three phase | Page 9

three phase

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  1. S

    Three phase required?

    Hi all, I have a customer who wants a new kitchen. Previously he has paid for an NICEIC electrician to wire in countless under floor heating throughout his house on one 32amp breaker, I calculated potential 60 amps if they were all on at the same time. He/she has since gone out of...
  2. D

    Three phase RCD tripping

    Hi Folks, I have a question about a property in Spain and its power supply I think I have messed up with my electrical company and asked them to supply me with a lower potential than I require. The house did have a 12,000 KW supply, I asked for a night rate and in order to get this I had to...
  3. A

    Testing single phase and three phase

    Hi to the forum This is my first post on here; I am a semi-retired (due to my knees being knacked.) Worked most of my 40 years on the domestic side ie rewires, kitchens, central heating etc not a lot on three phase. Been asked now by a mate to upgrade electrics in a shop premises, the upgrade...
  4. C

    Three Phase inverter for a single phase install?

    hello there. I am talking to some people at the moment who wish to install 10KWp on a single phase of a three phase supply. The single phase supplies the house and they want to make as much as as they can from the system. Assuming all is well with the DNO etc. I would propose two 5KW single...
  5. A

    Three Phase supply Substations

    Does anyone know what the min size supply to a building would require its own sub station?
  6. 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...
  7. 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??
  8. 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...
  9. 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...
  10. W

    3 Three Phase Inverter ! Question

    Hey, I had a quick look though the forum and although there was a few bits about 3 phase inverters nothing quite answered the questions I had. So we plan to do our first 3 phase job… we have done hundreds of the usual 4kw etc… the job will be 30 panels (250watt) and we plan to use a 7000 Soalr...
  11. 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...
  12. 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?
  13. 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...
  14. 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...
  15. M

    Does Single Phase Or Three Phase Require a Neutral?

    Also, how does the neutral work on a phase system?
  16. 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...
  17. 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!
  18. 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...
  19. 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...
  20. J

    Current rating for three phase motor

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

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