Tests for Ring Final Circuits

Tests for ring final circuits to confirm they are actually a ring, there are no unwanted connections between points on the ring, and all of the sockets outlets on the ring are connected properly with the correct polarity.

[babangidaciroma]

By far one of the greatest teacher on YouTube. Keep the good work John and you shall be remembered for your good work even after you're gone

[james]

Great teaching. I often use a similar method; however, you have to be 100% on top of your subject, which you certainly are! Great work from a seasoned teacher.

[Simon_Portillo]

Another excellent explanation. You are a very clear communicator John! That video has summed up why radials are the way forward :-)

[MrSteveykk]

I'm doing a work from home course for electrical installations and the book's jargon and lack of diagrams have made things extremely hard to learn. Thanks to this video everything has come into focus. Thanks so much!

[ursamajor]

Crystal clear as usual. If all my teachers were like JW when I was at school, I'd have left with 10 A Levels (That's 10 x A levels - not 10 amp levels 😅)
MANY thanks 👍

[train]

An absolutely superb video john.very methodical, very clear, and very well presented.
Well done sir.keep up the great videos.thankyou loads Steve.

[tonyp]

Thank you John I understand your explanation more easy than in college. Cheers !

[harrycallaghan]

Love John's explanations. Somewhat therapeutic and educative at the same time. Cheers John.

[emanueleleschiera]

Really thanks for the best explaination ever! You get directely at the point without miss nothing on a practice way, weel done!

[bdawinton]

I work in Bermud that follows the US codes these videos are facination to see the differences.

[sbusweb]

+John Ward
Given the fun wih USB-sockest providing a loading between L-N ... I wonder if these mess up L-N crossed resistance tests?.
If so, what about doing the tests as CPC-Neutral crossed, and then, separately CPC-Line crossed -- would this still provide all the appropriate test coverage so far as continuity and polarity and resistive-joints are concerned, but avoid complications of L-N loads applied? [I appreciate a full voltage L-N IR test still ould'nt be possible].

[hugohew]

Hi John i will going to take my test soon would you able to guide " What is the design consideration in sizing a final circuit in an electrical installation? " what does it mean "in sizing" MCB rate, Cable size or DB

[fattoamanowoodwork]

Brilliant as always. Love your explanations, clear, comprehensive and always on point. Thank you.

[DrGreenGiant]

Could you please cover what you do if you have one of these double gang with USB. Seems to skew readings somewhat

[uliman]

Thank you John for your great tutorial video's...  Although here in South Africa it is not common to find ring circuits, they do exist as a lot of electricians from the UK over the years installed them at some point... I have come across it in a house that I owned a couple of years ago... needless to say I changed it to a radial circuit as it did not make any sense to me at the time... only to learn after why it was done that way...I agree with you that it should not be common practice to do it in the first place...

[trueriver]

Question: you are clear that you don't like ring circuits. So on a radial, how do you test each socket for the problems which are identified by these ring circuit tests??

It's always seemed to me that these tests are an advantage to ring circuits, rather than a problem. If I'm missing something here, please enlighten me

[bilalislam]

When approximating the values for the L-E, instead of adding them together and dividing them by 4
can we not implement the formula for resistance for parallel paths as they are in parallel, so (1/r1 +1/r2) which gives us an approximation ~0.281 ohmes?
Thanks

[trueriver]

At 23:00 surely as you go round testing, if you found inf on test 2, you would fix that before proceeding? I can't imagine starting a second test knowing I already had a problem.

That means you are checking for L reversed with either N or E, or L or N not connected, or switch off.

Probably I'd check the switch first as it's an easy check and easy to rectify

[awinbisa]

Thanks for your amazing videos. Did you ever consider reading the shipping forecast? I love your style.

[fredbloggs]

Hi John. Not sure I agree with your comment about the "undesirable" additional path making a sort of figure of 8 in the centre leading to overload conditions. If the original outer ring is rated correctly, then adding any additional connections between two sockets cam only make it better (ie more current sharing) not worse.