Пікірлер

• 
  @Ibrahim-vt2tz3 күн бұрын

  Nice video good explanation but your hand is on the way we can not see RCD tripping ❤❤❤❤

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  @ElectricalStudentsUKКүн бұрын

  👋 😂 sorry pal. Promises it is tripping!

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  @mikethemask152514 күн бұрын

  So im not sure why your testing pfc on the L-L L-N on the tester it should be L-PE for L to E pfc then for PSC should be L-L L-N setting both tests are 2 hi......

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  @TacoDaddy-mr8ig15 күн бұрын

  Useless video

• 
  @saviourattard831719 күн бұрын

  😢😢😊

• 
  @ElectricalStudentsUK24 күн бұрын

  Hi there, I'll have a think about how to make a video as requested. I have been teaching level 2 and 3 electrical for many years and I so have a pretty good idea as to what will be asked in exams. Really it's just experience of the exams that allows me to navigate the books so well. For more formula sheets and helpful guides head to the shop at www.electricalstudent.co.uk

• 
  @qaimrul25 күн бұрын

  Any chance you can do a video on how you navigate on site guide. Like labelling it and how you understand it easily so you know what pages you have to get too. Thanks

• 
  @ElectricalStudentsUK26 күн бұрын

  No worries mate, glad they have helped you. For more help and guidance, including formula sheets and step by step guides check out the shop at www.electricalstudent.co.uk

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  @JustConkeh26 күн бұрын

  Mate these collection of videos on level 3 science have saved me so much time and questions as i am currently studying for the exam, thank you, i really appreciate it.

• 
  @mikegmarshallАй бұрын

  Well explained chap!

• 
  @NaciMahmut-rf5xfАй бұрын

  Is that the 1st time you opened that regs book or do you keep it in a safe? Mine looks like a tiger was reading it.

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  @graemesmithson6307Ай бұрын

  The test you have performed is incorrect and is only testing the RCD for the DB and is not recorded on the sheet you have used. The RCD test for a circuit should be carried out at the furthest point of the circuit. This will take into account the circuit resistance R1+R2 and Rn. The test you carried out is only using the external impedance Ze at the DB and not the fault circuit as a hole. The aim of the test is to take the total resistance of the circuit, the fault path, which will determine how quick the RCD will trip under fault conditions, the higher the resistance the slower the trip time. Therefore the RCD test requires to be done on every circuit and recorded in the location you used. The test you carried out is recorded on sheet 2 under, Main switch / Switch Fuse / Circuit breaker / RCD, under "If RCD main switch". I would take this done before someone gets hurt and is traced back to your KZread. I am retired now but I am an Accredited Electrician.

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  @Dog-whisperer7494Күн бұрын

  I have been a qualified electrician for thirty eight years. Point one what is an accredited. There is no legal requirement or regulation requirement for any spark to be registered/accredited . Never has been. The purpose of the RCD test is to determine if it will trip within a specified time ie at 1x its rated current we expect it to trip in less than 300ms at 5x in less than 40ms . We can test at the socket or the CU . If you already know what the Ze and Zs values are and you want to know the the RCD will operate at we do a ramp test which will tell how much current it takes for the RCD to operate.

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  @Dog-whisperer7494Күн бұрын

  Watch the video again. He did the test correctly. He clearly tested the lighting circuit and he probed onto the outgoing side of the MCB . If he did what you are talking about then he would test at the top of the RCD ie green lead on the earth bar brown probe on the RCD line and blue probe on the RCD Neutral. .

• 
  @BLOCKsignallingUKАй бұрын

  6:38 Clipped direct: Would than not be "Single Layer on Wall or Floor" row in table F3 ?

• 
  @user-ey3sq4tb5lАй бұрын

  thanks for your great video, but the question is when you try to find It, you had a look at table F6 which is for flat cables, while in the question asked for single core cable!!

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  @ElectricalStudentsUKАй бұрын

  It is difficult to make videos for different levels. If you're doing a cable calc from the OSG, then it's basic and you will be a level 2 student. When you start using BS7671, you'll be completing a much more indepth cable calculation, using all of the correct tables, depending on what type of cable you have. My videos are aimed at college students who are just starting out in their career. Which is another reason I'm trying to expose them to the many different C factors and reference methods. I'm glad you've found the video helpful in some way! 😊

• 
  @ForidKhan1232 ай бұрын

  I was wondering Zs is measured in Ω not time. But glad you corrected that.

