RING and RADIAL CIRCUITS. WHAT ARE THE DIFFERENCES.

[@learnelectrics4402]

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. kzbin.info/door/YaJQnpO4XAp0yCgqzMkmfA

[@daljitsingerkhani8776]

By a ring or radil circuit pls ?

[@daljitsingerkhani8776]

Hi dave how what is maxim geographically area covered

[@daljitsingerkhani8776]

I did 14 th edition at mid kent college they difine at tim around 70 square m for wrong or 50 for radial now I am out of touch so please ignore my ignorance istill talk in foot pound seconds

[@goldfish5606]

I really enjoyed watching how simple you made this topic. If only my lecturers could learn how to teach like this instead of always making things harder than they sound. Well done, please make more of these good videos.

[@learnelectrics4402]

Thank you for the really great feedback. There are more than 50 videos on our channel and lots more videos to come. If you think they are good, then please tell your college friends, the more that view our videos, the more we can make. Cheers. Dave.

[@everyhandletaken]

This non-electrician had no trouble understanding this, great video, thanks 👍🏻

[@learnelectrics4402]

Thanks Leigh. Must be doing something right then. Lots more to come. Dave.

[@CommonInvesting]

Wow. Well explained, subscribed! Thank you please keep them coming. Currently doing level 2 2365 and this has made my understanding MUCH easier. Legend

[@learnelectrics4402]

Thank you so much for your positive comments. They really are appreciated. We try our best to pass on over forty years of experience and help your understanding. It is a good trade to be in, stick with it and try to learn every day. Much more to follow. Bux

[@ariftanoli9768]

Please keep it concise simple and logical. You doing good job.

[@learnelectrics4402]

Thank you, I will. One video, one topic, easier to understand. Dave.

[@LionkingCMSL]

As a U.S. resident, it was enlightening to find out why you use ring circuits. In the U.S. we do not have ring circuits. And to you that think we only have 120VAC in our homes, we do have 240VAC, but split among 2 legs. The power is delivered by two 120VAC hot wires and a neutral wire. To get the 240VAC, the appliance needs to be connected to both hot wires and a safety ground.

[@learnelectrics4402]

Thank you for your comments. Yes, things are slightly different on the other side of the pond but generally, the basic electrics will follow similar rules. It's great to have some American support, spread the word, please do. Thanks for watching. Dave.

[@imranh5395]

So simple! So well-devised! So brilliant! Thank you, Learn Electrics! 🙏🏻

[@learnelectrics4402]

Thanks Imran, great feedback. Dave.

[@astranger448]

Non UK sparky here. I'm getting into awful rows with UK electricians here on the internet whenever they loudly sing the praise of the UK Electrical System. Since the whole world speaks English, many a non professional learns about the many safeties built into the UK plug and wants the same thing. Some of these plug safeties (the fuse and strict adherence to polarity among others) are there to counteract (among others) the risks inherent to a ring circuit, like a cable break. Sketching the historical context is also very valuable. This video is going to be a mighty good explainer to avoid all these awful rows therefore my thanks ;-)

[@learnelectrics4402]

Thanks for the great feedback and comments, really appreciated, and thanks for watching. Dave.

[@TC-uq1rc]

First class. Thanks for a clear explanation with no distracting music.

[@learnelectrics4402]

Thankyou so much for the positive comments, much appreciated. Dave.

[@E83-b8e]

Now that's how you explain things, clear, concise, and no faff. Many thanks for the knowledge share 🇬🇧👍

[@learnelectrics4402]

So glad you liked it. Thanks for the very positive comments. We try our best. Bux

[@middleagedpunk8923]

I will be completing the wiring on my new summerhouse tomorrow and this video was just what I needed - clear, concise yet simple to follow - just perfect for a layman like me. Thank you!

