pme

  1. T

    TT or PME?

    Hi folks, I came across this cutout today with an earth cable going directly from the cutout into the ground....is it some sort of hybrid TT system? Ze was 0.39 which seems too low for TT (but a bit in the high side for PME? Armoured cable runs from here to the house about 20m away and I took...
  2. T

    Dodgy PME?

    Hi, wondering if anyone can help me. Came across an installation that doesn't appear to have any means of earthing at the intake. Some work has been done to run power to a garden workshop and the earth to this has just been terminated in with the neutral AFTER the meter.....is this allowed?? It...
  3. Brownie91

    Is SPD mandatory for a new circuit?

    Hi all I am after some advice on an installation I have coming up. Its a new TP+N circuit in SWA (13m run clipped direct) for a 22kW Tesla wall charger. I will be installing a Matt:e unit upstream to provide regs compliant RCD protection & Open Pen protection. My main question is do I need...
  4. I

    Odd PME discovery?

    Hi guys, Had an issue at a recent survey where doing a quick check and found we had pme with a reading of 0.44 ohms. Called the network and they said they would send a guy around who promptly turned up and checked. However his tester was giving a reading of 0.30! I checked again using the...
  5. ThatCompexDude

    PME fault after moving charger to 3TP board

    Evening all, I have a little conundrum I need to get resolved. I’ve moved an EV charger from a single phase board that was on a 40a breaker and no RCD protection, over to a different 3TP board, on a new 40a Type A RCBO (Single phase) The customer is now reporting that the charger has a PME...
  6. B

    Steel framed units multiple PME supplies

    Multiple commercial units within the same steel frame cant each have a PME supply (from the same transformer), we have to install an earth electrode to each unit. Did anyone know that? The NICEIC tech help didnt today... Even though NPG supply a MET cant be used. A break in the neutral...
  7. K

    Garden supply on PME system

    Evening everyone . Currently looking at pricing a job up . It’s a hot tub supply . Outside socket with a few spare ways in an outdoor cu . 10mm armoured cable on 45 amp mcb . To outdoor consumer unit . From there a 32 amp hot tub circuit and an outdoor socket all in armoured . The question is...
  8. kediss

    UK Backup 106A generator earthing arrangement questions

    5 single phases to one huge property. Backup generator which can take about 106 amps split between 2 phases - 1 phase will be wired through the 2 pole ats which has been pre installed with the earths linking through to the pme system ( think for a 32a backup generator ) and then the other...
  9. SJD

    Surge protection devices for PME supplies?

    I've been installing Type 2 SPDs in consumer units for several years now, and they always come as a pair, connected across L & E, and across N & E. Typically they plug into a holder, sometimes as two separate SPDs (e.g. Hager, with separate E connections), more often now as one combined SPD...
  10. B

    PME Supply Advice

    Afternoon All, Just pricing up a job and thought I'd pick your brains. Quick run-down, Block of Flats with an underground car park. In the mains room each individual flat has a supply ran up to the flat (picture for reference) with a split concentric. The PME connection is provided within the...
  11. I

    UK Odd PME test result...

    Morning guys! Went to look at a consumer unit change today with a PME supply. Now, right next to this was an old BS3036 60A fused mem cutout that then sent a pair of 16mm tails to the consumer unit up into the loft, across about 3m and then down the wall in surface trunking down to an old...
  12. ElectricallyRandom

    EV charger issue - Garo PME trips

    Hi. Not sure if it's the right place to ask, so won't be upset if it gets removed. Apologies if the terminology (PEN/PME/etc) is used inaccurately. I had an EV charger installed in December on my detached garage by a local electrician. The charger is one that doesn't have a PEN fault detection...
  13. T

    Street lights on PME?

    After conducting a recent EICR I found among other things that the Galvanised columns in the carpark area of this premises seem to be connected directly to the TNCS system. Keeping in mind the potential issues should a PEN fault occur it struck me that this was maybe not the best idea. However...
  14. HappyHippyDad

    PME on a farm?...........

    I am about to install 4 sockets in 4 separate stone enclosures, housed within a large stone outbuilding. They have stone floors and are completely weatherproofed. They may be having small animals in them, goats, sheep etc. The existing set up is TN-C-S. BS7671 doesn't go into much depth with...
  15. W

    GARO PME fault device, resetting

    Hello, Just had a client call saying EVCP was not working. It is supplied via a 'G6EV40PME' from what he was saying it looks like this cut out the supply, I cant remember if this device is self resetting when the voltage monitored is within range or if you have to reset the device by tripping...
  16. C

    Garo PME unit for metal shed supply

    Metal shed In Garden with no extraneous conductive parts House electrics PME supply Garo make a 40a PME fault detection unit for EVs and I was thinking of exporting the PME via the garo init at the supply end and swapping out the factory 30ma to a 100ma time delay Then use 30ma RCBOs in the...
  17. ferg

    Shipping container PME

    Upcoming job to install lighting and sockets in a shipping container. Supply is PME to a metal clad steel framed building and the container is sited approximately 2m away from the building. Also a heat pump within touching distance of the container. Container sitting directly on the ground...
  18. Aaron b

    Steel Container/cabin with PME supply

    Hello, Where I work there's a steel cabin that other employees have installed and powered up without certification. Am I correct in thinking it's covered under part 717.411.4 that it can not be connected to a PME supply? I've been asked to test it and I'm concerned with the design and...
  19. J

    Hot tubs and PME or TT

    Hi guys I have a question on installing an outside supply to a spa at home. I have a few questions regarding this one is the consumer unit has no spare ways have checked maximum demand and all seems okay for an additional 32 amp load. My plan was to get a garage style CU and take out out of the...
  20. S

    Pme question again

    Am carrying out a job soon a sub main to a out building in someone’s garden. The house is tncs earthing so was planning on doing tt at the shed. There’s no extraneous metal work, but it is a concrete base and they are planning on putting some fridges or freezers in there. Would others do the...

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