Automatic Disconnection of Supply (ADS) Explained. IP Ratings, Exposed & Extraneous Conductive Parts
HTML-код
- Опубликовано: 31 май 2024
- Student training aid on the requirements for protection against electric shock ADS (automatic disconnection of supply). Video includes sizes of protective bonding conductors and earthing conductors within a 100 amp single phase domestic installation. Also covered additional protection, 0.4 and 5 seconds disconnection times for TN-S and TN-C-S earthing systems, RCD's rated at 30mA and below, IP ratings and exposed and extraneous conductive parts.
What is ADS... ADS explained
== 🕐 Time Stamps - Cut to the action 🕕 ==
00:00 - ADS automatic Disconnection of supply
01:07 - Size of the cut out fuse
01:32 - Meter tails
01:46 - Main earthing terminal (MET)
03:59 - Safety electrical connection do not remove
06:05 - Why do we bond the gas and water pipes
07:09 - IP ratings of electrical enclosures
08:59 - Circuit breaker sizes
11:14 - Exposed conduit parts
12:35 - Additional protection with an RCD
Videos are training aids for City and Guilds (C and G) and EAL courses Level 1, 2, 3 plus AM2, AM2S and AM2E.
You can follow me day by day on Facebook, Instagram, Twitter and TikTok lookout for "GSH Electrical”.
▶️ FACEBOOK / gshelectrical
▶️ INSTAGRAM / brihzmraygdtmjmdb9lunq...
▶️ TWITTER / gsh_electrical
▶️ TikTok vm.tiktok.com/ZMRBLFdhe/
#GSHElectrical #Electricaltrainingvideos
Absolutely brilliant. You, Joe, John Ward, Learn Electrics, and others etc. do such a great service to the industry. Thank you so very much.
Massive thanks we do try 👍🏻
I’m an apprentice who’s been binge watching your videos, and you make it very clear and easy to understand, thank you for all your help!
No matter how much I think I know every time I watch one of your Video's I always learn something new, or it just makes my understanding of the subject matter even clearer! Thanks Garry
Thanks Steve 👍
The best spark tutor around 👍
Thanks for the support 👍
Very good and thorough explanation from one of the best in this field [Gary]. If the classroom lessons would be available as well online [at cost/item or membership levels], then this would be the most comprehensive and detailed first step content for anyone considering to become a professional electrician. Well Done Gary.
One of the clearest and most in depth videos you’ll get. Excellently put together by Gaz. Extremely helpful. Many thanks
Thanks 👍🏻
I will never get tired of watching your vids m8, just really good stuff
Your videos are brilliant, I have learnt a lot from your videos.
Massive thanks 👍🏻
Total legend. Answered many of the questions in my head. Thank you sir
Very clear and super interesting...
Thanks 👍
@@GSHElectrical wouldn't know to any online courses? Can I self study and just sit the City of Guilds Exams?
Fantastic presentation. Great delivery, easy to follow and remember. I very much enjoy the additional info about possible situations that may happen in the real world as an explanation for using a particular method of installation or an item to be used. Best schooling I have ever received. Thank you.
Thanks for the wonderful comment. Gaz 👍
This is just brilliant. Perfectly delivered!
Excellent. Many thanks. So useful.
Thanks for commenting and watching 👍🏻
Great video Gary. Took me 4 months to under ADS
Thanks for the support. Gaz 👍
We recently had a "Smart meter" installed. The service head fuse was originally 100A. He changed this to a 60A fuse. So now, our highest MCB is for the shower rated 40A, and not within the 2:1 ratio you mentioned. Also worth noting that in real world situations, you can't verify the size of fuse simply based on 100A writing on the service head casing, my example being a case in point, and legally you can't remove it to check it either.
+Lee Greveson
Good points. Often the supply authorities are downgrading cutout fuses because household demand is falling due to energy efficiency improvements within the home. You would need to check the current curves in the Regs to prove discrimination the rule of thumb is 2:1 and it can be less. The supply authorities will allow you to pull the cutout fuse if you call them but normal will charge you the re-seal it or require you to pay in advance to have an isolator placed in the mains tails. My videos are for learners in there early stages of training. Thanks and all the best GSH Electrical
Amazing thankyou
I m NIC approved Contractor for 7 years this video was very good
Thanks for the wonderful comment and support. Gaz 👍😁
GSH Electrical
thanks for your reply and good lecture
Thx Garry, you make my life easy.