[@learnelectrics4402]

That is so good to hear. If you found it useful then that is job done, thank you for watching. Nice comments, appreciated, lots more videos to help you. Dave

[@robertjones3189]

I studied some electrical installation topics 37 years ago at college and I don't remember the historical context of the second world war and reducing copper use. Great video really well done.

[@learnelectrics4402]

Electrical history is fascinating. I've been reading things this week about the mid-war years. Thanks for watching. Dave.

[@learnelectrics4402]

Have a look at our video on Choosing breaker and cable sizes. Itwill guide you through the process. Dave

[@michaelcostello6991]

Great presentation and the history of ring circuits was very interesting along with their pros and cons. Thank you

[@learnelectrics4402]

Happy that you found it interesting Michael. It's sometimes good to learn a few facts about history. Thanks for your support, keep watching, lots to come. Dave.

[@vman2kay]

I always saw this as a positive for the ring circuit but this explanation really nails it. Thanks

[@learnelectrics4402]

Happy to have helped. Thanks for watching. Dave.

[@Chris-zc7my]

Absolutely fantastic information, demonstrating with simple diagrams how both systems work and explaining the differences and drawbacks. I’ve learned so much from your channel. I thank you.

[@learnelectrics4402]

You're very welcome Chris, Thanks for watching and for supporting the channel. Dave.

[@SJR275]

I've watched a few videos on ring and radial but this has actually been the best for explaining it so far.

[@learnelectrics4402]

Great feedback. Thank you very much. Dave.

[@Spanta.Hashmi]

absolutely help full, very simple and clear explanation. this particular information I just got it with your 10 minutes video I didn't get in One year electrical course . I really enjoyed, well don.

[@learnelectrics4402]

Great to hear that, the videos have done their job. Thanks for watching and spread the word about the channel. It all helps. Dave.

[@OverwhelmedMushroom]

Thank you! You really broke it down and made it easy to understand 🙂

[@learnelectrics4402]

Glad it was helpful, you are welcome.

[@iamrobfromcardiff5515]

Really clear, really helpful. Thank you so much for doing this.

[@learnelectrics4402]

Thanks for the positive comments. Trying our best. Watch this space.

[@warsameadam5572]

Finally I understand. Best video about ring and radial circuits on KZbin hands down . Thank you new sub. It would great idea to organise your channels video into categories by creating a playlist. Cheers.

[@learnelectrics4402]

Thanks for the sub and yes, playlists is definitely something I MUST do. Thanks for the nudge, appreciated. You can also search on the website for any keywords at LearnElectrics.com You will get a list of all our videos etc. that match your search. Thanks for watching. Dave.

[@dandearman2871]

Thank you for explaining this. This is something I've never seen here in the US.

[@learnelectrics4402]

Thanks Dan. Ring circuits are limited to just a few countries but it's always good to know. Dave.

[@adamcolville2057]

What an awesome little informative video ideal to show people who don’t know what the difference is between a ring and a Radial system and why we choose to use one or the other

[@learnelectrics4402]

Thanks for the great feedback Adam. Brilliant. dave.

[@yanalnaghawai1872]

Many thanks Dave, because in our country we don't use ring circuit and most of the videos i watched concentrate on ring circuit i was in a miss, but now after watching this video i clearly understand the whole thing,,, thanks a million 😊 🙏 wish you all the best 🙏🙏🙏🙏

[@learnelectrics4402]

Thanks for watching. Most countries don't use ring circuits and personally I'm in favour of everything being on radials. Glad the video helped and thanks for the support. Dave.

[@nathanairey7795]

You made it so simple, thank you so much

[@learnelectrics4402]

Thanks for the feedback. Lots more on the channel and on LearnElectrics.com

[@_muriithichris7431]

Great video, made it easy to understand

[@learnelectrics4402]

Glad it helped, thanks for watching.

[@jinkazama1974]

Thank you very much just started my 4 weeks of intense domestic electrician course. I will be visiting your channel quite often now 😊

[@learnelectrics4402]

Thanks for the support. I used to teach that course and a lot of these videos are based around questions it. Good luck. Lots more videos to come and use the website too. Dave.

