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ON-SITE GUIDE - APPENDIX F - PART 2 - VOLTAGE DROP - HOW TO CALCULATE IT - HOW TO SELECT CABLES

LEARN ELECTRICS
2023 ж. 25 Там.
5 373 Рет қаралды
Жүктеу

This is part 2 of our look at Appendix F of the On-Site Guide or OSG.
This is an often under-used Appendix, but it is so full of very useful information.
We are working to Amendment 2 of the Wiring Regulations, the brown book and all page numbers in this LearnElectrics video refer to the brown Amendment 2 On-Site Guide. The on-site guide follows the Wiring Regulations book BS7671 2018 Amendment 2.
Over time, we’ve had lots of questions about voltage drop …
What is voltage drop for instance …
Where do we start with the formula, and can we have some examples to help us to understand?
How does the formula work? How does it affect the circuit?
And even … Why does it matter about voltage drop? A cable is just a cable … isn’t it?
We will use a basic cooker circuit to show you how we get voltage drop and its effects on the circuit.
There are worked examples for you to follow along with, all fully explained with lots of detail.
We look at the standard formula and at a valuable re-arrangement that you can use in your work.
Some of our very observant viewers have noticed a typo and brought this to my attention, for which I am truly grateful. On a couple of charts I have the Ohm’s law formula for current as I = V ÷ I which cannot be. This should be I = V ÷ R
Ohm’s Law, as a reminder then …
V = I x R
I = V ÷ R
R = V ÷ I
And Power Law
P = V x I
V = P ÷ I
I = P ÷ V
This is video number 215 and to view all our videos type in LearnElectrics all one word into the KZhead search bar.
Visit our KZhead channel where we have many more videos on a wide range of electrical topics.

Пікірлер

  • Another great video David clearly explained, you make them so easy to follow and understand.Always look forward to the next one

    @johnshiels842@johnshiels8428 ай бұрын

    • Thank you, great comments and thanks for watching.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • perfect explanation , thank you

    @AhmedMohammadali-pn3ud@AhmedMohammadali-pn3ud16 күн бұрын

    • Thanks for watching. Dave.

      @learnelectrics4402@learnelectrics44029 күн бұрын

  • Thank you so much for good explaning

    @halilyasaval4202@halilyasaval42023 ай бұрын

    • You are welcome, glad it was useful. Dave.

      @learnelectrics4402@learnelectrics44023 ай бұрын

  • Spot on Dave, excellent keep it up I really appreciate you sharing your knowledge.

    @anthonyfindlay466@anthonyfindlay4668 ай бұрын

    • Thanks, will do, appreciated.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • 👌excellent, very detailed

    @brianhewitt8618@brianhewitt86188 ай бұрын

    • Glad you liked it Brian. thanks for watching.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • Great video. thank you.

    @dannysmith2408@dannysmith24088 ай бұрын

    • Glad you liked it and thanks for the support, appreciated.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • Shared 👍

    @Oufg103f@Oufg103f4 ай бұрын

    • Thank you Chris, much appreciated.

      @learnelectrics4402@learnelectrics44024 ай бұрын

  • Thanks ...

    @franciscogago5961@franciscogago59617 ай бұрын

    • You're welcome, thanks.

      @learnelectrics4402@learnelectrics44027 ай бұрын

  • Thanks for the video. Very clear as usual (small typo in table though - I= V /I - instead of I=V/R)

    @no_short_circuit@no_short_circuit8 ай бұрын

    • Yep, it seems that everyone spotted that. Corrected on that and repeated slides. Glad someone is checking for me, really appreciated, it helps, Dave,

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • Correction Davo. At 4.17. I = V/R. As you know

    @highgatehandyman6479@highgatehandyman64798 ай бұрын

    • Wow, that's some super typo. Thanks for that, corrected on that and other slides. Hopefully folk will see through it. That's what I love about you guys, you never let me get away with anything - it keeps me on my toes. Thanks again, really appreciated, Dave.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • If you don't understand voltage drop from this video, don't worry, plumbing is still waiting for you!🤣😂😇

    @berkotropia@berkotropia4 ай бұрын

    • Thanks for watching, appreciated. Dave.

      @learnelectrics4402@learnelectrics44024 ай бұрын

  • Hi Dave ,Thank you for clear easy instructions.Dave just to let you know I think there is a typing error in your two initial tables. We see I=V÷I instead of I=V÷R..YOUR LECTURES ARE FANTASTIC.

    @vachikyadegarian1403@vachikyadegarian14038 ай бұрын

    • Yes, my typo. Everyone seems to have spotted that except me. Thanks for the feedback, it is appreciated, Dave.

      @learnelectrics4402@learnelectrics44028 ай бұрын
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