OVERCURRENT DIFFERENCES - OVERLOAD - SHORT CIRCUIT - EARTH FAULT - WHAT ARE THEY & HOW DO THEY WORK?

[@SeanyyBoy_]

Honestly, KZbin can be a great platform when people like you add knowledge like this to it. Incredible how much I can learn in my journey to becoming a master electrician. Not just a sparky. Thankyou for your time and effort mate 👍

[@learnelectrics4402]

I appreciate that, great feedback, thank you. Good luck in your career, its always been good to me and taken me around the world several times on different contracts.

[@krazylad84]

Excellent Dave. I remember before you started this channels, I had so many questions in my mind but today I need to think about if there is anything else I should ask you. Cheers and highly appreciated your work !

[@learnelectrics4402]

Thank you, great comments. Dave.

[@abdoaiman]

Really simple & thorough explanation.. Thanks dave

[@learnelectrics4402]

Glad it was useful.

[@vachikyadegarian1403]

Fantastically explained in simple way.Thank you Dave.

[@learnelectrics4402]

Glad it was helpful and I really appreciate the feedback. Thanks.

[@bobbyearayil]

Thanks. This brought lot of clarity and helped me clear the doubts I had.

[@learnelectrics4402]

Glad it was helpful, thank you.

[@AngelaPeters-fy1tc]

Excellent Dave its so much clearer now.

[@learnelectrics4402]

Good to hear that, the video has done its job. Thanks for watching, appreciated. Dave.

[@mb-electricalservices]

When on site, an overload is easily identified by the delay in overcurrent protective device (MCB) operating. Usually a few seconds or even minutes in some cases. A short circuit is generally instantaneous tripping sometimes accompanied by a small flash or popping sound at the MCB. Depending on the size of fault current, the MCB can be rendered inoperable if the fault current exceeds the rated MCB's breaking capacity (usually 6kA for a BSEN 60898). Generally, 3 faults which exceed the breaking capcity will require a replacement MCB. Theres lots more to this but you get the general idea.

[@learnelectrics4402]

Thanks for watching Mike. Thanks for the input, Dave.

[@mb-electricalservices]

@@learnelectrics4402 You're welcome Dave. Love watching your content! It keeps my mind fresh when my memory fails me. :) Best wishes, Mike

[@zed.kelectrical8741]

Thank you Dave - again you give a clear explanation of important distinctions. And of course I will be writing it down in my crib book, which owes a lot to 'Learn Electrics' 👍

[@learnelectrics4402]

That's the important book. I always kept a tech tips book, still do.

[@jamalel-sahati8632]

thank you Dave

[@learnelectrics4402]

Thank you Jamal, your support is appreciated. Dave.

[@vinzers1311]

Excellent explanation Dave.. Please make a video on selectivity of circuit breakers.

[@learnelectrics4402]

Its on the list now. Thanks.

[@freezefoot]

Good clarification and revision.

[@learnelectrics4402]

Glad you found it useful, thanks. Dave.

[@juicespirit]

Great as usual

[@learnelectrics4402]

Thank you, great support, appreciated. Dave.

[@ovieoyegwa6153]

very good explanation

[@learnelectrics4402]

Glad you think so and lots more to come. Dave.

[@danielteyehuago1633]

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

[@learnelectrics4402]

Glad it was helpful Daniel. Thanks for the support.

[@paulward143]

Really good video, very informative. Thanks

[@learnelectrics4402]

Glad it was helpful Paul, thanks for watching.

[@moaazkhalifa5522]

Love this video!! Thank you for all your hard work man!! Keep going please!

[@learnelectrics4402]

Every intention of making more videos. Thanks for watching.

[@rafismoli8457]

A great video. Well explained. Just wonder on the diagram there is a path between line and neutral becomes a parallel path. When a parallel path can become short-circuit?

[@learnelectrics4402]

Absolutely. In the wrong place we will have a short circuit. The only place they should be connected is through the load. Thanks for watching. Dave.