[@mohamedbelfassi9479]

I just started learning in the field of electricity’s and this video helped me understand very quickly the difference. Thank you

[@learnelectrics4402]

Great comment Mohamed. Lots of videos to watch and lots more to come. Also the website. Keep learning, it really is a good trade to be in. Dave.

[@andrewsharp2575]

Excellent - clear and well presented. Thank you.

[@learnelectrics4402]

Thanks for the great feedback Andrew. Appreciated. Dave.

[@user-qi8tv2sj4m]

Super stuff. Please make more.

[@learnelectrics4402]

Thanks, lots more videos planned. Dave.

[@safwanrinu]

well explained ...!!! love frm india

[@learnelectrics4402]

Thank you Safwan, happy that you find them useful. Dave.

[@cal7110]

Excellent explanation thank you!

[@learnelectrics4402]

Thank you, appreciate your feedback. 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.

[@learnelectrics4402]

Glad it was helpful, keep learning.

[@owendavies5988]

Excellent slide show

[@learnelectrics4402]

Many thanks Owen, thanks for watching.

[@vanderpant2116]

Thank you for putting time into making a clear and concise video. Just liked and subbed 👍

[@learnelectrics4402]

Thank you for your positive response, much appreciated. Dave.

[@lawrencer25]

❤Fabulous video ❤ Thank you very much 🥰🥰🥰👍

[@learnelectrics4402]

Thank you too, thanks for watching. Dave.

[@jahboy699]

Thanks for the explanation

[@learnelectrics4402]

You're welcome, thank you for watching.

[@TheHarvuk]

Thanks for your excellent videos!

[@learnelectrics4402]

Thanks for your positive feedback. We try our best. Much appreciated and more to follow.

[@chrisbethell1188]

Excellent presentations on all your videos so far.

[@learnelectrics4402]

Thank you so much. Really appreciate your comments Chris.

[@joynatasha375]

Thank you! You made it seem so easy

[@learnelectrics4402]

Thank you Joy. Yes, it is easy. Stick with it, it's a great trade to be in. Dave.

[@kint5ugee]

excellently explained! Thank you!

[@learnelectrics4402]

Glad that you found it useful. Thank you for watching. 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...dl

[@learnelectrics4402]

Great feedback. Thanks.

[@mohammedafzal2990]

Very well done lovely.

[@learnelectrics4402]

Thank you Mohammed, great comments. Dave.

[@iqbalnuthoo1566]

Bravo, very well explained

[@learnelectrics4402]

Thank you Iqbal. Dave.

[@joshuadenness5920]

So informative thank you.

[@learnelectrics4402]

Glad it was helpful Joshua. Thanks for the great comment.

[@bobf2901]

Brilliant explanation, thx

[@learnelectrics4402]

Thanks for watching, much appreciated. Dave.

[@LondonUndergroundTubetrains]

Great explanation and really useful, thanks!

[@learnelectrics4402]

You're very welcome, glad it was helpful. Dave.

[@viktorhauk]

Great video - thanks for the clear explanations!

[@learnelectrics4402]

You're welcome. Glad you enjoyed the videos.

[@afrozalam4584]

Afroz ALAM form India. It's so beautiful video.

[@learnelectrics4402]

Great feedback, thank you. Much appreciated, thanks for watching. Lots more to come. Dave.

[@tuhinasad9976]

nicely explained ❤❤❤

[@learnelectrics4402]

Thanks for liking, appreciated, Dave.

[@terietaietawa6800]

Very interesting and informative video Pls can i use a 20A circuit breaker and wired with 2.5square mm for my ring circuit

[@learnelectrics4402]

Yes you can, no problem at all in using a 20A breaker. Take a look at this video on cables and breaker sizes and thanks for watching. kzbin.info/www/bejne/aZCnZ2hjaJerppo

[@martinearly3762]

brilliant video.

