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  1. cliffed

    Zs reading high on external lighting

    Fitted 2 new external lights onto existing cabling, their on a remote wall quite a distance from house. My mistake was not doing a Zs before I started the works. Finished & tested Zs reading 14 ohms. Its a Tncs supply quite a big install…the lights are supplied by a 6 amp C type MCB. Reported...
  2. Dartlec

    Neutral to CPC low reading on lighting circuit EICR

    Typically the EICR I fitted in this afternoon because I'd hoped it would be fairly simple (new build home, 2007), turned out to be the only recent one that's thrown up a major FI. Downstairs lighting circuit, 1mm T&E, currently on a 6A MCB R1+R2 fine, insulation test L&N -> E an immediate...
  3. V

    CPC low R2 continuity reading ring final

    Hi, I've just been testing a ring final before installing an outdoor socket and I got an R1 and rn of 0.6, but instead of 1.01 for R2 I got a range of readings from 0.1 to 0.51 and it wouldn't settle down, so I couldn't continue the tests. I know parallel paths could cause a low reading, but...
  4. C

    Low IR reading

    Hey people, I did some testing for a sporadic RCD trip this week. The customer did some playing about and narrowed it down to the garage. Tested the garage circuits and all were good. Tested the feed and found with the CPC still in the bar I got 0.076 meg but when I pulled it out the fault...
  5. Dartlec

    Bulb charging E7 reading at single rate

    Had a weird one tonight, with a new tenant who had a higher than expected first monthly bill. Studio flat with one storage heater and off peak immersion, standard white Economy 7 meter with teleswitch. Bulb had set the tenant up on their single rate tariff and happily accepted the two readings...
  6. J

    High Zs reading

    Hello, looking for some advice on 2 things please. Ive tested a ring main in a house with RCD protection, the results ive had are L-L .43 N-N . 41 E-E 1.17 I had a look for a loose connection but can’t find anything, how high does the CPC reading need to be before you would consider it ‘to...
  7. W

    Why is a too high zs reading on a circuit okay if it’s protected by an Rcd?

    Not long passed my test but was wondering why it’s okay for a circuit to be over the max zs if it’s protected by an RCD?
  8. Kuba

    No reading N-N end to end on a ring main

    I’m doing some tests on my board at home in order to prepare it for an upgrade. It’s an old plastic GE board with no rcd protection. Doing continuity of ring final circuit on the main ring. When it comes to end to end tests at the consumer unit I’m getting no reading between neutrals. All good...
  9. F

    high zs reading advice please

    an eicr was carried out to an industrial plant area were the zs readings were all high readings above the maximum for a tns installation i noticed that the supply cable in question was getting monitored by an elcb. However recently the company or contractors. have driven in earth rods local to...
  10. J

    Transformer neutral reading 28v

    I’ve seen a 110v control transformer reading 28v on the neatral to earth and 67 on the other leg. Why would this be?
  11. J

    Best Light for Reading, Computer Office: Flat Panel or Globe Dome Light?

    We are thinking of installing new ceiling lights, in Standard 10 feet ceiling. We originally have 4 inch diameter light in the hallway. My son would keep the door open to prevent getting hot, however this hallway light was hitting the side, peripheral of his eye, very small and lot of light...
  12. S

    two string inverter only shows reading for pv1 shows zero for pv 2

    hi i have a 4kw samil power solar river inverter. when i log on it reading for pv1 shows zero for pv 2 i checked both strings with multimeter and both show simmilar readings. just to note its like this even when im getting over 3kw
  13. D

    Insulation Resistance - Low Reading on Ring

    Newbie Testing Question: I am getting a very low IR reading between L&N on a kitchen ring (0.01M). The ring was working fine with no tripping before testing. Can anyone shed any light on what may be causing this low reading? Thanks
  14. NellyManjaro

    IR reading of 3.4 mega ohms, upgrading CU help

    Ok so I have been to a domestic property today, and carried out an EICR, couple of issues flagged up with regards to the usual no RCD protection bonding cables etc now its quite a big property and the customer has gone with my advice of RCBOs but one question. Most circuits tested fine but the...
  15. K

    Current reading on ground electrode conductor in main panel

    I live in the Philippines but I have the same US electrical system (2 x 110V hot + 1 x neutral). I have two ground rods buried 8 ft. deep and connected to the main panel. Netural and ground are bonded in the main panel. And from the main panel, all 4 wires (2L + 1N + 1G) go to sub panels. Ground...
  16. J

    Reading HVAC schematic

    Just want to know what the spikes highlighted in red circles mean on the schematic attached? Help would be much appreciated
  17. Abbywho

    who’s reading this?

    If you’re reading this, I’m sure you’ve already heard of me, I’d like to apply to join some groups! Idk how this works.
  18. E

    UK CPC missing on ring final

    Morning All, Currently carrying out an EICR and going through ring final steps with the following readings: r1: 0.31ohm rn: 0.32ohm r2: 0.03ohm Started taking sockets faces off to find that there is no cpc, only fly lead to metal patress box and steel conduit trunking. (See photo) When i...
  19. T

    I Need Work Electrical Improver seeking work in the Reading area.

    Hello I’m an Electrical improver based in Reading. I have * EAL Electrical Installation lv2 17th Edition Testing & Inspecting 2392 ECS IPAF Abrasive discs 2020 Ticket Manual Handling 2020 Ticket Working at height 2020 Ticket All my experience has been commercial and industrial my last two...
  20. E

    r1 + r2 No Reading, Open Circuit!

    Hi All, Busy doing an EICR and on 2 of the Socket Rings for the dead test I get the following results: Step 1: End to End (0.32 ohm r1, N ) & (r2 = 0.51 ohm) Step 2: r1 to N 35.6 ohm Step 3: r1 to r2 no reading At first I thought maybe I was testing the wrong r2 in/out but I traced the cable...

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