• 
  @IAmDefauLTz2 ай бұрын

  Where did you input the earth lead in the back of the tester for the test? also do you double this value if its 3 phase?

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  @ElectricalStudentsUK2 ай бұрын

  The Green earth lead goes in the green L2 port on the back of a Megger Multifunction tester. Other testers will he different. You do not double the value for 3 phase. The earth fault current will only travel down one of the phase cables in 3 phase, to activate the protective device. Therefore even in 3 phase, the calculated Ipf will always be 230/Zs

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  @davoc51403 ай бұрын

  Hello! That was really great. You explained things very well. You know when you did the test for ALL the circuits at once ? You mentioned you switched off the power and put the cable from the "load" end and the other cable to the earth/ Neutral. I was told by my teacher that an OVR can be damaged if you do this. Or does it mean you can do what you did as long as there is no digital OVR? Sorry for stupid question!!!

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  @ElectricalStudentsUK3 ай бұрын

  Your teacher is indeed correct. Some voltage sensitive devices such as an OVR and even some RCBOs can be damaged having 500V put through them. You are also correct, if your installation is a simple one, with no voltage sensitive equipment, like my small test board in the video, then it is fine to test the entire board this way. Look in Chapter 10 of your OSG and it gives pictures on performing this test

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  @davoc51403 ай бұрын

  @@ElectricalStudentsUK Thank you!

• 
  @HH-oi8hn3 ай бұрын

  Your handwriting beautiful

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  @HH-oi8hn3 ай бұрын

  Well done,excellent and clear explanation, may God bless you ,thanks

• 
  @SpinSkins3 ай бұрын

  Thank you, I hope my explanations help with your learning journey

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  @HH-oi8hn3 ай бұрын

  @@SpinSkins your explanation really helped me understand some things that were Ambiguous to me. Thanks 🙏

• 
  @barrysimmons55493 ай бұрын

  I'm confused if you're doing an RCD life test. And there are different ones when it comes to radios/ring. Which one do you do If ring s using the plug socket. And radials. Is using crocodile tips. Can anyone please explain. I thought RCD is one test.

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  @graemesmithson6307Ай бұрын

  See post above. The test you have performed is incorrect and is only testing the RCD for the DB and is not recorded on the sheet you have used. The RCD test for a circuit should be carried out at the furthest point of the circuit. This will take into account the circuit resistance R1+R2 and Rn. The test you carried out is only using the external impedance Ze at the DB and not the fault circuit as a hole. The aim of the test is to take the total resistance of the circuit, the fault path, which will determine how quick the RCD will trip under fault conditions, the higher the resistance the slower the trip time. Therefore the RCD test requires to be done on every circuit and recorded in the location you used. The test you carried out is recorded on sheet 2 under, Main switch / Switch Fuse / Circuit breaker / RCD, under "If RCD main switch". I would take this done before someone gets hurt and is traced back to your KZread. I am retired now but I am an Accredited Electrician.

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  @barrysimmons55493 ай бұрын

  Hey mate when you're doing R1 R2 for ring. Are you meant to add them up and divide it by 4?

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  @ElectricalStudentsUK3 ай бұрын

  Hi there, if you're doing the correct cross connections for the R1 + R2 test, as shown on p117 OSG. Then that reading is the correct R1 + R2 value. The test you would have done before, the end to end test for live, neutral and earth. Its those values, if you add the live and earth end to end value together, then divide by 4. You should get the same as the R1 + R2 value.

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  @barrysimmons55493 ай бұрын

  Brilliant thank you so much mate

• 
  @viliamemasirewa969218 күн бұрын

  Ring circuit do you mean to do your L-L , N-N and CPC -CPC for step 1 And step 2 and 3 you do R1 +Rn and R1 +R2 but use the plug on the socket to step the process?????

• 
  @garytaylor10263 ай бұрын

  😒 Promo SM

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  @ashleyhutton70463 ай бұрын

  You are a legend, best video on cable calcs hands down.

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  @ashleyhutton70463 ай бұрын

  @@SpinSkins Would you know the formula on how to work out the Iz of a 4mm ring circuit?

