SEE ALL - To view a list of all our LearnElectrics videos, click on the link below. There are many videos on many electrical topics including Installation, Part P, 18th Edition, Testing, Certification, Lighting, Sockets, Ring Circuits and much more. kzread.info/dron/YaJQnpO4XAp0yCgqzMkmfA.html

Absolutely brilliant, the best tutorial on utube,calm precise and a whole world of knowledge, thank you sir

One of the best electrical channels on KZread! Absolutely brilliant, easy to understand content! I can not thank you enough!

@learnelectrics4402

3 жыл бұрын

Thank you so much for the fantastic comments. This has really made our day, we are so pleased that we can help. lots more to follow. Dave.

Another brilliant video, love watching your videos, great detail and good to understand, keep up the good work👍

@learnelectrics4402

3 жыл бұрын

Thank you Lee. Great feedback, really appreciated. Dave

I have seen many videos on KZread regarding inspection & testing certification but i must say this video is the best more informative more clear and easy to understand. Well done learn electrics please keep posting informative videos.

@learnelectrics4402

3 жыл бұрын

Thank you very much, a brilliant comment and very much appreciated. Lots more to come. Dave

@vinzers1311

3 жыл бұрын

@@learnelectrics4402 Thank you Really informative channel on KZread.

Brilliant videos great explanation, i pick up so much from them and helps me prepare for my AM2 👍

@learnelectrics4402

2 жыл бұрын

That's great Shane, that is exactly what they are there for. Learn a little every day and it all adds up at the end of a month, a year. Thanks for watching and lots more to come. Dave.

Fabulous video very interesting and informative nd very important to understand and know how to complete the paper work. Thank you for another sterling vidio. 👍

@learnelectrics4402

3 жыл бұрын

Thank you Sean. Your feedback is much appreciated. dave.

Another solid vid

@learnelectrics4402

3 жыл бұрын

Thank you. Great feedback, appreciated.

very Useful info. thank you for that

@learnelectrics4402

2 жыл бұрын

Thanks Karamat. Thank you for watching. Dave.

Thanks. Good explanation

@learnelectrics4402

3 жыл бұрын

Thank you. Glad you found it useful. Dave.

Shared 👍

@learnelectrics4402

6 ай бұрын

Brilliant, thank you.

That's was a good video

@learnelectrics4402

3 жыл бұрын

Thank you for your positive feedback. We try our best to make informative videos. Lots more to come. Bux

Hi Dave, just to clarify, if we have just the one CU in a property then Zdb will be the Ze reading. If we have a second CU then we write the Zs value as the Zdb when we are filling in the documentation for the second CU. Thanks

@learnelectrics4402

3 жыл бұрын

Correct. This was boffins that thought all this up. Glad you are finding it useful. Dave.

@Edgariux111

Жыл бұрын

And here was me thinking that a zdb reading allows you to keep the consumer unit switched ON to test and doesn't impare safety since you're not removing the main earth while testing. So unlike Ze .. This is very handy when performing the test in a factory or warehouse setting where computers and machines are always on .. perhaps I was wrong and working out the Ze reading is the only way around this problem. But I'm not sure I am lol

great explained .i have been following your videos every week . thanks soo much . can you do voltage drop videos ? many thanks

@learnelectrics4402

3 жыл бұрын

It's now on the list. It will happen soon. Keep watching and thanks for the great feedback. Bux

Thank you so much for the concise and brilliant explanation. I wish you were our tutor at college but tbh he's still good lol.

@learnelectrics4402

Жыл бұрын

I'd make you work too hard. Thanks for watching, appreciated, Spread the word, it all helps. Dave.

kewl. I've started ID'ing the RCD'd as RCD L and RCD R on split load boards, with everything else numbered sequentially. Have found it removed any ambiguity when wondering what does what 🙂🙂

@learnelectrics4402

Жыл бұрын

Absolutely right. stay organised, it saves time in the long run. Thanks for watching. Dave.

Hi, I have seen most of your fantastic videos and would like to thank you for your explanation and consideration towards all electricians and students... However, I have a question for you concerning the RCD measurements: What is the reason for recording the X5 measurement, only of the RCD in COLUMN 22, but not x1.? Kind Regards.

@learnelectrics4402

2 жыл бұрын

A decision made by the higher ups. I would have kept x1 and x5 on the sheets. Maybe they were making room to squeeze in a column for AFDDs. Personally, I would always do a x1 as well. I have seen several properties that pass a x5 test but fail a x1. If you don't do the x1, you leave the customer at risk. Thanks for watching, great question. Dave.

Do you need to carry out any tests on the two rcds? Or do you carry out testing on the ring/radial only to prove the rcd will trip within correct time?

@learnelectrics4402

3 жыл бұрын

By preference the RCD can be tested at the point of use, at the lights or sockets for example. It can also be tested direct at the RCD. If you prove at the sockets then no need to test at the actual RCD. Yes, you are checking the RCD trips in the required times.