Quality video this bud! Depth is great and easy to follow!
+Joel Hatswell
Thanks once again for your kind words GSH Electrical
Great video, lots of important information clearly explained!
Thanks mate 👍
great vid Gary, thanks again
Thanks for the support Gaz
proper infor right there !
+Dylan T
Thanks for the support GSH Electrical
Thank you very much for your video I really appreciate it.. Will you do some video for three phase sometime? Thank you again
MY cutout has a black looking connector block marked PME to which three CPC/Earth connectors enter. Two are G/Y 10mm cables of which one goes inside the Main cutout with the fuse in it and the other goes to the CU. The other connection into the PME block is braided copper which is strap bonded to the lead outer sheath of the DNO's incoming cable. I suspect I have a TN-S supply but am a little confused as to why their is a 10mm CPC going into the cutout as this would be more typical of a TN-C-S supply. Do you have any advice on why there is the CPC going into the cutout. House was built in the late 1920's.
Great video, could you please do one on potential difference
Good stuff......
+ningis21
Hi thanks for the kind words. Click the link in any of my descriptions and you can follow me on Facebook. All the best GSH Electrical
What calculation do you use to see if the voltage does not exceed the 50V?
Can you clarify the function of the earth rod? My understanding is that it’s purpose is to guarantee that any metallic item in contact with the general mass of earth has the exact same potential.
Hello Gary, enjoyed your informative video.
Could or would you do one on terminating 25mm split concentric please?
Many thanks D
Very interesting and informative.
As well as clear and precise explanation, on thing I have never understood is why is the main earth and the bonding conductors 16mm2 and 10mm2 but the circuit earth conductors are considerably smaller ie 1mm2 for a 1.5 mm2 FT&E and 1.5mm2 for 2.5mm2 FT&E? Please clarify.
Fantastic video as always Gaz 👍👍👍❤️
Garry can you show us what would happen if a live neutral dead short happens a circuit with an RCD only and no MCB would the RCD blow up. Cheers
Can you tell me the reason for a permanent link in the cutout
So what a reliable fuse bs en3036 be counted as ads or would it not, not sure about this one?
Megger have that function pretest like Fluke ??
If ZS readings don’t meet the disconnection times is that ok if you have an RCD installed for additional protection
Hi. You will have to do a loop test between line and neutral to confirm that impedance is not above the max Zs. I cover in part in this video
ruclips.net/video/Z1VW93u_5pU/видео.html
Thanks for commenting and watching.
All the best GSH Electrical
Ive watched the video. Are the max zs values for LN the same as LE
I thought IP stood for “Ingress protection”?
Gareth Warden me too 🤔
It does.
The IP Code, or Ingress Protection code, IEC standard 60529, sometimes interpreted as International Protection marking, classifies and rates the degree of protection provided by mechanical casings and electrical enclosures against intrusion, dust, accidental contact, and water. It is published by the International Electrotechnical Commission (IEC). The equivalent European standard is EN 60529.
Internation Protection.
👍🏼👍🏼
Keep working hard 👍
IP doesn’t stand for “Index of Protection” or “International Protection” it stands for “Ingress Protection” and is a rating of an object/product/installations ability to withstand the Ingress of solid particles and liquids/water.
What about metal in door frames for lock mechanism ? Is that grounded
No 👍🏻
@@GSHElectrical Ok. Just i was able to measure 230v between live and metal on door frame
Thought TNCS should not use rcd
Sorry just nit picking, you say the cpc is serving no purpose in the plastic roses and switches but it is, it’s continuing the earth to other accessories and is a test point. Just saying
Hi. If the system employs fully installed accessories then the cpc is not required however it’s in place in case an accessory is changed for an exposed conductive part. Thanks GSH Electrical
GSH Electrical
And it is in place for testing purposes
I’m an apprentice who’s been binge watching your videos, and you make it very clear and easy to understand, thank you for all your help!