[@learnelectrics4402]

Many thanks and appreciated. Dave.

[@belaszigeti4850]

Extremely useful video with punctual explanation. Great way to recap the theory 👍 Thank you!

[@learnelectrics4402]

Thanks so much. Great feedback that makes it all worth while for us. Dave.

[@huffgsi83]

excellent video

[@learnelectrics4402]

Thank you very much Andy, appreciated, Dave.

[@joelgobeh7343]

Wonderful video

[@learnelectrics4402]

Many thanks Joel, appreciate your positive comment. Dave.

[@joelgobeh7343]

🙌🏾🙌🏾🙏🙏🙏

[@Zlinky111]

Loving your vids. They're great. 👍❤😊

[@learnelectrics4402]

Thank you.

[@WSMITHify]

If you are rewiring or wiring a new house choose radials, they are by far the best, only uk uses ring finals

[@learnelectrics4402]

Many sparkies are installing radial circuits now. There are a few other countries that use ring circuits. Thanks for watching and thanks for the support. Dave.

[@lylewatts6370]

Wow great video, I always wonder what you Brits used and why . Thanks for explaining the ring circuits to this Canadian Electrician.

[@learnelectrics4402]

Happy to help Lyle, that's what the channel is all about. We have just over 50 videos on here now and lots more to follow. Thanks. Dave.

[@tommorgan3981]

Really good video

[@learnelectrics4402]

Thank you Tom. Much appreciated comment. Dave.

[@azizullahkhan7888]

Thanks for uploading

[@learnelectrics4402]

Thank you for watching. Glad it was helpful. Dave.

[@richardwilson1795]

Well done good explanation 😊

[@learnelectrics4402]

Thanks Richard. If it helps, it's done it's job. Thanks for watching, appreciated. Dave.

[@azmanabdullah4412]

Well explained.....tq

[@learnelectrics4402]

Thank you Azman, appreciated, and thanks for watching. Dave.

[@ElectricEssenceLtd]

Great video and to the point

[@learnelectrics4402]

Thank you Aamir, appreciated. Dave

[@skehennarinky]

Great video. Thanks

[@learnelectrics4402]

Glad you enjoyed it. Lots more to come. Dave.

[@wassupjg]

great teacher 👍

[@learnelectrics4402]

Nice of you to say so, thank you.

[@davidemanuel1300]

Thank you very for the information Sir ❤️

[@learnelectrics4402]

Happy that you liked it. Lots more to come. Dave.

[@danielteyehuago1633]

Dave, please I want to ask a few questions 1. What is the number of socket outlet for a 20Amp. 2. What's the breaker rating for a ring circuit and how many socket outlet is allowed to be used

[@learnelectrics4402]

There is no proper answer to either question. It depends what the customer wants. 20A and 2 sockets might be ok for a bedroom, but it won't work for a kitchen. You can have 32A or 20A for a ring. 32A kitchen and 20A bedrooms. The 20A breaker gives you a bigger permitted Zs which is better for longer runs.

[@danielteyehuago1633]

@@learnelectrics4402 thanks for your response

[@danielteyehuago1633]

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

[@learnelectrics4402]

Very welcome Daniel.

[@ZsoltPal23092011]

Excellent, thank you!!!

[@learnelectrics4402]

Thank you Zsolt, excellent feedback, thanks for watching. Dave.

[@justintemp]

To add an extra sockets to a ring would you add fuse spur or cut the ring connection and add the new sockets into the ring?

[@learnelectrics4402]

Thanks for the question Justin. Take a look at this video on Extending Circuits it will explain for you. Thanks for watching. Dave. Click on this link kzbin.info/www/bejne/aZ6liYF4rNWrjtE

[@justintemp]

@@learnelectrics4402 thanks Dave.

[@AdnanCrash]

You make it like piece of cake thanks a lot

[@learnelectrics4402]

Thank you so much. Great feedback, makes it all worth while. Dave.

