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  1. O

    Distances between draw-in pits

    Hello All, I've been asked to supply distances between draw-in chambers for a large job. The SWA will be in 4 -8 inch PVC drain pipe under the ground (about 5-6 feet down in places but never above 3 feet). Due to the cable varing in size from 35mm to 150mm I'm thinking a distance of 40-50m...
  2. R

    Ring main IR question from todays EICR

    Hi All, While carrying out a commercial EICR today, I was doing IR testing on one of the ring mains an was getting 0.00M ohms between L/N - and the earth bar at 250V & 500V (cant distinguish what 2 earth wires belongs to the other 4 cores) I have continuity on both L & N legs which are...
  3. S

    Distance Between Supplies

    I wonder if someone can answer a question for me . We have to install a new dis-board in a property that already has a landlords distribution equipment installed . The landlords distribution equipment has its own service head and earthing arrangement . We wish to install a new supply taken from...
  4. S

    Fridge fan motor windings

    Hope this is the right location to post. I asked my friend to give me the motor that he replaced for his fridge. I checked the 2 terminals with an ohm meter and it showed 470k Ohm. I then used a megger between the same two terminals at 500V and it showed 0.02M Ohm and 20V (short?) Could...
  5. uksparks

    Link between one light fitting and socket circuit?

    Hi, I changed a CU this morning, old 3036 for split board. I had tested it prior, IR etc, few Zs readings and the like, continuity of rings etc, nothing abnormal, even checked for borrowed neutral on light circuit which there was. Anyway, changed it this morning, put lights on one rcd and the...
  6. naylorpd

    Small voltage from neutral to earth on TT system

    I'm building a house in Azerbaijan, with 3 phase mains supply and TT earthing. The main transformer is at least 800m from my house. Whilst doing my final measurements before going live, I noticed a small voltage between neutral and earth. It varies between 2-4V and seems to be AC. It isn't a...
  7. N

    Unexpected reading between Earth and Neutral

    Hi Everyone, Please read ALL of the post below before contributing as the fault is unusual (for me, newly qualified). My client called me out because turning on the lights in her (2009) converted stable block tripped the RCD (this is the main switch in the stable DB). Trying to re-set the rcd...
  8. P

    smoke detectors between floors...

    i have to provide smoke detectors to the flat above the shop (1) and 3 in the shop itself. im going to fit a wireless one in the flat.. so am i right in saying only one in the shop needs to be wireless if i hardwire the other 2? or will i have to fit all four the same..??:dunce2:
  9. V

    Puzzled

    Had a really weird situation today. Having installed all the wiring and new consumer unit for a full rewire, I today came to test the last circuit which was the downstairs lights. Tested continuity which was fine as was insulation resistance, upon testing for loop impedance, I got a low voltage...
  10. S

    Difference between Drivers and PSUs??

    Whatbos the difference between an LED 'driver' and a 'PSU'? I have been steered towards some divers to power some 3w 3v 900mA Cree LEDs (link below) but they still require the equivalent power input from a PSU. So what does the driver actually do...
  11. 1Justin

    odd "earth" cable between 2 PME heads

    I have some works at a small flat (4 properties). PME. Service head has been doubled up by DNO, so that supply cable for the second head exits the bottom and feeds the second. I find a 6mm green/yellow conductor strung between the PME break-outs of the two heads. It looks like the unusual work...
  12. P

    is it a requirement to have a isolator between the supply meter and the fuse board

    Elo, Can anyone help me with some advice please. If an installation has no isolator between the supply meter is they a requirement to upgrade it when doing a PIR, if so what code would it be marked down on the PIR as in both domestic or commercial installations?
  13. K

    stranded core 2.5mm creating continuity. between line and neutral.

    HI all I know neutral faults can be hard to find, different techniques are aways good to learn. I went to a clients house to fix a faults and look at the ability of the house to accept a new modern board. They almost drilled though a cable stopping before they went thought the whole cable. I...
  14. O

    Whats the diference between MK K5563s and K5561s?

    Wondering if anyone knows if the cable lengths of the K5563s Split load kit and the K5561s stacked CU cable kit are the same or vastly different? (screwfix don't stock the stacking kit, Yessss locally are useless and paying postage isn't something I want to do if possible ;) )
  15. Rockingit

    Mitsubishi Ecodan fault code

    Have a M-Ecodan ASHP system installed by a firm that's now parted company from the builders, so no warranty backup, and the ball's landed in my court to pick up the mess (six installs, btw). I've just done a callout to a non-working system which is flashing up an E9 code both at the tank end...
  16. E

    Continuity between live and neutral at cut out

    Hi - newbie here so firstly apologies if this is not in the correct place or if its a stupid question.... Following safe isolation procedure on a C/U today - on an old re-wireable board, with all fuses removed....checking that no voltage was present using a Fluke T90 I was getting a continuity...
  17. F

    Lighting circuit - Earth issue

    Hi guys, I was just replacing my light switches in my new flat (like for like, just a different look) when I came across a issue with the living room one. I had just swapped the kitchen one, switched power on to test it. Before I touched it with my hand I put my my screw driver on the metal...
  18. K

    10 metres between the meter and the CU?

    I'm looking at a situation where the overhead supply arrives at one corner of the house and the meter/cu are in the exact opposite corner. Because of the location that can't be changed, Western Power have confirmed. So at the moment there are two cables that run all round two walls of the...
  19. S

    Voltage between earth and switched line terminal on one way light switch

    After installing some LED fittings in a bathroom and disabling an electric shower circuit I carried out a check on the whole installation. All fine until I used my Di-LOG probe to probe the switch plate screws to check that I had not pinched any live wires in the light switch back boxes around...
  20. M

    diffrance between the red and green 17th edition books

    hello. im about to buy a 17th edition book i see 2 of them going kinda cheap but whats the between the red and green 17th edition books are they the same or different all together

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