• 
  @ElectricalStudentsUK3 ай бұрын

  Thank you mate, glad my videos help you

• 
  @user-ey3sq4tb5l3 ай бұрын

  first of all thank you for your presentation. secondly as it says in on-site guid to remove RCD, I wonder why you turned on RCD while you were doing insulation resistance test ?

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  @jamesbrosnan8822 ай бұрын

  Yes you remove all sensitive devices and also if you had a fault within a circuit you only did live to earth not live to neutral, good presentation but more detail needed

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  @goaway94873 ай бұрын

  You should be using Your design current as this circuit can’t be overloaded. 433.1.1 says you can as long as it’s a greater value than both design & protective device rating currents. Using your way is not very practical in the real world & leads to larger & more expensive cables when they’re not really needed.

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  @ElectricEssenceLtd4 ай бұрын

  Great knowledge refresher buddy. Keep up the good work

• 
  @ElectricalStudentsUK4 ай бұрын

  Unfortunately I have only uploaded work, explanations and questions for level 2 topics. Illuminance is covered in level 3 or years 2 and 3 of an Apprenticeship

• 
  @wdc43474 ай бұрын

  Hi Daniel, on your website,are there exercises to practice with all this for formulas? Thanks

• 
  @ChooseLife.YourLife5 ай бұрын

  Now that type A is the standard rcd's to be tested rather than when it used to be type AC rcd's, do i need a different function on my tester? I can't seem to find a setting on it which will change between the different types of rcd's

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  @ElectricalStudentsUK5 ай бұрын

  The RCD setting on most tester will test any type of RCD. You only need to change the mA setting that matches the mA rating of your RCD

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  @Dog-whisperer7494Күн бұрын

  No you are only required to test the RCD/RCBO on the Ac setting at it rated close ie 30ma regardless of what type the RCD is and you only need to test at one times half time and five times test is no longer required.you can do them if you want to but you are not required to do them.

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  @teed15 ай бұрын

  I still couldnt understand where that 6.16 came from while i was expecting 2.5

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  @ElectricalStudentsUK5 ай бұрын

  If you do not know the size of the cpc, then you match it to the size of the line conductor. In this instance, the live was 6mm. Looking at table I1 OSG, the milli ohm per metre value of 6mm live and 6mm earth is 6.16. This value is used to find out R1+R2 which eventually leads to the adiabatic equation of calculating S, the minimum csa size of the cpc

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  @teed15 ай бұрын

  Thank you@@ElectricalStudentsUK

• 
  @butterfingers54045 ай бұрын

  Thank goodness I finally found someone who can explain this stuff in a way I can understand it.🙌

• 
  @eyazdani45375 ай бұрын

  Minutes 13, should be written mV/A/M.

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  @ElectricalStudentsUK5 ай бұрын

  Yes well spotted! Sorry for my mistake

• 
  @eyazdani45375 ай бұрын

  Thanks for your informative educational videos. 👍

• 
  @ElectricalStudentsUK5 ай бұрын

  No worries mate. Anything you're unsure of and want me to go over for you, let me know

• 
  @Djredsielofficial5 ай бұрын

  🙏 the journey begins 😅

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  @ElectricalStudentsUK5 ай бұрын

  Are you doing level 2 or level 3?

• 
  @Djredsielofficial5 ай бұрын

  @@ElectricalStudentsUK level 2 & 3 😁

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  @ElectricalStudentsUK5 ай бұрын

  ​@Djredsielofficial Good pal, check out the website www.electricalstudent.co.uk for loads of mock test questions, all formula sheets and guide sheets to help with all of your exams!

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  @Djredsielofficial5 ай бұрын

  @ElectricalStudentsUK Thanks mate . signed up mate Waiting for confirmation 👍

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  @Djredsielofficial5 ай бұрын

  Just what I needed Thank you

• 
  @ElectricalStudentsUK5 ай бұрын

  No worries. Glad the video has helped you

• 
  @nickbanwell57715 ай бұрын

  Could you please do a video on the tabs you’ve got on your regs book, looks so much easier to navigate. 🙏

• 
  @sasalotas5 ай бұрын

  Great video. Starting my lvl 3 next week

• 
  @ElectricalStudentsUK5 ай бұрын

  This video will really help you, check out my level 3 formula videos when you start the maths and scientific principles module. There are formula sheets and a step by step cable calculations guide in my shop at www.electricalstudent.co.uk They will be really helpful to you

• 
  @wdc43476 ай бұрын

  Thanks for another great video..

