Thank you very much Professor. Your lessons are simply perfect. If I was in UK I'd surely support all of your sponsors.

Probably the best explanation on KZfaq. Very pedagogical.

It's one in a million video! Very educative and an up to date information everyone in the electrical field can appreciate. Thumbs up!

This video has open my eyes in terms of the Energy Audit services my company offers. Thank you for your help.

Fantanstic tutorial. Logical, thorough and clear. Thanks!

Thank you Sir, you're the best. We were using this device at work on an aircraft testing some stuff.I came here looking for some second opinion type of explanation because I didn't understand it quite well but you sir gave me everything I needed about Insulation Testers. Now I'm gonna work with it with confidence.MegaLove from 🇿🇦.

Brilliant video Martin. Had to laugh because since Christmas we have had trouble with our electrics tripping out the main RCD on our consumer unit every time it rained. After extensive testing by an electrician, he found that the central boiler had a low IR and that rain water was coming in through the flue and causing the electrics to become damp. Your video has explained it all. Can't thank you enough.

Thank you, excellent video, information that's vital to your health.

I really enjoy watching your videos Martin , you seem to be able to get your tutorial across very calmly and very informatively , Thank you for taking the time to make these , they are a great help .

Amazing explanation. Thanks a lot for this.

Great find, I just subscribed. Thank you so much very informative. Love the explanations with the visual and demonstrations.

wonderful tutorial . very informative and explicit and easy to follow

Always FANTASTIC tutorials!!!!

Great video. I had no idea about the safety precautions you should take with these types of testing meters. Thanks for the safety tips.

Damn this is pure GOLD. Really impressed by your teachings, thanks for sharing your knowledge! I'm probably going to be surfing your vids for some time in the future, can't wait!

exemplary tutorial. clear and concise. the analogy to water pressure serves the purpose of the tutorial very well.

Very very informative video, thanks alot for posting this. Keep posting videos like this in future.

You are awesome! Thanks for the tutorial. Better than my test and tag teacher years ago!👍👍👍cheers from Australia

Fantastic video there mate. Very clear, well spoken... Thank you for your time.

Very good teaching much appreciated. Thanks

Good Video, as usual. Very useful tester for sure.

Great tutorial. Especially, appreciate the safety perspective.

WOW WOW WOW. THIS VIDEO IS AMAZING, I LEARNED SO MUCH. GREAT VIDEO, PLEASE MAKE JUST LIKE THESE!!

Never knew there was leakage in insulation.I just though it was shorted or not shorted.Good stuff.I work on Air Conditioners and always have circuit breakers tripping.I will use a good tool for resistance testing.

Very interesting! Great video! Thanks Martin.

Awesome video. Thanks for doing this, Martin!

How can you check insulation readings on the kettle, if you measure between live and neutral you should get a very low resistance reading and not a high or infinity reading because you are passing current through the heating element? In the case of light fixtures etc, you would remove the lamp/bulb but for appliances such as kettles, driers, etc, how do you check unless you disconnect the heating elements?

Thank u very much for the video it's really helpful

Thank you very much sir....expect more videos from you

Thank you, now I have a new perspective...

Great video, concise, informative and well presented. Have you reviewed any handheld oscilloscopes?

Thank you very much, I benefited a lot from you.

Hi Martin, I always use 5kV insulated silicone (rubber certified) gloves when handling my HV test gear, they are a bit thick, but I don't leave anything to chance... The mininium voltage I test on is 1.5kV and I go up to 3kV. This is for insulation testing on audio and power transformers. Cheers!

good way of tutorial to educate the public.

Great explanation for educating elecrics

Excellent video , thank you so much.

What a very nice tutorial video 2 thumbs up martin.

superbly well explained

Great video! Thanks for making it. I'm an Electronics Tech who was thinking about buying a Megger tester. I was just wondering if you could clear something up. At 14:56 in, you said you'd like to see an additional mega-ohm for each additional 1000V put on the line. But your board says 1000 Ohms, which is a kilo-Ohm, not a mega-ohm. So for 2000 Volts, should I see 2 mega-ohms or 1001000 ohms? Or was it supposed to be 1000 Ohms for each additional VOLT you added above 1000 Volts (making it 2 mega-ohms for 2000 volt input)? Thanks for any additional info on this you can offer. All the best! Appreciate the help!

thank you sir for your good teaching...

Excellent Vidio, well done and clear. Thanks Paul South Africa

Hello! Very helpful video! Thanka a lot. Just a notice: At video 15.10 you mention 1000 Ω as 1 ΜΩ. Isn't it 1 kΩ?

Thanks. Very helpful and easy to understand.

GREAT TEACHER INDEED. THANK YOU. REGARDS.

I am also not wary happy about high voltage, I have some tricks I use, maybe you find them useful. When I have done as you demonstrates I do always put a single stranded wire from hot to neutral so if anyone turns on the power it will shorten before any power can reach me. If I can't do that, I do often run a long wire from hot to the nearest outlet with earth, again to prevent me getting a schock! Thanks for your fantastic video by the way:-)

very nice explanation,,,thank you very much for this video tutorial.

wonderful my friend great job

Great job again like always

Thanks for the very informative video!