I find you videos to be really interesting and informative. Referring to your example of a 2nd CU in this video. If you did install a 2nd CU from the existing CU. When you come to fill out the Electrical Installation Certificate, what do you write in the “Supply Protection Device” box. Will it be the MCB details from the existing CU? Thanks for your help and please continue to creat more brilliant videos

@learnelectrics4402

3 жыл бұрын

Good question Lee. 1. Supply Characteristics section, supply protective device refers to the intake position, where the supply comes into the property at the main fuse. So BS 1361, BS88 etc. 2. Particulars of Installation referred to on this certificate is where you put details of this board, the CU you have just installed, so main switch would be BSEN 60947-3 most times, or an RCCB type for garage units etc. Hopefully this helps, thanks for the positive comments, lots more to come. Dave.

@leereid252

3 жыл бұрын

That’s brilliant. Thanks very much. Also, I have 3 consumer units in my house. 1 main CU in the house. Then 1 CU in the garage and 1 CU in the summerhouse. I wonder if I could do 1 electrical test certificate, 1 schedule of inspections and 3 schedule of test results for each CU or would I have to do all 3 parts for each CU? Thanks again for all your help Dave 👍

@learnelectrics4402

3 жыл бұрын

Officially they are all separate installations even though they share a common intake position, each will have it's own Zdb.

@leereid252

3 жыл бұрын

@@learnelectrics4402 brilliant! Thank you. Loving your videos 👍 Are you planning to do any with regards to TT systems? I find it difficult resourcing Information for this subject online. Especially Electrical installation certificates. I’m confused what to record for the maximum permitted Zs (box 8) do I put 1666 for every protective device or write the values in the on-site guide?

Brilliant video. There is one thing I do not find is column 8 the maximum Zs. I do not see in the book I have. Guidance note 3 inspection and testing, IET 17th Edition.There are only 21 columns.

@learnelectrics4402

2 жыл бұрын

We are working to 18th Edition now Sadiq. A lot of things in 17th have been superceded.

@davidcouch007

2 жыл бұрын

This value can be found in the blue 18th edition on site guide (OSG).

Hi Dave In regards to RCD testing section 22, would I need to test each circuit independently & put in a reading or just test for example the 2 RCD's in a split board? Thanks, Ads

@learnelectrics4402

Жыл бұрын

Test the circuit that you have worked on as a minimum. If you have gone there to change a luminaire for example, test that circuit. You wouldn't be expected to test all the house for a minor works job. For new work, test each circuit, same for a Periodic Inspection, that's what you've gone there to do - test. Hope this helps. Dave.

@addz91

Жыл бұрын

@@learnelectrics4402 Thank you for your reply Dave. How about for an EICR? On a split board, can you test just one circuit to operate RCD or do all breakers need to be tested to operate RCD? I'm assuming on a 60898 breaker there's no need to fill in Disconnection times on generic schedule of results? Or am I wrong. Trying to fill out an EICR for an assessment with a split board RCD and 60898 breakers and struggling in regards to RCD section of schedule of test results. Thanks in advance

Hi guys, i have another question. on test schedule for a split board protected by two 30ma rcds, on the test results column for RCD operating current you only fill in the part for the 2 pole RCD and not individual MCBS as they are only protected by a shared RCD is that correct? Also- if all circuits are protected by an RCD would you need to carry out RCD tests on ALL circuits and fill in on test results or is one circuit sufficient? thanks

@learnelectrics4402

3 жыл бұрын

Paul, just the one entry for each RCD on the test result sheet and just one test per RCD. You will see an entry for this on the test sheet at about 15:05 on the video. Good luck, Dave.

so for this Zs at DB you just measure the impedance at main switch Line-N L-E N-E?

@learnelectrics4402

3 жыл бұрын

Bledar, take a look at our video on the link below Testing Ze Zs Understand the Difference kzread.info/dash/bejne/l3yIwc9rnbXZZ9I.html

why are the RCD's leabelled (1/2)?

@learnelectrics4402

2 жыл бұрын

To help us identify which half of the board they control. Hope this helps.

On schedule of test results, are the maximum permitted Zs values taken from on site guide or BS7671? Thanks

@learnelectrics4402

2 жыл бұрын

From BS7671. However, if you write 80% at the top of the column you can enter measured maximums from the OSG. By doing this you are leyying anybody else that reads the schedule just what figures you are using. Hope this helps. Dave.

@addz91

2 жыл бұрын

@@learnelectrics4402 Perfect. Thank you for reply

Where in the OSG is the Maximum permitted Zs and Maximum measured Zs??

@learnelectrics4402

2 жыл бұрын

Have a look at the list of Appendices on page 5. They will point you to page 139. Only measured values in the OSG. Thanks for watching. Dave.

Where to find maximum permitted Zs (column 8)?

@learnelectrics4402

2 жыл бұрын

Thanks for watching Have a look at this video, Zs - TABULATED or MEASURED, click on the link below kzread.info/dash/bejne/i4qIl8ZqlJa3aMo.html Dave.

No spd in your example. Dare to be different lol.

@learnelectrics4402

Жыл бұрын

Thanks for watching, appreciated.