readings

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  1. G

    Zs Readings from a 20KVA UPS system

    Hi peeps I have been asked to test a 'continuous' 20KVA UPS system. Which means the supply goes through the UPS first, and in effect with loss of power you will have changeover instantly. The consultant has suggested to just get the dead readings, and calculate. Whilst I am happy doing this, I...
  2. V

    Help needed with an RCD question

    Hello again, as usual I need some advice from the learned amongst us. I went to a job today with the customer saying he was reading a book and the RCD tripped. When I got there he had sussed that it was the RFC in his flat and had turned that circuit off. I unplugged all appliances and it was...
    • vickery1971
    • Thread
    • check circuit fault needed question rcd readings
    • Replies: 18
    • Forum: UK Electrical Forum
  3. L

    Megger MFT1553 unusual readings while testing rcbo's

    Hi Guys I'm fresh to the EF had a bit of a bad day, replaced an old wylex Bs3036 consumer unit with a new enclosure with 8 Rcbo's (1 x 40, 4 x 32,1 x 20, 2 x 10 amp) all went in fine all continuity, end to end tests and insulation tests went well, until I started testing the rcbo's using the...
  4. S

    Insulation resistance testing

    Hi all ran a ring circuit for someone about 6 months ago and when I carried out the insulation test my results were around 250 m ohms for l-n and slightly lower for l-e, anyway didn't think anything of it as we had just plastered all the rooms where the ring circuit went. Returned to the same...
  5. A

    Ring Final Circuit Problem

    Hi all hope you can help had a spur to fit on an old ring final circuit today that is made up of the old 3092 and old twin and earth were it has been extended in the past the readings i got end to end L 0.16 N 0.16 E 0.32 added together 0.16+0.32/4 = 0.12 but when i carried out a figure of 8 i...
  6. P

    Confused readings testing TT Ze with fluke 1653

    Afternoon I have a TT earthing system with a 63Amp (30ma)RCD Garage unit. my ze reading earth disconnected is 169 ohms - happy with that falls within range. when i do a 3 lead test on my fluke for pfc gives me 1 A reading - also happy with this ohms reading with 3 test lead is 194 when i do...
  7. W

    IR Readings

    Hi All Ive just in the process of doing a rewire and have been doing some circuit testing with my new megger 1710. On some circuits im getting IR readings of between 300 to 600 Mohm others and showing >999. My questions are: 1. should I be getting >999 on all circuits as it's a new rewire or...
  8. D

    Faultu isolation switch readings

    Hey peps. As on many occasions doing my electric shower repair rounds, I came across a faulty DP 40a pull cord shower isolation switch. Why it is I always get a reading of about 70v between L-N load side when these switches fail. It's always puzzled me why not 120v or 180v......nope always...
    • Ducksy
    • Thread
    • fault isolation readings switch
    • Replies: 3
    • Forum: UK Electrical Forum
  9. S

    Continuity of Final Ring circuit

    Hello chaps and chapettes, Continuity of final ring circuit I measured: L-L = 1.45 E-E = 0.8 but measuring N-N I got 108.8....???!!!!!! Any ideas..? Or are those readings good in my limited experience and consequently I'm an idiot. A out of date Cadbury's cream egg for the most sarcastic...
  10. M

    ELECSA Certification Scheme Ring final continuity readings and Elecsa assessment looming...

    Hi I have my Elecsa assessment in under two weeks and ive never felt so stressed in my life! I've changed my C.U. to use as my job as i thought it would be easier but im really struggling with the testing especially on the downstairs ring final sockets. Ive done end to ends and got Line 0.61ohms...
  11. A

    Ze readings change

    Hi all have a problem with zs readings on final circuit of 4.4 so tested ze which was also in the same region 4.00 tested r1 + r2 which were ok (dead test) 0.25 tested ze again now a reading of 0.37 tested socket again 0.68 tested again ten min later 2.7 went next door as the two houses...
  12. 1

    Memera 2000 RCD Question (A100HE)

    Hi Guys, Have seen some similar threads on these boards but still after some wisdom . . . At clients yesterday and completed tests on a lighting circuit that was moved to the RCD side of the board. Came to complete the RCD tests before packing up to go home and that is where it all began...
    • 1strangefish
    • Thread
    • before circuit memera question rcd readings results where
    • Replies: 4
    • Forum: UK Electrical Forum
  13. A

    TT System testing and results

    Hi Guys, I have been testing for about a year and have come across my first tt system yesterday. I disconnected the earth and tested for Ze and got 8.67 ohms which I believe to be a great reading as osg allows up to 200 ohms. I couldn't do a Ra reading as the rod is under the house and...
  14. G

    high readings at (some) socket outlets

    I'll be pulling the circuit apart anyway.. However, Thought Id run it past the forum before I do. Been testing today prior to CU change soon. When testing one of the 2 RFC's at the house all was going well, until i got very high readings at about 4/5 of the socket outlets upstairs. I was...
  15. B

    High ZE readings

    Hello all, This is my first thread as joining the group to hopefully learn and possibly assist. I have been a industral engineer for many moons and started as a sprky with a 4 year apprenticeship (yes a long time ago!) - back in those days testing seemed easier and less complex than today but...
  16. J

    FLUKE 1652 Continuity Test

    Hello people. I'm a gold card holding spark with a commercial background (metal munchin'). Recently I've got a job 2nd fixing flats, no problems except i didn't have a test rig so i bought a Fluke 1652 one 2nd hand, had it calibrated and changed the batteries. The problem is with the...
  17. B

    RFC readings

    Hello Went to job yesterday socket on ring had burn out quite badly scared customer to death. First thing i found was a spur from socket in swa no glands just made of in socket out through wall feeding 8 latern lights on patio , water feature and a summer house 4 way cu which in turn fed 6...
  18. N

    TT SYSTEM. Zs readings confusing me.

    Howdy all. A friend of mine has recently bought a house and asked me to pop round and do a few tests just for piece of mind everything's ok. It's a TT system with 30mA split DB Ze(Ra) - 10.59 with all bonding disconnected When I got some Zs readings they were all coming up at around the 15...
  19. J

    Rcd x5 higher than x1 reading

    Hi all, just filling out some paperwork from an inspection a couple of weeks ago and just noticed that a x5 reading is 76.4 and x1 is 28.4-not sure if I've misplaced a decimal point or what.. Going to go back and recheck it tomorrow- how can x5 be higher?
  20. P

    Radial circuit too long

    Hi went to a job yesterday there was 3 ring mains so i thought, after testing them they were radials but were all terminated into 32 a mcbs 2 wire in them did R1 R2 TESTS and readings were high 3.2 ohms/ 1.9ohms these were the highest there are a further 4 radials which are around the 1.9 the...
    • pablo4321
    • Thread
    • circuit circuits long radial radial circuit radials readings
    • Replies: 21
    • Forum: UK Electrical Forum

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