видео.html
❤😎😎💪🏽
Hello Dave,, many thanks for all the knowledge you are giving us, I'm thinking of buying this book,, IET On-Site Guide BS7671:2018+A2:2022 by The Institution of Engineering - Book,,, will benefit from taking into consideration that i work in the middle-east, or you recommend other book ?? Many thanks in advance.
In the UK it is an essential purchase. All my videos use this book as a reference source. Not sure how closely it relates to the Middle East, but when I worked in France I used the UK book as a reference and my work was always accepted. A few differences that I had to work around. Good luck my friend. Dave.
@@learnelectrics4402 many thanks 🙏🙏🙏