readings

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  1. M

    How do i calculate missing resistance readings in a parallel circuit using R1 and Rt

    Hi I am a current student studying to become an electrician and a question has thrown me. I'm wondering if someone could help, there is a question on one of my home work books. "complete the following table assuming the resistors are connected in parallel?" the example I will give is R1 is 120...
    • MikeGawan
    • Thread
    • calculate circuit missing parallel readings resistance using
    • Replies: 10
    • Forum: Electrical Engineering Chat
  2. B

    Earth readings

    TT system Ze is 17.5 ohms but when connected it is 0.60 ohms? Have one outgoing 95mm SWA and one 240mm SWA earthed either end and individual rods? Thanks
  3. B

    Bit of damp affecting my readings ?

    IR readings a bit low on kitchen rfc..,..think I found the cause...
  4. B

    First eicr and low iR readings

    Being new to this game I’ve been waiting a while for the right job to come along and I have now done my first eicr today, small Chinese takeaway 2 circuits (lights and 1 rfc) most cooking appliances are gas, found some interesting stuff like sockets wired from lighting circuit,main bond buried...
  5. cliffed

    Short circuit compliance on high Zs readings

    Would you divide the 5.13 ohms by 4. I personally don’t think so. Also the R1 /Rn short circuit resistances are different from the usual R1 /R2 measurements. Found those in an electrical book by,that man. The Zs on this circuit was above the permitted figure,so just had a play around to see if...
  6. cliffed

    Eicr ring main readings

    Would you guys be happy with these readings on ring main,Rcbo c type 30ma/32 amp. r1 1.87...rn 1.91 cpc 3.20....R1 +R2.1.26. zs 1.46 ohms.
  7. D

    Solar Ammeter readings in/out

    Hi all just registered and looking for an answer to an issue with my installation. I will give you the spec first. Two X BP solar panels each one: Nom peak power 75.00 Peak power voltage 17.00 Peak power current 4.45 Short circuit current 4.75 Open circuit voltage 21.40 Victron energy 75/15...
  8. R

    Max zs readings for TT

    Hi just wondering what people are noting as there max permitted zs reading on test results sheet for TT systems? 200ohms or 1667ohms?
  9. Q

    Dead short readings on TNS

    Evening all A few weeks ago we were doing an Eicr and were getting dead shorts on every circuit between neutral and earth. In the end it was believed that the fault might actually stem from the incoming earth. I understand you will get a short if it was tncs but not usually tns. However the...
  10. B

    3 phase test readings help

    Hi have wierd dilemma, looks to be 3 phase - 4 wire system so testing am getting this L1-L2 Nothing L2-L3 450v L1-L3 450v L1-N 230v L2-N 230v L3-N 230v Why no L1-L2?
  11. B

    High TNS readingssssss

    TNS system 60947-2 main switch 60898 double pole 63amp MCBs that feed some caravan boxes now some circuits I can get below the disconnection times of 0.56 ohms but some are 1.22 ohms now I’ve tried changing glands anything else I can do apart from TT the hook up unit? Or do you need upfront RCD...
  12. B

    Caravan site readings on TT system

    Hi, have a distribution unit which feeds some caravan boxes TT system, it has upfront 300mA RCD and double pole 60898, now I’ve been sent to re gland as the disconnect times wasn’t met, but I’m getting readings of 0.30 ohms when max is either TT 167 ohms or if you go by MCB then 0.59? But the...
  13. G

    zs readings before and after rcd.

    anyone come across this before zs at board 0.28. then when measure zs on rcd side on live and neutral, reading of 0.77. from the same earth position.?, ie got a socket a meter away from board earth loop 0.81. measure earth from socket to board its 0.02.
  14. HappyHippyDad

    Increasing Zs readings on a ring as I progress through the house.

    I have just fitted a new consumer unit into a house which previously just had a fuse box BS3036 with no RCD protection. Whilst doing the testing the Zs readings were not as expected. They are around 1Ω throughout the house but at one socket they are 3.7Ω. The customer states this was the socket...
  15. N

    Landis+Gry E100 5253A suspect PV readings

    Hi All, any chance of some advice please...i have a 2kw solar pv system fitted and was being monitored with the old style rotating disk meter....my energy FIT suppler (SSE) changed the old meter to the above (in the title)...now over the last year i have found my bills or direct debt (for...
  16. B

    Meter readings helppp

    Got various types of meters, some that show available balance like KWH available and some that show £££ available, it’s 0.11p for 1 KWH How would I go about converting the KWH to ££ And ££ to KWH So I have a figure for both Thanks
  17. gazdkw82

    Strange voltage readings - broken earth

    Was fixing a broken twin florescent fitting today and came across something I couldn't work out. First thing I did was measure the incoming voltage. At the fitting I measured L-E =190, N-E = 90v. Scratched my head for a minute until I realized the Earth's coming in from the numerous (4) twin...
  18. P

    Varying continuity readings

    Hi all, I am using a Fluke 1662 with fused test leads. I find when doing continuity tests such as R1+R2, as the test button is being held the result fluctuates dramatically. Both increasing and decreasing. Seems to happen on insulation resistance as well however not so much. I also find after...
  19. O

    L-E 199v, N-E 199v ............... real readings

    So these are the readings on a radial (serving the immersion and a socket in the loft) NOT connected to the CU ............. odd I thought - no direct connections between the 2 circuits I have located the issue ........ Just for a bit of light hearted fun - anyone want to guess what caused it?
  20. P

    Strange readings on ze and zs

    Studio flat recently re-wired. Ryfields board with main earth coming in and connects to side of ryfields (sealed unit). Flat’s own head outside has main isolator, from there 25mm tails to inside and then in main switch on DB. With 16mm earth feeding board. Ze at main switch on DB with main...

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