[@Bawdsey64]

Very informative, one question is a radial circuit the same as a spur?

[@learnelectrics4402]

A radial circuit is just a straight line circuit. A spur spurs OFF an existing ring circuit, but which second leg is the spur with a radial circuit.. Good question. Dave.

[@jamesmartin5277]

Thank you! Great video... Can you tell me is there a way an easy way to determine if a ring or radial spur is in use? Or do I need to pop the CU lid and trace the wires?

[@learnelectrics4402]

Continuity test at the CU is the only sure fire way. You can take a guess by breaker size and cable csa but testing is best. Thanks for watching. Dave.

[@AndrewCook7]

Hi Dave Why do we have a 32amp ring. Why was it settled on this rating. Is it to do with the 1.45 I2 value etc

[@learnelectrics4402]

Nothing to do with maths. It was just a value of current that a whole house might typically use at the sockets many years ago when there were few electrical goods. Once the fuse size became established, it stuck. Now we have several 32A circuits in a house.

[@AndrewCook7]

@@learnelectrics4402 thanks Dave

[@Harold_Shand]

Great explanation. I understand the reasons why ring circuits came about, but don't understand why they still seem to be commonly used today when, as you say, we have CU's with so many ways. Surely the risks posed by an undetected broken ring doesn't out weight the potential slight uplift in cost installing radials? That said, I'm not an electrician, so prepared to get shot down on this one. 😳

[@learnelectrics4402]

Personal choice at the end of the day Gary. Some people, including electricians, would you believe, still think that a socket circuit MUST be a 32amp ring. Why? Do you need 32 amps in the bedroom where there might be a TV, a computer and a bedside lamp, 5 amps max. Thanks for the comments, you are spot on, nothing to shoot you down about. And I do agree about the risks of a broken ring on a heavily loaded circuit. Thanks for watching. Dave.

[@ERVOZY]

very important video

[@learnelectrics4402]

Glad you think so and thanks for watching. Dave.

[@stevensmith4449]

If they have a good sense of smell they will suss a broken ring! V. Good style of teaching 👍

[@learnelectrics4402]

Your positive feedback appreciated. many thanks.

[@daljitsingerkhani8776]

Hi dave what's the maximum geographically area cover by a ring and radial circuit pls

[@learnelectrics4402]

Daljit, have a look in Appendix 15 of the Regs for Ring circuits floor area. Think about a radial circuit and what it is, just one long piece of wire - so its limit has to be the Zs limit. Take a look at our video on this subject on the link below. That should help. Thanks for asking. Dave. Cable length calculations kzbin.info/www/bejne/h6LCaoCEfZ2Lrrc

[@chrisbrowning360]

Great video

[@learnelectrics4402]

Thank you Chris, appreciated. Lots more to come. Bux

[@olitonottero7620]

very helpful , thank you

[@learnelectrics4402]

Thanks for the good feedback it is really appreciated. Dave

[@robertbutwell4272]

I've been trying to figure out if my house has a ring or radial circuit the sockets appear to use 2.5mm twin and earth, so I'm guessing it's a Ring then? Otherwise as you point out the copper core would have to be 4mm thick if it were a radial, correct? It's a rewired 1930s house with red/black twin and earth wire.

[@learnelectrics4402]

Robert, the only way to know is to test. Have a look at the video on the link below. Thanks for watching. kzbin.info/www/bejne/pJrYh5elpdafmdU

[@arthurcampos7290]

so, the cable thickness in a ring circuit is thinner because the current divide in those 2 cables, right?

[@learnelectrics4402]

Correct Arthur. thanks for watching.

[@simeonpalenzuela9241]

May I ask regarding ring circuit. Am I correct to say the hot line return to the breaker but the neutral wire does not return to the neutral bar?

