potential | Page 3

potential

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  1. E

    Is there a fault and what is it??????

    Hello lads, Right here goes I get a call of a plumber who's on a job doing a boiler chop..... He calls saying I've just tested the boiler spur and I'm getting strange readings. So being the helpful sparky I am I plod along over to his job I have a quick look at this spur must be 15 years old...
  2. HappyHippyDad

    Extending the equipotential Zone of PME installation.

    I was going to just add on to Voltz's thread but it seemed to come to a natural end but I had some questions. 1. A few experienced members say that you should not extend the (equipotential zone) EPZ of a PME system. Am I right in thinking that this is because of the possible potential between...
  3. M

    Would you code a 60 amp main switch been fed from a 100 amp BS1361

    I carried out a EICR and the main switch for the consumer unit is only rated at 60 amps and the main supply fuse is a BS1361 rated at 100 amps. Im thinking this should be a C2, what are your thoughts please. Many thanks Martin
  4. N

    Potential hammer blow today

    Went to a training center to practice my testing, prior to 2932 practical assessment tomorrow 2/06/06. I Found out the test forms have all been changed to AMD3. The blank test sheets they're providing are not the IEC ones I'm used to, and they're NIC branded. To add insult to injury...
  5. D

    Brain-train question for you trainee's

    I get called out to a customer who says they are getting shocks in the kitchen and they have pinned it down to when they touch the sink drainer and kettle at the same time. Now just for this senerio we will skip safe isolation, testing sequence etc - its just hypothetical to get you imagining...
  6. C

    main Bonding of Water Pipe - supply not unique to property - Potential difference?

    Hi, I understand according to 411.3.1.2, that main metalic services incomming must be bonded to MET. but what if the water pipe is shared from another property? The premises has its own electrical supply, but the incoming water is not individual but shared. I believe i should still Bond. Could...
  7. B

    Advice Needed Regarding Potential Rodent Damage To Electrical Cables/System

    Hi All, I was advised by a member of another tech forum to ask for help over here. We have had an influx of Rats & Mice at our home over the last six months. We got very badly screwed over by a Pest Controller that was recommended to us - he told us that he had checked the drains & that was...
  8. G

    Potential deputy PM here

    It may happen, try not to Cry lol
  9. P

    correct way to test potential difference?

    elo guys, could someone explain how to test the potential difference between the main earthing and water pipes and what test instrument i should use?
  10. F

    Three phase supplying a domestic flat.

    Hi guys, i had a look at a building in the west end of london which is spilt into 10 flats this weekend to do some upgrading works to the landlord area. i noticed that there was originally 6 flats and the landlord must of added an addition 4 flats on top. Called 10 9 8 7. ( obviously). The...
  11. O

    Fall of potential

    Please can any one advice on how to take a measure of the fall of potential on 3 mtr ground rod when surrounding area is concrete, i have been told to secure test probes on p1 and c2 at the appropriate distances and cover in water, any help is greatly appreciated.
  12. S

    Lighting Strike - Ground Potential Rise - Cable Damage

    Hi all Called to a neighbour whod had almost direct hit lighting strike, I know this because I witnessed it and the same strike turned my desktop PC and bband modem into charcoal briquettes/paperweights. It also took out her telephone and bband permanently. All her electrics had tripped but...
  13. W

    Potential Eicr code opinion please

    2x 3kw extraction fan motors with no starters or O/L cutouts, switched on and off direct via rotary isolator is it even to be coded? would like any opinions please
  14. S

    electrical installations in an areas containing potential explosive gases

    Evening Gents, Can anyone advise of ratings of electrical equipment , disboards, switches, light fittings and socket outlets in a potentially explosive environment. Thanks Sparky 63
  15. D

    potential student

    Wow.. what a ball ache to just register!.. what with all the ads it's hard to even navigate on here.. anyway.. I just wanted to ask a question of whether the following course outline would be recommended for myself. I'm looking to qualify for domestic/commercial installation and testing...
  16. uksparks

    EICR Codings

    Hi, I don't tend to do EICR's that often, and have just done one and wanted a little advice as to if my codings are correct or maybe little over the top. Like I say, I tend to go on the side of safety and really just looking for a bit of direction and if I am working along the right lines...
  17. A

    Step and Touch Voltages

    Wondred if anyone had experience of step and touch voltage measurement and what values are normally measured in the field. Did a test today and got a value of 12.1V for Touch and 31.4V for step potential. Wondered if this was inline with the "Norm".
  18. C

    Potential difference between supplier's earth and water/gas earth...

    Anyone ever noticed a difference between these? Just curious.........
  19. S

    3 Phase map - any bright sparks?

    I am undertaking some research on the optimal potential of wind turbines in the UK. I am trying to find out where there is 3 Phase power. I am a wildlife scientist based in South Africa and have dangerously little knowledge of electricity so I would appreciate ANY guidance. Thanks Shan
  20. G

    Confusion on earth potential and continuity in bathrooms

    Hi, I'm new to the forums so am not sure if this is the right section for these questions, but it appears to be a good area to place them. I'm pretty new to learning about electrical installation, and as i go along, i realise there's still some gaps in my understanding which I can't seem to...

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