[@rafismoli8457]

@@learnelectrics4402 this makes a sense. Thanks for the answer.

[@martinburgess2322]

Cheers Dave 👍spot on as always 😎

[@learnelectrics4402]

Thank you Martin. I appreciate your support.

[@Dibbo1979]

Great video once again👍🏻

[@learnelectrics4402]

Thank you. Appreciate your support.

[@AndrewCook7]

Hi Dave Can you please explain what i2 < 1.45 x iz is

[@learnelectrics4402]

That's a good theme for a video. It's on the list. Dave.

[@AngelaPeters-fy1tc]

What about an earth fault between neutral and earth now that the neutral I take it also carries current because the boffins changed the old term live to line and the reason for this is because there are 2 live wires ie neutral and line hence why the live was changed to line. Does this make any sense, or is it because the neutral isnt live all the time just on the return after the load. Please Dave help me clarify whether the neutral carries current or not cheers and a fantastic video .

[@learnelectrics4402]

This is how I look at it ... Think of a central heating radiator. The hot water goes in at one end and cooler water comes out the other. If the cooled water does not go back to the boiler to be reheated, then no new hot water can enter the radiator. Same with line and neutral. The de-energided neutral current must flow back to the transformer to be re-energised in order for fresh, energised current to flow into the line conductor and the load. Hope this helps.

[@mohdsufianabdmajid7570]

Hi sir..sorry and just need explanation about my situation. I have issue wiring short between E and N and rccb 100mA is not trip. This time no load is turn on. Reading of impedance loop is around 0 ohm. * But whenever 1kW load rccb will trip. If you don't mind I just need your explanation. Really appreciated and thank you.

[@learnelectrics4402]

Have a look at the two videos about RCBOs and RCDs. kzbin.info/www/bejne/kGLKqIJje9iohLs kzbin.info/www/bejne/bIDKknVmd66dZ5o

[@bashiruosman473]

Well done

[@learnelectrics4402]

Thank you Bashiru, appreciated,

[@erwinarief4567]

great video...

[@learnelectrics4402]

Thank you, appreciated.

[@ramphago1240]

Great video as always

[@learnelectrics4402]

Appreciate that Ram, thanks for watching.

[@sergiofernandez3725]

Good stuff

[@learnelectrics4402]

Glad you enjoyed it Sergio. Thanks for watching.

[@ammarbasrah1362]

What is cpc meaning

[@learnelectrics4402]

CPC is circuit protective conductor. Have a look at this video, iyt explains it as it goes along and will help you. Dave. kzbin.info/www/bejne/fKWwhqigbayUkLM

[@brianhewitt8618]

👍

[@learnelectrics4402]

Thank you Brian, great support as always. Dave.

[@BuzzJunkey87]

I am a DIY guy - When I use a two pole voltage tester on the live and neutral on an unenergised lighting circuit I get a 12+- volt read back. The same happens on the cpc. Therefore I think the is an earth fault somewhere on the circuit?

[@learnelectrics4402]

Disconnect the line and neutral at the CU. Volts test LE, LN and NE at the CU - neutral bar, earth bar, circuit breaker.and see what you get.

[@BuzzJunkey87]

@@learnelectrics4402 thanks, I think for this I would need an electrician if it’s the consumer unit. Building Regs and all

[@danielteyehuago1633]

I'm here again

[@learnelectrics4402]

You keep coming back Daniel. Thanks for watching.

[@sajad459]

Life is cruel, there is no name for the condition when neutral touches cpc. None of them has any pressure. people don't care about them.

[@learnelectrics4402]

Perhaps we could call it a cuddle. A neutral to Earth cuddle. Good point Sajad. Thanks for watching, Dave.

[@30mAkills]

Overload is a sugar coated slow poison! I think you forgot to mention about rodents!

[@learnelectrics4402]

Thanks for the input, appreciated, Dave.