VOLTAGE DROP CALCULATIONS IN 3 PHASE INSTALLATIONS AND SINGLE PHASE CIRCUITS FROM A 3 PHASE SUPPLY

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  • Опубликовано: 30 окт 2024

Комментарии • 60

  • @sebastiannosurname3669
    @sebastiannosurname3669 Год назад

    This is probably the best electrical RUclips channel.

    • @learnelectrics4402
      @learnelectrics4402  Год назад

      Nice of you to say so, your comments are really appreciated. Thank you. Dave.

  • @mikegmarshall
    @mikegmarshall Год назад +3

    Love the way you explain things - keep em coming !

  • @shawnshawn911
    @shawnshawn911 2 месяца назад

    You made a comprehensive concept really simple.
    Thanks for this vid

    • @learnelectrics4402
      @learnelectrics4402  2 месяца назад

      Thank you, great feedback and really appreciated, Dave.

  • @rajanvarghese2352
    @rajanvarghese2352 Год назад +1

    Dave, thanks for the lucid and detailed examples. I was actually looking forward to calculations for 3 phase supply. Best wishes.

  • @sn2319
    @sn2319 Год назад +1

    Well done, However I was calculating the Vd on single and then spotted as other people also spotted the calculation.
    Thanks for superb videos

    • @learnelectrics4402
      @learnelectrics4402  Год назад +1

      Yes, you are right. One of my typos. I'm having calculator lessons next week. But look on the good side, it proves you are on the ball. Thanks for the feedback, it is really appreciated and thanks for keeping me on my toes. Dave.

  • @danielteyehuago1633
    @danielteyehuago1633 Год назад

    I'm here again. Thanks for sharing it with us

  • @mdmvukengineer4873
    @mdmvukengineer4873 Год назад +2

    Excellent 👍

  • @usmanseljuq2215
    @usmanseljuq2215 Год назад

    It's awesome, Simply the best

  • @muhammadazam299
    @muhammadazam299 29 дней назад

    You are very helpful sir

  • @mohsenk5985
    @mohsenk5985 10 месяцев назад

    Great information

  • @tabotechconsultingengineer150
    @tabotechconsultingengineer150 Год назад

    your explanations are 5 star ,i am enjoying your work keep it up. now my question , HOW DO WE CALCULATE VOLTAGE DROP OF CABLES INSTALLED IN PARALLEL

    • @learnelectrics4402
      @learnelectrics4402  Год назад

      Appendix 10 of the Regs book is about parallel cables. Thanks for watching and for the great comments, appreciated.

  • @linossinkala7840
    @linossinkala7840 Год назад

    Wow super

  • @Nigel1969
    @Nigel1969 Год назад

    Great work as always and in a real life scenario ...would change the 4mm t and e to 6mm giving 1.9% Vd saving on cost for customer lol...but just showing i understand :)

  • @saint1568
    @saint1568 Год назад

    love your videos ......

  • @robinj9631
    @robinj9631 Год назад

    Great video as always . What is the difference between the bs7671 regulations and the on site guide ?

    • @learnelectrics4402
      @learnelectrics4402  Год назад +1

      The on-site guide is a mini reference book with user friendly sections that are based on the actual Regs,

  • @smartchip
    @smartchip Год назад

    Simply helping the few youngsters that are going into the Trades and not the WOKE production line factories aka universities ( until now, not S.T.E.M)

  • @ww-mc8pv
    @ww-mc8pv 11 месяцев назад

    Hello Dave, thanks for the video. I am wondering the difference between the one you mentioned and the another formula 2 x K x I x L for single phase, 1.732 x K x I x L for three phase, whereas K is 12.9 for copper and 21.2 for aluminum? Thank you

    • @learnelectrics4402
      @learnelectrics4402  11 месяцев назад

      It depends on the csa of the cable. Thicker cable has less volts drop. Three phase has slightly less volts drop, take a look at table F5(ii) in the OSG. p176.

    • @ww-mc8pv
      @ww-mc8pv 11 месяцев назад

      sorry, I am still confused, which formula is for thicker cable? and which is for thinner one? my understanding is the formula 2 x K x I x L could be used for the cable size from AWG #12 to 1500MCM. Does is mean the formula mentioned in your video is used for the cable size smaller than AWG #12? I would like to read OSG. p176, but what is OSG stands for? thank you@@learnelectrics4402

  • @vachikyadegarian1403
    @vachikyadegarian1403 Год назад

    Big Thank you Dave.A bit of typo in the first example .Vd1= 4.4 instead of 3.52.Excellent I really enjoyed working out the maths .Dave what is the difference between z and x and r plese? Thank you.