[@learnelectrics4402]

Line, Neutral and Earth all return to their respective starting points in a ring circuit. Two Lines, Two Neutrals, Two Earths. Take a look at this video for more info. kzbin.info/www/bejne/Y4Gko6ipmrqZZpY Thanks for watching. Dave.

[@josephtgarton]

awesome video

[@learnelectrics4402]

Thankyou very much. Bux

[@largey2541]

Thank you very much!

[@learnelectrics4402]

You're very welcome. Thank you for watching and lots more to come.

[@lllCANDYMAANlll]

I was asked to install a socket in a factory today and came off of another pre installed socket. This original socket got its power from a 3 phase isolator. Is this allowed?

[@learnelectrics4402]

Nothing wrong with using a 3 phase isolator as a single phase isolator. usually more room inside them anyway. Good question. Dave.

[@abangirfanabangabdulhalil7532]

Just a question popped out from my mind is that, how many normal soscket outlet 13Amp can a 2.5mm radial cct. Is it 3 with 20Amps? Alsi how many also 13amp sso can ring 2.5mm safely installed? Is it 6?

[@learnelectrics4402]

There is no recommended number or maximum quoted in the Regulations. as long as the size of cable is correct for the size of fuse or breaker the circuit should be safe. Hope this helps

[@tomd5678]

Thank you . Very clrar

[@learnelectrics4402]

Thank you, appreciated.

[@mikeorr9533]

Brilliant

[@learnelectrics4402]

Thanks for the positive feedback Mike. Appreciated. Dave.

[@tomharris5777]

Thank You!!

[@learnelectrics4402]

You're welcome Tom, appreciated.

[@cygnus108]

Brill explanation

[@learnelectrics4402]

Thanks for the great feedback.

[@Crm-dm9ex]

Thanks for the video. the radial circuit is how the US is ran.

[@learnelectrics4402]

Thank you, nice comments. Yes, only about 5 countries around the world use Ring circuits. Lots more to come. Dave.

[@chrise202]

Suppose you have a main ring. And you spur from one of the sockets. Question: Can you create a smaller ring circuit from that spur ?

[@learnelectrics4402]

Good question and the answer depends on how you do it. One way is yes, the other a no. Take a look at these two videos and decide what it is you want to do. To view RADIAL SOCKET SPURS, click on the link below kzbin.info/www/bejne/e6WadKN7rKt4sMk To view SPUR ON RING CIRCUIT, click on the link below kzbin.info/www/bejne/jYjLiZtnqdagfJY Thanks for watching. Dave.

[@Wollmütze-l5w]

How interesting. I understood it. So the english ring circuit is dangerous over time and the cables could cause fire if the ring is interrupted. That is why the radial circuit is inherently safer but uses more copper. The rest of the world uses thus the radial approach.

[@learnelectrics4402]

Thanks for watching. Appreciated.

[@Wollmütze-l5w]

@@learnelectrics4402 Yes here from Southamerica. Actually we use here only the radial approach as far as I know. Most houses have several magnetic breakers for every cable one for example one cable and breaker for the air condition independently of each room, one for the light bulbs of each room, one breaker for the electrical shower apart, each bathroom each shower apart, one of the sockets of each room apart and so on. If there is a problem the breaker snaps down and you know you have to call the electrician. Additionally there is an main magnetic switch for each of the 3 phase power line and on top of that an general magnetic breaker. Then most have an Fi human protection breaker as we call it. Over here this country adapted together with Brazil and Southafrica the new swiss modified plug system recently developed by the international electric society. It is an variant of the swiss plugs but with the british shutter system. These plugs look like an rhombus but do not have an built in fuse like the british do. Supposedly these support Schuko type 16A currents or even more as I heard. Have not seen any implemented yet. Till date we use here the Euro plug combined with the US plug styles. We use them both. These take the german Konturenstecker (washing machines and such) as well but often the house cables are a bit to thin for such 10A drawings so we have to watch any plastic meltings on the sockets. The US and Euro plug system works as well and really there is no huge need to switch.