• 
  @wdc43476 ай бұрын

  Thank you, mate, for your time. I bought the tabs very helpful.

• 
  @eduardogoncalves41596 ай бұрын

  So, I just come across your video and I literally just copied my question into google and came here out of curiosity , my question is pretty much exactly like yours with the expectation of the cooker instead it is just one cooker at 10.37kW rather than yours which is 2 x 6.5Kw. I'm just wondering where did you get your question from? Mine is from Level 3 Advanced Technical Diploma in Electrical Installation Unit 303 Worksheet 11 Question 3 *2024*.

• 
  @ElectricalStudentsUK6 ай бұрын

  Hi pal. They are exam style questions I make up for students like you. For more exam style questions, formulae sheets and guides, check out www.electricalstudent.co.uk

• 
  @craigrod57285 ай бұрын

  Hi am just wondering when you add up the total I got 188.8 I don't understand how u got you're answer can you please show me thank you

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  @ElectricalStudentsUK5 ай бұрын

  ​@craigrod5728 you have added the first 12.43. Only add everything that has been underlined. Using diversity, you only use 75% of 12.43, which is 9.3. When totaling up the maximum demand, we only include the 9.3, not the 12.43

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  @craigrod57285 ай бұрын

  Oh ok got that thanks

• 
  @ElectricalStudentsUK6 ай бұрын

  In short, yes. It is a test board, so there is actually fed from a board and RCD. I think the 2 cable, low test is a patent of Megger. Which prevents boards from tripping.

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  @BULLEAD6 ай бұрын

  Why did you use 2 Lo and not 2 hi, was this because you have an upstream RCD?

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  @qualityservice19856 ай бұрын

  Thank you pal. you just save me nights trying to figure it out on my end. I am getting ready for my level 3 electrical installation test, now I feel more confident. thank you again

• 
  @ElectricalStudentsUK6 ай бұрын

  Glad to have helped you pal. Head over to www.electricalstudent.co.uk to find more tips and guides to help you pass your level 3 exams. Good luck in your upcoming exams!

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  @alanmarriott92166 ай бұрын

  Great vids but any chance you could do video explaining what high or low readings etc on test could mean please?

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  @Zishan-videos_entertainment7 ай бұрын

  Sir ek problem ye hai ki mere ghar ki electric bill bahut jada aara hai fir mai ne complaint kiya tho electric board wale bolte hai shyd aapki earthing problem hai ya aapke ghar ki wiring problem hai iske wajeh se aapki ghar ki electricity bill aa rahi hai ya aapke ghar ki freeze me problem hai ya aap ghr ki wiring cheak karo ya earthing proper karlo mai ne earthing cheak ki sahi hai bulb se cheak phase aur earthing acche se glow ho rahi hai abh wiring me kya cheak karna hai o batao sir aur proper earthing na hone se electric bill jada aati hai kya 400 unit aati hai har mahine plz help

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  @mohamedsiadabdille76317 ай бұрын

  Thank you very much really enjoying your RCD test, I appreciate your time, Cheers

• 
  @ElectricalStudentsUK7 ай бұрын

  My pleasure!

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  @BridgetMukwazhi-yz9ui8 ай бұрын

  Brilliant 👏

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  @BridgetMukwazhi-yz9ui8 ай бұрын

  So much thank you

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  @ElectricalStudentsUK8 ай бұрын

  WOW! You here about these truly unprofessional horror stories but I somehow think they're made up. I just wouldn't ever think there are tradesmen out there that actually do such dangerous practices! Thanks for sharing pal ❤

• 
  @2dark4noir8 ай бұрын

  Title says "explained" but there wasn't an explanation for anything here.

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  @darrynlambert6768 ай бұрын

  Observation Test to pipe ok this is prob grounded but does not prove cable is intact T over distance hidden in fabric of building , Personal view need to disconnect at bonding clamp and test continuity of 10mm back to board I’ve come across were the clamp at gas main has clamp short 10mm silicone into hall in wall going nowhere just to trick the eye , just some polite input and thank you