Amazing video. Thanks a lot

I love you. Thank you for your help.

A crystal clear explained

Excellent video! Really helpful!

May i ask, is Insulation Resistance testing necessary for 12V equipment?

thank you for sharing good job ... keep going

can we test Ac motor disassembled, I mean the rotor and stator are separated, test only the stator thanks

BRILLIANT..!!! Thanks for sharing your knowledge

Thank you for good explanation ,great ;)

Thank u very useful for this video.

VERY EDUCATIVE. THANK YOU. REGARDS

Thanks, really helpful!

Hi John! Im just revising this nice vid!

Just in the final part of the video you mention about grounding the conductor to make sure it's discharged and to not upset the readings. Does you do that before or after the insulation resistance testing ? What I usually do, it's to touch the cable ends with a piece of insulated wire to discharge them.

Great video very educational my college tutor shocked me deliberately with a megger insulation test but I didn't harm me so just wondering is it therfore safe to be shocked by the megger meter or is it the potential risk of being shocked by the circuit you are working on when you say about the dangers? Thanks

that was a very nice teaching

Cheers!!!!Good explantion

Hi great video. 1 question please. So do you actually go around the plant, factory, house or building, and disconnect all the equipment like pc's, toasters, bulbs, burglar alarms, etc. surely you will miss something, and then run the risk of blowing up something. pls could u explain

Great explanation. Thanks

Do you have a video explaining how to test for Double Insulated appliances? Thank you

Good video tanks :D

Thanks alot. Very helpful.

Hi thank you , can you show how to see if your boiler is faulty or what part is not working right.

Great explanation

this helped a lot .... thanks

Amazing. Thank you so much

great video, good information. here in the UK us electricians are not allowed to use a non contact volt probe or a multi-meter to test if the installation is isolated. we have to use a voltage indicator the is approved to GS38, then we have to prove the indicator with a known source or a proving unit. i personally like my fluke T150, but a lot of the other guys i know like to use the martindale test lamps.

I am a biomed engineer I do a lot of electrical safety on medical devices adhering to iec 62353 these videos are great very helpful. Any good books you can recommend?

hi what reading would indicate a open circuit? and what reading will indicate a short circuit?

very nice video..we can learn something from it..

thank you very much, your videos have always been helpful. that's a fluke 1587 you are showcasing? I am bout to buy one. I was wondering what is the difference between 1587 and 1507?

On earth testing you should put 10 Amps thru, which will burn out (blow) a flimsy conductor. I've seen earth terminals to equipment body with just 2 of the 18 strand copper cable in actual contact. Good video thanks.

20:30 What's the insulation resistance of a pair of rubber gloves? (excluding the rather expensive high voltage protection gloves)

great info and the coffee pot is the most important tool. B*) .

can you make a video about Hi pot testing a DUT device under test and why DUT has AC and DC leakage current when disconnecting the earth ground wire?

