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  1. Gavin John Hyde

    When is TNS really PME and vice versa?

    Had a interesting phonecall a moment ago with western power. Have a customer wanting a ev charging point, so checking the supply and due to the old cut out appearing as a TNS and also having a PME sticker on it, I rang western power; they said that its now PME as according to the records there...
  2. F

    TNCS PME on caravan site with static caravan EICR

    hi all i was just in the middle of doing an eicr on a caravan park and wanted some opinions on what codes are relevant to the site. ive got tncs pme 100a 3 phase. each phase feeds a db like in the picture by a 100a main switch and 63 amp mcb and 10mm pyro (earthed with bonding clamp) which in...
  3. C

    Garage supply using PME or earth rod.

    Evening gents, just seeking a little advice. Recently bought a new place, it has mostly been rewired, its on a TN-CS system. The garage which is approx a 40m run from the house is supplied by a 2.5mm cable believe it or not, it is donkeys years old. This supplies a 2 way rcd board in the garage...
  4. T

    Shipping containers pme

    Hi I have lurked here a while but have never posted before. I have been to a site this week with a view to put some motors on some gates, however the current installation needs some attention. The site is a builders yard sited probably 20 meters from a large house the yard is supplied by 10MM...
  5. andysparkfree

    PME head , builder forgot earth cable , 100amp 3phase supply , 10 bedroom house , 10 bedroom house

    Hi all , im new here but have always looked for answers over the months description of my question there is an external 100 amp 3 phase metered head that this new 10 bed house is to be fed from , the builders installed a 35mm 4core swa as i directed however they forgot about a 16mm earth now...
  6. telectrix

    NOT SEEN THIS BEFORE. ASSUME PME???

    as title.cable tapped into N, disappears into the ground. assume to a rod.
  7. Golden_Boy

    Can i assume NO PME at this location

    I noticed the link is not connected ??
  8. NDG Elecs

    Is this PME, the DNO day it's up to me to find out!

    Hi, Just a quick query for others views please. Customer had a brand new three phase supply put in in April. I have been called in to rectify the ---- poor work carried out so far. The first thing I noticed was there is no main earth. The 3P head has a green PME sticker, but there is no...
  9. D

    Pme installations in 18th edition with additional rod.

    It's proposed in the 18th edition that any new pme installation is to have a rod added by the electrician that has has a resistance of 30ohms or less. What are people's thoughts on this? My main concern is the amount of services that are going to get hit with everyone driving rods in.....also my...
  10. T

    Energy supplier refusing to connect up new PME supply?

    Afternoon all. Just had a weird one and was wondering if there was some regulation that I'm not aware of or if I've missed something stupid.... The DNO have brought in a new PME supply to a purpose built (permanent) shed in a field where there is going to be a new build domestic property later...
  11. R

    Overhead Supply with PME, DNO?

    I have been called to a job that has an fault unrelated to this question. When conducting checks to earthing and Main Bonding I noticed the earthing arrangement has been converted to PME, there was also no main Bonding. I have attached a picture, I am a little sceptical to who has altered...
  12. B

    PME supply query (and bulk out the title)

    Hi all, I've been surveying 12 blocks of flats today with a view to doing full eicr's on the lateral mains and landlord lighting supplies. All the main services terminate at a Henly distribution board with no cut-out or main fuses. See pic, I've done very little on pme supplies and wonder if...
  13. Gavin John Hyde

    PME system with earth rod aswell

    Been on a job today and debating what to put on the certificate. The DNO in early 2013 upgraded the supply and installed PME. The previous setup had an earth rod installed. This is still connected to the main earth terminal. Not sure what type the previous set up was as the customer is none the...
  14. A

    PME or TT or Both To Caravan Or Outbuilding

    hi I'm a part qualified electrician gaining exp wherever I can whilst doing my college course. Today we were hooking up a static caravan with 3 core swa. All was good until we started doing the tests. With the pme connected I was getting 0.26 as an earth loop at the board in the van. The boss...
  15. S

    Exterior socket on PME system

    I'm installing a 32A socket on a PME system. The socket itself is indoors and is on its own RCBO. The intention is to use the socket for power for outdoor events. My technical help line says that I should disconnect the earth at the socket then TT it. It seems to me that that would make it...
  16. R

    Pme TT in same farm building

    Metal farm building currently has single phase TT supply with all the required bonding in place. Client requires a 3 phase supply for a piece of equipment in this building - is it possible to bring a 3 phase supply from the farms house which is PME?
  17. D

    Another "exporting PME post"...

    I have a situation whereby a new build property has had a green electrical cabinet installed at its boundary, and a new 3ph PME supply installed. There is a 4c 25mm SWA from here to the detached garage, which will house the plant room (3ph ground source heat pump, 3ph PV inverter), and then...
  18. kingeri

    100mA RCD on PME system

    I am going to a job this afternoon, new shower circuit. I noticed yesterday that the Wylex CU has a 100mA S-type RCD as the main switch and all the circuits are on 30mA RCBOs. PME system as far as I could tell (certainly not TT). Didn't give it much thought then, but was thinking about it...
  19. Midwest

    PME supply to detached garage

    My question is not quite in the title. I've been asked to quote for the above. No extraneous conductive parts in garage, which I intend to supply from spare way in house domestic CU, swa to garage CU utilizing the earthing facility of TN-C-S. However, one of the reasons they want the supply...
  20. W

    150m submain to multiple outbuildings earthing (PME)

    Hi there can I describe an installation and I would love to hear some opinions as to weather the earthing is up to standard. Its quite a long run so I'm concerned about the difference between true earth and system earth! Submain comes direct from meter cupboard in farmhouse through 100a main...

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