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CABLE SIZE CALCULATIONS - ON-SITE GUIDE APPENDIX F - AMENDMENT 2 - USING THE TABLES - MAKING CHOICES

LEARN ELECTRICS
2023 ж. 18 Там.
15 746 Рет қаралды
Жүктеу

The On-Site Guide is a useful little book, packed full of information. But sometimes, working out what it’s telling us can be difficult, and not just for new starters in the trade.
Take this question for example … a frequent question.
I’ve seen this formula in the on-site guide, what does it mean?
And it looks complicated, how is that going to help me?
In this video we will look at Appendix F of the On-Site Guide, a very useful appendix that helps you to select the correct size cable given the various installation conditions. And we show you how to use Appendix F to find the answers.
Almost everything that we do to a cable will cause it to heat up, even over-heat and become damaged. Choosing the right size cable is therefore in everyone’s interest. We show you how to make the right calculations with fully worked examples so that understanding and confidence improve.
What matters most is putting the right cable into the installation from the outset.
This is video number 214 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.

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  • give this man a medal. no one is doing it like dave. thank you dave appreciate all your hard work

    @ck101085@ck10108512 күн бұрын

    • Wow, thanks, that is really appreciated. Dave.

      @learnelectrics4402@learnelectrics440212 күн бұрын

  • Wow! This is very informative, thanks for sharing it with us. It worth it and the best tutorial on the topic for me.

    @danielteyehuago1633@danielteyehuago16338 ай бұрын

    • Glad it was helpful Daniel. Keep spreading the word and lots more to come. Dave.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • Thank you Dave for helping us to remain technically minded as we appraoch each job. It's always a good reminder to give attention to how we design each circuit to make sure that it complies. As always much appreciated and keep up the good work. 👏🏾

    @francoistoumany3841@francoistoumany38418 ай бұрын

    • Very welcome and thanks for the positive comments. Dave.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • A handy tip that's stuck with me since I was told it about the < & > symbols is that the < looks a bit like a squashed L (for less).I'd never had difficulty with them but this is just saves that bit of thinking. Also, when using a calculator, the = button is your friend. So 20÷.88= (then) ÷.725= gives the answer without the additional step or using M+ and MR. Thanks again for your incredible content.

    @stegra5960@stegra59604 ай бұрын

    • Excellent support. Thanks for the input, it will help many. Dave.

      @learnelectrics4402@learnelectrics44024 ай бұрын

  • Another great simple elegant presentation.

    @BlaqRaq@BlaqRaq8 ай бұрын

    • Thanks again, thanks for the support.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • One of the best Elec tech sites on the web helped me understand how to wire sockets & lights into my son's ring circuit house which I had not come across before although I was competent to carry out all the work myself

    @ragnor56@ragnor568 ай бұрын

    • p😮😮

      @philipekine7278@philipekine72788 ай бұрын

    • Glad it helped, thanks for watching.

      @learnelectrics4402@learnelectrics44028 ай бұрын

    • Thanks for watching.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • thank you easy

    @AhmedMohammadali-pn3ud@AhmedMohammadali-pn3ud6 күн бұрын

  • Fantastic tutorials keep up the good work 👍

    @kristianbarrett7215@kristianbarrett72158 ай бұрын

    • thanks for the comments. Yes, lots more to come. Dave.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • Very very useful. Thanks.

    @user-qi8tv2sj4m@user-qi8tv2sj4m8 ай бұрын

    • You are welcome, thanks for watching. Dave.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • great video to re-cap. thank you.

    @dannysmith2408@dannysmith24087 ай бұрын

    • Glad it was useful. Dave.

      @learnelectrics4402@learnelectrics44027 ай бұрын

  • The best !

    @bigbud1978@bigbud19788 ай бұрын

    • Excellent, that's good to know. Thanks for watching. Dave.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • Thanks Dave-informative video, and very understandable graphics

    @davidpatterson1574@davidpatterson15748 ай бұрын

    • Glad you enjoyed it and thanks for the positive feedback. Dave.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • Another great simple elegant presentation. Super @:)

    @SuperCwiczenia@SuperCwiczenia8 ай бұрын

    • Thanks a lot, appreciated.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • Excellent, correct design is always very important 👍

    @brianhewitt8618@brianhewitt86188 ай бұрын

    • Absolutely. Thanks for your supportive comments Brian, appreciated.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • This video is amazing! Keep up the good work because I’m learning a lot.

    @simplymiswak4010@simplymiswak40102 ай бұрын

    • Will do, thanks for watching. Dave.

      @learnelectrics4402@learnelectrics44022 ай бұрын

  • Very useful and informative video thanks

    @terietaietawa6800@terietaietawa68008 ай бұрын

    • Thank you, appreciated and thanks for watching.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • Amazing

    @sharifwalo4257@sharifwalo42577 ай бұрын

    • Thank you, great feedback.

      @learnelectrics4402@learnelectrics44027 ай бұрын

  • Thank you so much!

    @nohandle747@nohandle7474 ай бұрын

    • You're welcome. Dave.

      @learnelectrics4402@learnelectrics44024 ай бұрын

  • Thanks

    @radhialiue1974@radhialiue19748 ай бұрын

    • You're very welcome. Thanks for watching. Dave.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • brilliant thank you so much

    @23sasr@23sasr4 ай бұрын

    • Glad it helped. Dave.

