three phase

  1. R

    How to size earth conductor of three phase generator

    75kva 3phase Maxcurrent per phase 108A Outgoing feeders from genset 4C 35mmsq cable + 16mmsq CPC Earth conductor from genset earth point to earth electrode = 50mmsq Question: why 50mmsq? Isnt 16mmsq sufficient since cpcs are sized at S/2 half of phase conductors. Are earth conductors to earth...
  2. H

    Three Phase Neutral and Earth

    Got to run this in. Is four core and armour as earth acceptable or do I need to run a separate earth??
    • highspark
    • Thread
    • earth neutral phase three three phase
    • Replies: 23
    • Forum: UK Electrical Forum
  3. S

    three phase

    Hi chaps got a job coming up wiring in a kiln. We put it a single phase one in a wile back ran in two three core swa's one did the kiln the other did the a consumer unit. Customer now wants a three phase kiln put in and do away with the consumer unit as its no longer feeding anything, both swa's...
    • spidersparks
    • Thread
    • phase three three phase
    • Replies: 28
    • Forum: UK Electrical Forum
  4. S

    Three phase pfc too high!

    I have a three phase dis/board with a measured PFC of 10 kA across each phase (20 kA total) and a Ze of 0.03. The origin is 100 amp BS 1361 type IIb x 3 and the tails are 1.5m long. The MCB's are type B and have a short ciruit rating of 6 kA, should these be changed for 10 kA or higher. The...
    • shaun gold
    • Thread
    • pfc phase three three phase too
    • Replies: 4
    • Forum: UK Electrical Forum
  5. C

    Will a three phase meter meaure single phase if required?

    I have to install a temporary single phase supply which is getting upgraded to three phase very soon. Will a modern three phase meter measure just the current being used on one phase? Can anyone recommend any particular brand/model? I've got to come out of an existing TP board so looks like I...
    • chronyx
    • Thread
    • meter phase required single single phase three three phase
    • Replies: 8
    • Forum: UK Electrical Forum
  6. R

    Understanding three phase.

    I've heard many a time on here that people don't understand three phase enough to work on it. Im just wondering what exactly people don't understand?
  7. imago

    Three phase earth 'rod'

    I went to look at a job the other evening on a farm which had barns converted to storage and light industrial units. I was there to look at wiring up one of the units for socket outlets and lights. When I got there I was pleasantly surprised to see a brand new meter for each of the four units...
  8. La Poste

    Quick three phase question

    Greetings. I apologise if this is a bit of a daft question but I don't know much about three phase. In a three phase system there is only current in the neutral if there is an imbalance of the phases right? So looking at the transformer that supplies our street it is a three phase transformer...
  9. M

    Does Single Phase Or Three Phase Require a Neutral?

    Also, how does the neutral work on a phase system?
    • MattyH
    • Thread
    • neutral phase require single single phase three three phase
    • Replies: 30
    • Forum: UK Electrical Forum
  10. F

    Second PV Array requires Three Phase?

    In recent weeks I have been exploring (and continually bumping into dead-ends) the possibility of adding additional PV to my property (I already have 3.75kWp with 3.6kW/16A-restricted Aurora inverter). I happened to get an out-of-the-blue phone call today from a solar company who were one of...
  11. D

    Adding 4kWp to a three phase - unbalanced?

    Chaps, if someone has a three phase system and only wants 4kWp, is it OK to just put the lot on a single phase - do we need to be concerned about balancing the phases? Thanks!
  12. L

    Three Phase Ramp Wiring?

    Afternoon all. Well, here goes my first question..... I have bought a three phase car ramp and want to connect it to a single phase, 16A socket in my workshop. I have bought a Clarke PC40 230v to 415v 3.5HP Phase Converter, to which I have fitted a 16A blue plug to go into my existing workshop...
  13. J

    Three phase DB, water, you can geuss!

    Well, having just joined up i thought id post some of the work i get involved with and what not and generally introduce myself! Im Jamie, I'm 22, and an industrial/commercial electrician in the southwest. Generally i get alot of fault finding and reactive installation work to do, and I'm just...
  14. J

    Current rating for three phase motor

    Hi Can some please tell me the current rating of a 0.55kw 3phase motor? Thanks
  15. B

    Three phase current motor 400v

    In a 23 kw three phase motor will each phase have 100a?
    • brizospark
    • Thread
    • current motor phase three three phase
    • Replies: 13
    • Forum: UK Electrical Forum
  16. G

    Three Phase Fan Units

    What test would you carry out of a three phase fan unit?
  17. D

    Three Phase Question

    Hi I got given a Mock Paper for the Level 2 203 test and got stumped on a question 400v 50Hz 3 phase supply is connected to a star connected balanced load. the voltage is? A.110V B.200V C.400V D.600V Iam not sure if its C or D any help would be much loved Ty
  18. H

    RCD protection on Office socket - Three phase board.

    On a job at the moment and office sockets have no RCD protection. They are ran in singles, PVC conduit. I am adding onto the circuit as additional rooms are in the process of being built. Do I need to protect the whole circuit with an RCD or can I just protect the new sockets with an RCD FCU...
    • highspark
    • Thread
    • board office phase protection rcd socket three three phase
    • Replies: 28
    • Forum: Talk Electrician Forum
  19. T

    Two Three Phase motors on one Overload

    Hi All I have come across two 3 phase in line WOODS fans rated @ 0.22 kW / 0.6 amps connected together on one overload. This does not seem correct is there anyway this could be right ? Regards Tailspin :shocked::confused:
  20. G

    Help with three phase power

    Hi I need some help with 3 phase wiring. I'm fairly confident I'm right but haven't done it since I was 18. Would I be right in saying that normal 3 phase power for sockets are wired in star and you should end up with 5 cables at each outlet? L1, L2, L3, N & E? With a 3 pole isolator for...
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