    • @learnelectrics4402
      @learnelectrics4402  Год назад +1

      Yes, well spotted. It seems everybody has noticed this. I'm having calculator lessons next week.
      A couple of other chaps have asked me to do a video on the rest of the tables, its now on the list to be done.
      Thanks for watching and keep making sure I stay on track, appreciated. Dave.

    • @vachikyadegarian1403
      @vachikyadegarian1403 Год назад

      ​@@learnelectrics4402Dave you are best of the best.We all appreciate you.Dont think you need calculator lessons .please just keep educating us .Thank you so much.

  • @Hussain-w9k
    @Hussain-w9k Год назад

    Hi Dave could you do a video on Faraday's law

    • @learnelectrics4402
      @learnelectrics4402  Год назад

      What! All of it? OK then, its now on the list.

    • @Hussain-w9k
      @Hussain-w9k Год назад

      @@learnelectrics4402 which list is this and can you provide a link please

  • @angelofranklin1
    @angelofranklin1 Год назад

    Can we also use the (R1 + R2) x L x 1.2 /1000 for the three phase and use the (R1 + R2 ) x L x 1.2 /1000 to do the same calculations independently. Then calculate the % for both the 400 v and the 230 volt independently then adding the total %

    • @learnelectrics4402
      @learnelectrics4402  Год назад

      Why are you using R2 in the calcs. This is nothing to do with the earth conductors. This is the Line conductors and neutral as we are calculating Voltage Drop in a fault free installation, hope this helps. Dave.

    • @angelofranklin1
      @angelofranklin1 11 месяцев назад

      Sorry dave meant the R1 and Rn not R2 as i had stated.

  • @harryangus6755
    @harryangus6755 11 месяцев назад

    Is Ib 80A per phase or across all 3?

    • @learnelectrics4402
      @learnelectrics4402  11 месяцев назад

      Each phase will be 80 amps. Thanks for watching. Dave.

  • @MFak-ln2dk
    @MFak-ln2dk 10 месяцев назад

    how you sum three phase vd to single phase vd i thinf first you must convert 3ph vd by divide it 1.73 then you sum thanks

  • @Weaselspleen75
    @Weaselspleen75 Год назад

    Great video but I believe the total answer to be 2.73% on the first example using 4.4v instead of 3.52v

    • @learnelectrics4402
      @learnelectrics4402  Год назад +2

      You are correct. A couple of you have spotted that. I must learn how to use a calculator. Thanks for keeping me on my toes, Dave.

    • @berkotropia
      @berkotropia 10 месяцев назад

      @@learnelectrics4402 You are still our master regardless a few tiny mistakes!

  • @michaelcostello6991
    @michaelcostello6991 2 месяца назад

    2 core cable .. Is that live and neutral ? What about the earth , is that ignored in the calculations. ? Also three or 4 core cable. Does that mean 3 phase or 3 phase and neutral. Is the earth always ignored ?

    • @learnelectrics4402
      @learnelectrics4402  2 месяца назад

      For voltage drop we are assuming a no fault situation, otherwise there would be no need to worry about voltage drop because the fuse will blow, so we ignore the earth. So voltage drop is just about the line and neutral. This video is on single phase. Thanks for watching, appreciated. Hope this helps. Dave.

    • @michaelcostello6991
      @michaelcostello6991 2 месяца назад

      @learnelectrics4402 thanks. That makes complete sense

  • @Webbster77
    @Webbster77 Год назад +1

    Think there’s a mistake at 10:26

    • @danieloj2076
      @danieloj2076 Год назад +2

      I second that. The Vd1 volt drop should have been 4.4V not 3.52V

    • @learnelectrics4402
      @learnelectrics4402  Год назад +1

      You're right. Where on earth did I get 3.52 from. But it proves you're paying attention.
      Thanks for spotting that, really appreciated. Dave.

    • @learnelectrics4402
      @learnelectrics4402  Год назад

      Yes it should, well done. Thank you. Dave.

    • @Webbster77
      @Webbster77 Год назад

      @@learnelectrics4402 you just got 2 and 5 the wrong way round, easy done

    • @Webbster77
      @Webbster77 Год назад

      @@learnelectrics4402 really enjoy your content by the way, one of the best channels on UK electrical learning 💪