      @learnelectrics4402@learnelectrics44023 ай бұрын

  • Thanks for the video...

    @franciscogago5961@franciscogago59617 ай бұрын

    • My pleasure. Dave.

      @learnelectrics4402@learnelectrics44027 ай бұрын

  • Hi Dave Can we please have a video about installing single cables for lighting circuits in steel conduit and how we prevent Eddie currents, thanks for everything mate

    @user-cs9ch8ey9k@user-cs9ch8ey9k8 ай бұрын

    • Its on the list. Thanks.

      @learnelectrics4402@learnelectrics44028 ай бұрын

  • Smashing 💪🏻

    @Sergey3023@Sergey30233 ай бұрын

    • Thank you, appreciated

      @learnelectrics4402@learnelectrics44022 ай бұрын

  • Great video, watched it twice now 😂

    @Oufg103f@Oufg103f2 ай бұрын

    • Great to know. Thanks for the feedback, appreciated. Dave.

      @learnelectrics4402@learnelectrics44022 ай бұрын

  • Brilliant explanation .but just wondering where about in question said what reference method is that. Thanks

    @mehdikhodabakhsh-fb3ez@mehdikhodabakhsh-fb3ez4 ай бұрын

    • It is all in the question, the data/clues are all there to work out the reference method. Have another look at the video and follow my working through.

      @learnelectrics4402@learnelectrics44024 ай бұрын

    • @@learnelectrics4402 thanks for your reply .boss page .I just have looked again you are right 👍

      @mehdikhodabakhsh-fb3ez@mehdikhodabakhsh-fb3ez4 ай бұрын

  • Thanks, another great video. Does this apply also to a ring final, wired in 2.5mm TC+E? I’m bashing my brain against this because on the one hand OSG part 7 says we can use 2.5mm cable for an I n of 32 A, and an I t 32/0.8 = 40 A; but the current carrying capacity of 2.5mm cable is nowhere near that? I can’t help thinking I’ve missed something that is written in the books somewhere that explains the case for ring finals … ?

    @grmo1875@grmo18753 ай бұрын

    • With a ring circuit, you have two 2.5mm wires - making 5mm of conductor. That is why the figures seem higher. Take a look at this video. Dave. kzhead.info/sun/aauHkpWLineghJ8/bejne.html

      @learnelectrics4402@learnelectrics44023 ай бұрын

  • Great work 👍, I have a question what about Iz as i am getting it mixed up with It.

    @MotherboardRepairs@MotherboardRepairsАй бұрын

    • Iz is the amount of current a conductor can carry 24/7 under the installation conditions that affect it.

      @learnelectrics4402@learnelectrics4402Ай бұрын

    • @@learnelectrics4402 Thanks for the quick reply, I understand Iz is current carrying capacity but where i struggle to understand is when working out the formula sequence e.g Should it be; Iz ≥ In = It Ca x Cg Or It ≥ In = Iz Ca x Cg

      @MotherboardRepairs@MotherboardRepairsАй бұрын

  • great

    @ashrafhalimy1619@ashrafhalimy16193 ай бұрын

    • Thank you, apprteciated.

      @learnelectrics4402@learnelectrics44022 ай бұрын

  • Thanks for the video, where can i find the guide ?

    @ranazayed6304@ranazayed63045 ай бұрын

    • Amazon is a good price for the on site guide. make sure it is the latest version, amendment two, brown cover.

      @learnelectrics4402@learnelectrics44025 ай бұрын

  • Great vid! Quick q.. for question 1 why is the ref method C and not 100? ref method 100 mentions insulation doesn't exceed 100mm for which it doesn't as it's 50mm? thanks!

    @david-ip9cm@david-ip9cmАй бұрын

    • Ref method C is the starting point for the reference methods. This has the highest permissible current for a size of conductor. All the others are reductions on the Ref C figures. Hope this helps.

      @learnelectrics4402@learnelectrics4402Ай бұрын

    • @@learnelectrics4402 so do we always use ref method c for the exam questions on the 2365 203 exam?

      @kashif4463@kashif4463Ай бұрын

  • Please what of the cable calculation for single and three phase motors

    @danielteyehuago1633@danielteyehuago16336 ай бұрын

    • Take a look at this video. If you know the load, you can calculate the amps and cable size. kzhead.info/sun/lbyidZ2am3iCpo0/bejne.html

      @learnelectrics4402@learnelectrics44026 ай бұрын

  • I'm here again

    @danielteyehuago1633@danielteyehuago16336 ай бұрын

    • You're very welcome.

      @learnelectrics4402@learnelectrics44026 ай бұрын

  • How do I make a donation

    @MrBeats44@MrBeats4427 күн бұрын

    • The best donation is to tell others about the LearnElectrics channel. Spread the word. Thanks, Dave.

      @learnelectrics4402@learnelectrics440217 күн бұрын

  • hi mark niels

    @ryanelliott6534@ryanelliott6534Ай бұрын

    • hi ryan

      @harveylennox1128@harveylennox1128Ай бұрын

    • @@harveylennox1128 hey babe

      @ryanelliott6534@ryanelliott6534Ай бұрын

    • Thanks for watching.

      @learnelectrics4402@learnelectrics4402Ай бұрын

    • Thank you for watching.

      @learnelectrics4402@learnelectrics4402Ай бұрын

    • Thank you.

      @learnelectrics4402@learnelectrics4402Ай бұрын
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