[@jonathanpilmore7140]

How many amps can 2.5mm twin+earth cable carry on a radial circuit? I assume they can carry up to 32 amps, but the 16 or 20 breaker would trip first? So in other words, the max isnt really seen in real world because the breaker trips way before the max can be reached? Is that right?

[@learnelectrics4402]

Have a look at the video on the link below about voltage drop and choosing cable sizes. So many factors affect cable size, how it's installed, length etc. Yes you are right, a properly installed circuit will see the MCB or fuse operate before the cable is damaged. Its easier to reset the breaker than it is to replace the wiring. kzbin.info/www/bejne/pIe9lnx8mqqqopI

[@jonathanpilmore7140]

@@learnelectrics4402 Thanks, I am only moving into my 1st house next month so will start doing some DIY'ing then, I know I need at least 1 socket spur adding into 2 bedrooms. Not sure if its ring or radial yet, I imagine voltage drop wouldn't really affect me if only messing with socket circuits?

[@ismailcheriyaparambath7740]

Thanks 🙏

[@learnelectrics4402]

You are very welcome Ismail, thanks for watching. Dave.

[@heronimousbrapson863]

Here in Canada, ring circuits are not used, thank goodness. Radial circuits have only ever been used.

[@learnelectrics4402]

Yes, same in many countries. Thanks for watching and for the input. Dave.

[@moeni9727]

Thank you!

[@learnelectrics4402]

You are very welcome. Thanks.

[@johnburns4017]

Many clearly do not understand what a final ring circuit is. The ultimate system is to have a radial circuit to _each socket outlet_ on its own fuse at the main panel - the optimum solution of course. This means you will need a _very large_ expensive main panel and lots of fuses/MCBs (one for each socket) in the main panel. Impractical of course. 🎊🎈 *BINGO* 🎊🎈 *A ring gives this by distributing the main panel around the house via a ring cable,* distributing the fuses from the main panel around the building to each socket. *The ring is a busbar.* This saves the vast expense of a plethora of radial cables back to the main panel and also a plethora of expensive fuses/MCB's/RCBO/AFDDs at a _very large_ expensive main panel and expensive labour to install. *a)* A ring uses less cable and gives a longer route *b)* No limit to sockets on the ring, but total is limited to typically 32A. *c)* A ring uses less copper for a given load/area. *d)* Rings rarely have voltage drop as it is fed from both ends. *e)* Rings have lower impedance, less volt drop is less waste! They are more efficient. *f)* No single point of failure for the protective earth. *g)* If you are covering all rooms in one floor then a ring can do it. *h)* An appliance and its flexible cable may have a fuse sized to its rating inside its plug. *1.* Ring final 2.5mm cable, 32A B-curve MCB, length *106m* on TN-C-S. *2.* Ring final 4mm cable, 32A B-curve MCB, length *171m.* *3.* Radial final 2.5mm cable, 25A B-curve MCB, length *33m.* *4.* Radial final circuit, 4mm cable, 32A B-curve MCB, length *43m.* If a ring is in 4mm cable protected by a 32A MCB/RCBO, then no problems if the cable is broken - which is a very rare thing. The ring can be partially 4mm to heavy current appliance sockets one one leg, and 2.5mm for the rest The ring final circuit is safe, simple, and highly effective after 80 years of use. The introduction of MCBs/RCBOs/RCDs/AFDDs, and screwless Wagos on the ring taking the load, has made the ring even safer.

[@learnelectrics4402]

Thanks for your input John, appreciated.

[@reedy8585]

Nice video, you need to be aware of how badly the ability of the wire to handle current is reduced by modern insulation. it's is as much as half

[@learnelectrics4402]

Absolutely correct, there is a huge difference between a cable looking big enough and actually being the right size. Take a look at this video - Matching cable sizes - on this link kzbin.info/www/bejne/jKW3hp6LpbZgiMU Cheers, Dave