18th EDITION AMENDMENT 2 - VOLTAGE DROP CALCULATIONS - EXAM QUESTIONS - FINDING ANSWERS
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- čas přidán 18. 06. 2022
- This video is part of a series of help videos on Amendment 2 of the 18th Edition of the Wiring Regulations It will help you to study for the exam and improve your chances of passing by showing you how to use the book, how to read the question and how to extract the key information from it. We want you to avoid randomly flicking through the book in the hope that the answer will suddenly appear.
And if you have already passed the exam but are a little rusty, then they will help you to brush up on your knowledge and maybe even give you some new learning.
Voltage drop is always a popular choice for an exam question, and most of you will have a couple of calculation questions in the exam.
Knowing how to find the answer to voltage drop questions is quickly understood and can be another easy mark for you.
To view all of our videos type in LearnElectrics all one word into the CZcams search bar.
This is video No.149 on our CZcams channel where we have videos on a wide range of electrical topics.
Exactly what I needed for my upcoming exams. I've told the rest of the class too. We might as well all learn from the channel.
Thanks for the positive feedback, really appreciated. Dave.
Thanks for pointing me to THIS video Dave! I know that volt drop formula off by heart now! I found this video very helpful indeed also for knowing WHICH TABLE to look at for calculating voltage drops in circuits regarding 70 degrees Celsius flat twin and earth cable. (Quickest way to find this table (4D5) is to look it up in the TABLE OF TABLES section in the brown book (after going there from the Contents page on page 3 of the book). Thanks again for this! Your CZcams channel and your website is an absolutely superb resource for quckly and easily being able ot learn how to become a much better and more knowledgeable professional electrician.
Glad it was helpful Gary and your comments are appreciated. The next video is also about volts drop and R1+R2 calculations, which you might enjoy.
Hi Dave!
You are brilliant at explaining everything in such great simple detail!
Excellent!
Regards mg.
Glad you liked it Malachy, really appreciated comments.
Hey chap, your videos are top notch! I am currently studying with a training provider that shall remain nameless and i wish i had found you first. your style is succinct and extremely well laid out, it makes learning so efficient. thanks so much
Thanks for the really great support, appreciated. If my videos help you to get more out of your course, that is great. Good luck and keep learning, it's a good trade to be in.
Thanks to dave videos. They made my exam super easy 😀 thank you
Great to know, thankyou.
Q2 you put 60 instead of 40 for cable length
Thanks for spotting that, I've corrected it. It should be 40 metres. I can't even think of an excuse why that happened, but thanks. Dave.
@@learnelectrics4402 Loving the videos, but it still has 60 rather than 40 in the populated equation.
@@learnelectrics4402p😊
Excellent video thank you
Thanks Azizur, thanks for watching. Dave.
hello I've come across your videos as I'm training to be a spark can you please tell me how you come to find the top number in the voltage drop formula please
The number 44 is the reference number for 1mm copper conductor. It will drop 44mV per amp per metre. This is found in the voltage drop data for the copper conductors in the Wiring Regs book, Appx 4.
Question 2 states 40m length of cable but your calculation shows 60m.
Just checked the video and no, it is calculated for 40 metres. Your answer should be 7.2 volts as per the slide. Hope this helps and thanks for watching. Dave.
Wrong value in the equation. You've put 60 instead of 40. On the the plus side, its helped me remember the formula. So, not sure if you did it on purpose, lol.
Thanks for the input, appreciated.
Dave.