Bài Hát: Phôi Pha Ca Sĩ: Khánh Ly Ôm lòng đêm Nhìn vầng trăng mới về Nhớ chân giang hồ Ôi phù du Từng tuổi xuân đã già Một ngày kia đến bờ Đời người như gió qua Không còn ai Đường về ôi quá dài Những đêm xa người Chén rượu cay Một đời tôi uống hoài Trả lại từng tin vui Cho nhân gian chờ đợi Về ngồi trong những ngày Nhìn từng hôm nắng ngời Nhìn từng khi mưa bay Có những ai xa đời quay về lại Về lại nơi cuối trời Làm mây trôi Thôi về đi Đường trần đâu có gì Tóc xanh mấy mùa Có nhiều khi Từ vườn khuya bước về Bàn chân ai rất nhẹ Tựa hồn những năm xưa Ôm lòng đêm Nhìn vầng trăng mới về Nhớ chân giang hồ Ôi phù du Từng tuổi xuân đã già Một ngày kia đến bờ Đời người như gió qua Không còn ai Đường về ôi quá dài Những đêm xa người Chén rượu cay Một đời tôi uống hoài Trả lại từng tin vui Cho nhân gian chờ đợi Về ngồi trong những ngày Nhìn từng hôm nắng ngời Nhìn từng khi mưa bay Có những ai xa đời quay về lại Về lại nơi cuối trời Làm mây trôi Thôi về đi Đường trần đâu có gì Tóc xanh mấy mùa Có nhiều khi Từ vườn khuya bước về Bàn chân ai rất nhẹ Tựa hồn những năm xưa ... Ca Sĩ: Khánh Ly Ôm lòng đêm Nhìn vầng trăng mới về Nhớ chân giang hồ Ôi phù du Từng tuổi xuân đã già Một ngày kia đến bờ Đời người như gió qua Không còn ai Đường về ôi quá dài Những đêm xa người Chén rượu cay Một đời tôi uống hoài Trả lại từng tin vui Cho nhân gian chờ đợi Về ngồi trong những ngày Nhìn từng hôm nắng ngời Nhìn từng khi mưa bay Có những ai xa đời quay về lại Về lại nơi cuối trời Làm mây trôi Thôi về đi Đường trần đâu có gì Tóc xanh mấy mùa Có nhiều khi Từ vườn khuya bước về Bàn chân ai rất nhẹ Tựa hồn những năm xưa Ôm lòng đêm Nhìn vầng trăng mới về Nhớ chân giang hồ Ôi phù du Từng tuổi xuân đã già Một ngày kia đến bờ Đời người như gió qua Không còn ai Đường về ôi quá dài Những đêm xa người Chén rượu cay Một đời tôi uống hoài Trả lại từng tin vui Cho nhân gian chờ đợi Về ngồi trong những ngày Nhìn từng hôm nắng ngời Nhìn từng khi mưa bay Có những ai xa đời quay về lại Về lại nơi cuối trời Làm mây trôi Thôi về đi Đường trần đâu có gì Tóc xanh mấy mùa Có nhiều khi Từ vườn khuya bước về Bàn chân ai rất nhẹ Tựa hồn những năm xưa ... Ca Sĩ: Khánh Ly Ôm lòng đêm Nhìn vầng trăng mới về Nhớ chân giang hồ Ôi phù du Từng tuổi xuân đã già Một ngày kia đến bờ Đời người như gió qua Không còn ai Đường về ôi quá dài Những đêm xa người Chén rượu cay Một đời tôi uống hoài Trả lại từng tin vui Cho nhân gian chờ đợi Về ngồi trong những ngày Nhìn từng hôm nắng ngời Nhìn từng khi mưa bay Có những ai xa đời quay về lại Về lại nơi cuối trời Làm mây trôi Thôi về đi Đường trần đâu có gì Tóc xanh mấy mùa Có nhiều khi Từ vườn khuya bước về Bàn chân ai rất nhẹ Tựa hồn những năm xưa Ôm lòng đêm Nhìn vầng trăng mới về Nhớ chân giang hồ Ôi phù du Từng tuổi xuân đã già Một ngày kia đến bờ Đời người như gió qua Không còn ai Đường về ôi quá dài Những đêm xa người Chén rượu cay Một đời tôi uống hoài Trả lại từng tin vui Cho nhân gian chờ đợi Về ngồi trong những ngày Nhìn từng hôm nắng ngời Nhìn từng khi mưa bay Có những ai xa đời quay về lại Về lại nơi cuối trời Làm mây trôi Thôi về đi Đường trần đâu có gì Tóc xanh mấy mùa Có nhiều khi Từ vườn khuya bước về Bàn chân ai rất nhẹ Tựa hồn những năm xưa ...nj6

what about the filament? would it read the same as line and neutral to ground and neutral to line?

Insulation resistance test or pat test is carried out at 250 volts Insulation resistance test on ring final circuit or lighting circuit is carried out at 500 valts With all loads removed from circuit and all switches in the on pasiton, portable appliances are unplugged when pat tested

I shocked myself with a Megger once. It was kinda funny.

merci pour la video sa était très fructueuse

Is there an example which shows testing a wire with faulty insulation such as one damaged by a surge?

The resolution of the 1587 is only 100Kohm (0.1Mohm). Would it not be smarter to check that the earth pin on the plug is connected to the metal body of the kettle with a regular multimeter? Then you know for sure that you have a low impedance connection and not 50Kohm or something like that.

VERY VERY VERY GOOD VIDEO

What happens when doing insulation resistance test on a stove and oven heating element. Do you have to disconnect the power cord from the appliance

at 22:28 you tested isolation between Line and Neutral of an appliance used to warm the water. I expect to see a SMALL resistance out of this test, since it is a heater, but you show 2.2 GOhm. Could you explain this discrepancy, please ?

Great video thanks

A good one, Thank you

Really useful video

Great video!

I'm just 15 minutes in and I heard you on two separate occasions call 1M (mega ohm) a "thousand ohms" 1 mega ohm is 1 million ohms. 1 kilo ohm is 1,000 ohms, or am I missing something here completely?

So Wire check here is for safety--the process is to start with a known specification--for example and outlet of ___. when you seem to get light blinking or electrical faults the electricity is usually like the connection arc....the light flickers....so you start to check sometimes the appliance is what you think...often wiring has a duration of life before it disintegrates like powder..for most of us it isn't a problem---most of the world is like India-New York etc..where people buy and sell propertiess with out concern.....So their is always a factor when buying property that you check the system---the have a light plug you plug into the socket and it tells you if the circuit is safe..there are many EASY testers for the common person at the local store to test a outlets in your house for variable reasons and inexpensive to have ( for the common person)....So having said that.....the measurement is constant based on the fuse again....even with a variable--thats why A lot of car items have fuses in line...NOW SOME HOUSE OUTLETS HAVE fuses built in THE RED little button you push it and it resets your outlet box.......in case you over load etc...same for little tiny fuses in cars.....SO having said that I was wondering how the electrical V became more if their were only house fuse box? I sort of lost my place sorry...I don't mean to laugh ...I'm trying to understand thats all....I like all your electrical measurments and gauges and so thank you ......resistance has an ARC ? I thought you could solve it by specifications of the fuse box for current rateing? im not sure...thanks again...