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phases

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  1. W

    3.6 Kw PV with 6Kw wind

    Hi, I'm due to install a 3.6Kw system on a property with an existing 6Kw Wind turbine. I have applied for it with the DNO because it already has the 6Kw wind turbine. The installation is 3 Phase and I intend to connect the PV system to a different phase to the wind turbine. Has anybody had...
  2. D

    FIT for 10KW 3 phase

    just about to price my first 10KW 3 phase install and was wondering if the first 4Kw are at 43.3p and the remaining 6Kw at the lower rate or would the whole system be charged at lower rate? If as I suspect the whole job is at the lower rate then a 5Kw system would never be viable (for future...
  3. K

    3.6kw system into 3 phases

    An ex farm that i visited today would like to install a 3.6kw system feeding into a single phase which is currently supplying an outbuilding. The remaining 2 phases supply the house, Assuming that the DNO is happy with the imbalance, if we installed the system would the energy generated on this...
  4. P

    HeLp with 3 phase

    Hi guys just need some help with 3 phase.I have done some theory on it a while back but not alot.So I get the fact there are 3 phase's and a neutral The three phases are colour coded and go to three separate parts on the 3phase db,Is this correct?What next? For the final circuits?Cheers for any...
  5. D

    Please Explain: Symmetrical fault current

    Im doing my 2391 course and it was quickly mentioned about symmetrical fault current when talking about PFC testing. It was just mentioned and not explained so can anyone explain what this means. My first thought is that 3 phases shorted together would cancel out and leave 0 volts?? But...
  6. D

    separation of 13amp sockets on different phases

    when separating 13amp sockets on different phases by 2/2.5m -the only concern is physical separation of the sockets and not leads and appliances? am i right in thinking any risk to customers/users from appliances on different phases is very small?
  7. T

    bain marie supplied with 2 phases

    right folks wot kind of damage canb done to a single phase bainmarie, supplied with l1 and l3 and no neutral!!!!!!!!! was at job the day and some idiot had wired it like this .wonder y the client was saying the heat lamps were to hot and popping everyother day. also how did it work if there was...
  8. K

    Two phase, or two phases??

    Hi guys, Started a p.i.r today on an old small holding which used to be an active farm. From the poll, there are three cables coming into the farm house, two of these are phases and the therd seems to be neutral. One phase has the house consumer units and additions( its a six bed with 4 en...
  9. i=p/u

    single phase and 3 phase

    Q1.in most domestics its 230v and 100A main fuse. is there a limit on how many amps can be drawn when on 230v??????? could there be 500A drawn if cables are large enough Q2. as with 3phase 400v is there a limit on how many amps can be drawn??? maybe stupid question but just thinking , yas...
  10. S

    10KWp system over the phases

    Hi I'm about to quote on a 10KWp system, which will be one of the first of my own as i am newly MCS accredited. I'm getting to grips with most of this but i have a couple of questions If i split it over the 3 phases can i do this install (all 3) as G83? If so then i guess i can do 3x 4KWp. So...
  11. C

    Reducing power bill by balabcing 3 phase power

    I have a 3 phase power supply from my power supplier and i was told that my electric bill was much higher than it should be because one phase draws plenty of power while my other phases do not and the cost is calculated on the highest demand and the cost is determined by the meter with the...
  12. DiscoDave

    Bang goes the supply fuses any ideas greatly recieved.

    Picture the scene, Last week I replaced a sub main and distribution board on a farm. I left site and about six hours later two of the phases dissappear. with in half an hour of the supply going down the standby generator was fired up with out problem. The following day the corp turn up...
  13. P

    3 phase supply issues

    Hi I'm having some problems with a 2 phase supply and any help would be appreciated. I got a breakdown last week on a machine with a 3 phase motor, the contactor was burnt out and the motor windings also. The main contactors and overload have been replaced and the motor rewind completed and...
  14. J

    pfc on 3 phases

    when prospective fault testing a three phase circuit do you only need to do the short circuit test only on the 3 phases in turn due to result being twice that of the earth short circuit current due to the line voltage being twice the value?
  15. G

    110V vs 230V

    Hi, Had a question today. Why do the yanks use 110V and the UK use 230V? What are the costs and benifits? Which one is better? Any help with this one is appreciated.
  16. S

    What Is New Term For 3 Phase

    Hi, Can anyone help please? I can't remember what wording we use under the 17th Edition for phases. I know we have to use the term line conductor instead of phase conductor. But I am writing something that requires the correct terminology when expressing the 3 phases.
  17. Mark42

    Distance between socket outlets on different phases

    Hi I can’t find this anywhere: what is the minimum distance between sockets wired to different phases in a large domestic installation? I’m sure in the same room is OK (encouraged even, for load balancing - but never in the same enclosure) but I remember reading somewhere years ago about a...
  18. C

    Circuits on phases

    Hi I was wondering if anyone could explain about circuits on phases, on sites that I work on we r given drawings with lighting circuits and power circuits and I get told we need to keep certain circuits on certain phases but dnt knw why, obv you have exp L1 L2 and L3
  19. C

    3 phase meter

    Hi All, just registerd and my first post, so be gentle.. Question Regarding a Secondary 3 phase meter i installed on Friday. On Power up noticed that dial was running backwards. i tried changing 2 phases over and still running backwards, tried swapping other 2 phase over and you guessed it...
  20. F

    3-Phase 415V supply. How many circuits?!?

    Hi! I have recently changed my job and my employer has asked me to survey the existing electrical system. The main incomer is 100A 415V 3-phase and neutral and each phase and neutral is attached to a separate CU. This is how is breaks down:- L1+N= (100A CU) Handdriers in toilets, lighting...

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