ring final

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  1. R

    Testing ring final circuits

    Morning All When testing end to end resistance of r1, r2 and rn. Is there a number you can multiply the r1 reading to check that the r2 reading is ok? For some reason I seem to remember you can. also, when tails enter a metal enclosure, they should enter through the same knockout/entry...
  2. K

    A1 ring final circuit

    Hi, Just browsing through OSG (living the dream!). Why is an A1 ring final circuit only protected by a 30/32A breaker when the max current carrying capacity of a 2.5 cable is 27A? (page 134 of OSG, column 6). Apologies in advance if I'm missing something very obvious. Thank you
  3. E

    Low IR on ring final.

    Hi chaps, Been searching thru posts but to no avail. I have one ring final with IR of approx 0.98 Mohm L-N , 1.48 Mohm L-E on 500v. I later found one appliance plugged in (dishwasher) but didnt have time to re test. The fcu above worktop was switched off for this applince but it was still...
  4. C

    Fault or not? Domestic Ring Final

    Had a Minor, Non Notifiable to do for a friend. Moving 2x sockets in the bedroom. After looking at it and from a response on here, took new legs up into the loft (it's a top floor flat) and joined in a 30A JB to the Incoming legs off the circuit. Came to test it, as was supplying a BS7671 MW...
  5. S

    Ring Final Circuits & Correction Factors

    Something I've wondered about for a while... If you had both legs of a RFC, in say T&E or singles, running in the same conduit, so basically touching, would you need to apply the appropriate correction factor for grouping?
    • Silly Sausage
    • Thread
    • circuit circuits conduit factor factors final ring ring final
    • Replies: 16
    • Forum: Australia
  6. S

    Need some help with ring final circuit please!!!

    Can somebody help me fully understand how to test a ring final circuit please!!!
  7. W

    no continuity on ring final neutrals

    Doing a PIR lately and found no continuity on one of the ring final neutral circuits. I am not familiar with fault finding and would appreciate any help and hints. IR test on the circuit passed.
  8. O

    Help IR Testing on a ring final circuit

    I am trying to do some individual circuit testing ahead of my 2391 practical, but I am having a problem with final ring circuits. Radial circuits aren't a problem, but when you look in all the guidance including GN3 it only deals with lighting circuits. Do you have to join all 4 live ends...
    • olsonn
    • Thread
    • circuit final ring ring final testing
    • Replies: 41
    • Forum: Australia
  9. S

    Ze and continuity on a ring final

    Hi all Just a phone call from a potential customer who is after a periodic but has mentioned equipment that cant be turned off. How would i do a proper 'Ze' and a continuity test to a ring final circuit? (if the equipment is on a ring final) I have been told if you cant turn a circuit off...
  10. C

    Help required with a Domestic Ring Final fault

    Evening Chaps... Had a 2nd call out today to a relative (let's say they're a client) for a fault on the downstairs Sockets. In a nutshell the downstairs sockets are tripping the RCD. Been there nearly all day & cannot fathom out what might be the cause? So, the board is a 16th MCB Only. There...
  11. P

    Spur from ring final circuit into shed 2 way DB

    Hi all, I need to run power to a shed but access to the main indorr DB is very awkward. I plan to do the following but would welcome your comments; The customer requires the following; Power to a 2 way board in the shed Power from the shed 2 way board to an IP66 FS (5A) for a pond pump...
    • Paul Downham
    • Thread
    • 2 way another circuit comments final power ring ring final shed spur
    • Replies: 5
    • Forum: Australia
  12. D

    ring final

    hi, was approached today by a spark that had done a board change, blah to cut a long story short........................ he said i had two ringmains one upstairs and one for downstairs. when i used my bell testers to check ends so i was sure i was connecting right ends togther back as rings in...
  13. P

    Fixed Equipment Spur - ring final circuit

    Now - up to about ten min's ago - i thought I had this install sussed- I'm a bit tired so I may just be misunderstanding some of the posts on this forum - I've also been out of the electrical game for about twenty years and just r*********** so need some support please - hence me checking and...
    • pmosely
    • Thread
    • cable circuit equipment final fixed point posts ring ring final spur
    • Replies: 13
    • Forum: Australia
  14. B

    Testing Ring final circuits

    Hi People So im testing my ring rinal circuit.... i do my end to end test..... I join incoming CPC to outgoing Line and vice versa...... I then go around my circuit with my tester noting the readings at each socket and record the highest reading..... Ok so this is my R1+R2 = 0.3 My...
  15. C

    500w PIR plugged into Ring Final circuit

    Customer has asked to install an external Halogen PIR on the outside of their garage. I explained I could take a FCU off the Socket & wire out to the fitting, (as I normally do) but am I overkilling it? If I down rate the fuse in a connected plug to 3A based on a 500w Lamp, this would give...
  16. P

    Broken ring final?

    Working in a 2 bed terrace and been asked to do a pir, the continuity on the downstairs ring final is confusing me and wondered if one of you chaps with a fresh pair of eyes could help me out. End to end continuity of Rn is open end to end of R2 is open but I'm getting a low fluctuating reading...
  17. S

    different Zs readings on a ring final?

    should'nt the Zs readings on a ring final be roughly the same at each outlet? the reason i ask is that i'm getting different readings (.08ohms-.45ohms) is this normal or could it be the tester. cheers
  18. J

    Easy Q. testing a spurred extension to a ring final circuit ?

    I have spurred out of the ring through a 3a FCU for an outside , how do i go about testing for a Minor Works Cert .Do i do the full RFC tests? or is there a quicker method ? The only tests are Earth continuity , IR , Zs and rcd i believe ....
  19. S

    Ring final fault - please help !

    I'm doing a PIR on my flat and I've come across a fault I can't work out. I'm getting a very low (about 0.1Meg Ohm) insulation resistance between Neutral and Line conductors on one of the ring circuits. However I'm not getting continuity between Line and Neutral and the MCB isn't tripping...
    • scanner
    • Thread
    • boiler fault final getting please ring ring final spurred there's thermostat
    • Replies: 9
    • Forum: Australia
  20. B

    ring final continuity

    While testing R1+R2 2.5/1.5 T&E on a 3 bed house Line and Neutral crossed over on opposite legs I recorded .34 ohms on all bar one of the sockets which gave a reading of .49 ohms. "A Spur!" everyone says. Now when deciding what to write on my form I think it goes .49x4=R1+R2 or would it be...

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