final

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  1. J

    Low Insulation resistance readings when connecting final socket on ring?

    Hello All wondering if anyone could shed some light on a problem i have with my IR readings. I recently rewired a house.. took care pulling cables in etc . finished 1st fix, checked cables by looping ring main in connector blocks and doing continuity and IR test . continuity was ok, IR read...
    • Justintime
    • Thread
    • conductors connecting fault final insulation insulation resistance readings resistance ring socket sockets testing
    • Replies: 16
    • Forum: UK Electrical Forum
  2. A

    ryefield board confusion

    i am only a second year apprentice so please bear this in mind if this question comes across as stupid.. i am currently working on a site where one property (old pub) is being converted into 8 seperate flats, and at the minute we are working on the power distrobution to each individual flat...
  3. Soulsurfer

    Concerning R1 + R2 and r1,rn,r2 ring final results ?

    Hi all, Can anyone shed any light on some strange really low readings on a ring final circuit I've just 2nd fixed including replacing some legs as the IR was bad in places on old cabling before. Thought it could be my MFT batteries going and therefore giving possibility of silly results but...
  4. Peter Monfort

    Ring final circuit question

    When you do the continuity test on a ring final circuit and you have to connect L1 to N2 and vice versa, this assumes you know which L cable is the incoming or outgoing. I understand that if you connect L1 to N1 and vice versa the ohm readings rise then fall as you go round the ring circuit...
  5. B

    Can you calculate ring final conductors if you have a measured R1 + R2?

    Hello there everyone, I've dead tested some ring mains on a job recently but unfortunately I didn't do my measured end to ends. The circuits only have two spurs on each. I have my R1 + R2's, it was wired in 4mm T and E so the earth is obviously 1.5mm. For example, if one circuit measured...
  6. D

    Final Ring Test during EICR

    Guys non domestic stuff here but is it true that you don't carry out ring final tests on EICR. Or is it that you don't have to and done do it as a matter of course anyway or do you charge extra for doing stuff not needed. I'm of the opinion of its not much extra to do it then I'll just do it...
    • Dizzy_Maskell
    • Thread
    • circuit don't during eicr final ring ring test test tests
    • Replies: 26
    • Forum: UK Electrical Forum
  7. M

    B type breakers with in line UPS

    Hi I'm hoping that someone can help. I am adapting some circuits which are supplied via an in line ups. At present, the ups supplies a 72 way db and the final circuits are supplied from the DB. This is a laboratory research environment and it is expensive (about £20k a time) when they...
  8. Paul.M

    Super League Grand Final

    Did any one else go? Is there any upset Wigan fans this morning lol. Any Rhinos fans with a stinking hangover :wacko: What a great game, one for the history books with Leeds winning all 3 competitions. All we have to do now is beat the Four Nations Champions New Zealand in a couple of weeks...
  9. L

    Volt drop question

    Hi I've got a question regarding volt drop. When calculating volt drop to a 3 phase distribution board do I use 230v (11.5v) or 400v (20v) The board I'm attempting to put a cable to is 75 meters away. Design current 100A From TABLE 4D4A Cable selected = 25 mm² For 25 mm²: mV/A/m 1.75 for 230v...
  10. 8

    Domestic: 20A DP switches and ring final circuits??

    Hi all :). Seeing alot of cases where I have seen 20A DP switches in a kitchen (for example) each feeding a radial 2.5t&e to each white goods appilance or similar, and the 20A DP switch primarys are fed from the 32A kitchen ring final circuits - Is this accepteble to BS7671? I'm guessing...
    • 8yf13l0
    • Thread
    • circuit circuits domestic final ring ring final switch switches
    • Replies: 29
    • Forum: UK Electrical Forum
  11. M

    Dedicated ring final used to serve heating panels ?

    Afternoon, here's the proposed setup I am planning to supply 9 off 600w IR heating panels from a ring final circuit the installation is commercial and the panels will be fitted to a suspended ceiling a contractor and thermostat will control the heaters the circuit is fed from a 32a rcbo in...
  12. M

    Ring final end to end test

    As doing a cu change ,I have a ring final in a house with an end to end reading on r1-r2-Rn are so low that somewhere very close under a floorboard the ring must have been connected together somewhere, customer refused to pay more, so i have put in a 20amp mcb. To comply with current rating of a...
    • Maxstone89
    • Thread
    • final ring ring final test
    • Replies: 24
    • Forum: UK Electrical Forum
  13. Soulsurfer

    Ring final fault.

    Hi I have just looked at a friends place and she asked for a test on the CU as she thought it looked tatty ! It is, ran first ring o.k. Next ring seems to run zig zag fashion up & downstairs and to random outlets like a drunk wired it in ! Problem came when testing end to end I got r1 > 2000...
  14. A

    2 certs one job

    Hiya From a 3 phase board i have pulled a submain in to feed a 6 way single phase board and wired my final circuits from there. But i have also wired a single radial to feed a socket from the 3 phase board via a rcbo. How do you cater for this lot on test sheets? Would you do a...
  15. J

    ring circuit why ?

    why do people use a ring circuit? i understand that the cable for example 2.5mm twin and earth can carry more current in theory another reason i can think of dont know if its why is the circuit may require a heavy use of socket outlets e.g an office using computers etc... but what other reasons...
    • Jake1579
    • Thread
    • circuit final outlets ring ring circuit still
    • Replies: 6
    • Forum: UK Electrical Forum
  16. A

    2.5mm2 Ring Final Circuit vs 4.0mm2 Radial

    I recently read an article about the advantages of both the RFC and Radial circuits, after which I must admit that I am more swayed towards the Radial. What are others thoughts? What do you prefer and why?
    • atm84
    • Thread
    • cables circuit final radial ring ring final socket strange
    • Replies: 116
    • Forum: UK Electrical Forum
  17. P

    supplementary bonding and rcd protection

    Hi, a recent PIR has picked up no RCD protection and no supplemantry bonding to pipe work. Am i correct in saying if all circuits to bathroom are protected by RCD then supplementary bonding is not required?
  18. I

    Fused spur from ring final for exterior lighting

    Trying to calculate the voltage drop for a run on external lights supplied via 5Amp Fused/rcd spur from local ring final circuit. for a quotation and have got a bit confused re Voltage drop. 27m run in 1.5mm cable total load on lighting radial 420w. (no diversity as all lights either on or...
    • ianphilip007
    • Thread
    • circuit exterior exterior lighting final fuse fused fused spur light lighting ring ring final spur
    • Replies: 6
    • Forum: UK Electrical Forum
  19. C

    400v through a ring final circuit

    Hey guys, I had a callout the other day, 7 fan coil units where not working, these where supplied via a ring final circuit and once all unplugged the circuit engaged, I latter discovered all fan coil units had a dead link between line and earth under a 250v insulation test. The manager and...
    • Chrisday1990
    • Thread
    • another circuit final motors previous ring ring final through units
    • Replies: 5
    • Forum: UK Electrical Forum
  20. Poult12

    Cup Final

    Time get ready for my u14s youth final. Wish us luck! Bradford Town Youth Panthers Vs Bath Arsenal Chippenham Town Hardenhuish Park 16:30 kick off

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