three phase

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  1. J

    Domestic three phase? advice

    Hi I have recently moved into a small newly renovated (inc electrics) cottage and noticed appliances going really slow. Kettle taking an age to boil, toaster taking a long time, hair clippers going slow... you get the picture. UK power networks sent an engineer that changed the overhead power...
  2. M

    No neutral on three phase

    Hi all Need some help remembering some college work. Been doing a job and we are pulling in 400mm singles in parallel, got three phases and a seperate earth but no neutral. From what i remember from college was it becuase if you had the phases all balanced youd have no...
  3. P

    three phase coolant pump

    Hi i have just bought a lathe which is running on three phase i have bought a vfd to run the lathe from single phase but i have a coolant pump that runs on three phase i have converted it to run on single phase but it appears to have a dip when running do any of you guys know what i need to do...
  4. C

    Three phase upgrade question

    Hello all...hope someone here can help.... currently have three phases coming in to the property (old farm) but only receive single phase with a single phase meter. The overhead cables were upgraded a few years ago so the cabling up to the meter is all fairly recent, I can see the 3x100amp...
  5. haptism

    NVQ3 2356, three phase question

    I will be enrolling on the NVQ3 2356 soon but have a question regarding the three phase element. As i work for agencys as an improver its seldom that I ever get asked to connect up three phase equipment, or test it. How have any of you previous students on the 2356 (mature candidate) found their...
  6. L

    Three Phase calculation

    Hi, need to ask a question about a 3 phase air condition. On it's data tag it is rated at 20Amps. When it rated like this are the 20amps on each phase? Thanks in advance.
  7. A

    Question regarding 400V three phase lighting connected in Delta, without Neutral.

    I am in the process of designing the electrical installation of a community centre, and have a question about the provision of three phase lighting for a large function room containing 18 36W LED fittings. All of the light fittings are to be switched simultaneously. Would it be possible to...
    • AReynolds
    • Thread
    • connected delta lighting neutral phase question regarding three three phase without
    • Replies: 39
    • Forum: Commercial Electrical Advice
  8. S

    Maximum breaker size for DB (solar PV)

    Hi, Can anyone point me in the direction of the regulation / code for the max solar MCB size when connecting into a spare way of a local distribution board ? Eg. Is it possible to connect a 100A breaker into a 100A board ?
  9. RyanAspire

    A slight issue, reassurance wanted!

    [tl;dr] If an item of equipment wanted to draw 16A of current, would it be possible for something else to restrict this? i.e. If equipment wanted to draw 16A of current, is it possible it would only draw 10A (hence making it not operate as it should)? Due to something external of the...
  10. A

    How to determine the Line and Phase current and power of a three phase installation?

    I am attempting to produce a design for a theoretical installation with a three phase incoming supply (presumably Star/Wye with PME to star point), and am having some trouble understanding and determining the current and power of each phase, and the whole installation at the incoming supply...
  11. E

    Help with wiring three phase pool airblower

    hi. one of the electrition in our company tried to wire a three phase pool air blower {in star connection}. when he connected the three phases to the air blower after one minute the air blower coils were burned. the thing is before that there was another of one phase air blower and it was...
  12. M

    Upgrade to three phase supply

    Hi all, Newbie here with no electrical experience so please be gentle! :blush: I am currently refurbishing my basement flat and during this we have discovered that the supply to the four flats is single phase. I have been told this is unsafe and insufficient for the four flats. U.K. Power...
    • MichaelS
    • Thread
    • flats phase single phase supply three three phase upgrade
    • Replies: 5
    • Forum: UK Electrical Forum
  13. Leesparkykent

    Three phase TT install with distribution circuit and RCBOs

    I have an Install where a 16mm 4core has been installed previously. ATM the SWA is coiled up either end At the supply which is a barn converted in to an office for the homeowners business and plant room in new extension to the house. There is no PME available as over head, in the middle of no...
  14. T

    Three phase extension lead with single phase socket outlets

    I was flicking through the Scame catologue at the wholesalers today and noticed a picture in the catologue of a three phase extension lead, and on the reel it had single phase socket outlets on. It got me thinking, What would be stopping you wiring a three phase plug on to a single phase...
  15. N

    Wiring A Three Phase Contactor With 24v Coil

    Morning gents, Im trying to find a wiring diagram for a three pole (three phase) contactor, using a 24v coil. Ive found plenty with a 240/415v coil but none with a 24v coil. Im assuming theyre both very simular, only difference being you'd have to pick up your 24v from a different source instead...
  16. C

    Three phase inverter for three separate MPAN's?

    Morning all Just looking for some opinions on a situation we have for an installation. Essentially we have a three phase supply coming into a building that has been converted into three dwellings each with their own registered supply meter - one per phase. So the question is whether (and I...
  17. S

    TRAINEE QUESTION: Three phase motor system, non-standard wiring colours in flex?

    Hi. Just a question from a slightly confused trainee about core colours on a three phase appliance. I was diagnosing a fault on a three-phase saw today (found it - dead isolating transformer) and found that the incoming cable (4 cores) were coloured and connected as such: L1 Brown L2 Black...
    • sijmit
    • Thread
    • black brown cable colours flex motor phase question still system three three phase trainee wiring yellow
    • Replies: 10
    • Forum: UK Electrical Forum
  18. D

    three phase advice for newbie

    hello, I am after bit if friendly advise on 3-phase as don't have a lot of experience with it. 3-phase + N supply being fitted to a existing site as there is going to be a very large demand with house, outbuildings and swimming pool. the main intake and 3phase meter is in garage that is...
    • DavidWick
    • Thread
    • advice newbie phase three three phase
    • Replies: 6
    • Forum: UK Electrical Forum
  19. L

    Three Phase Calculaton

    Hi All Just a quick question as I can't remember. Does the following equation calculate the current per phase or the total current over the three phases? I(A) = 1000 × P(kW) / (√3 × PF × VL-L(V) )
  20. W

    Domestic three phase with single phase PV - net metering

    Another family member had a number of eco features added to the home when built a few years ago. This included a ground source heat pump, hence the three-phase, and solar PV. I had a look at the setup recently and observed the solar PV is single phase. Furthermore, it is on a phase with one...

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