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  1. Poolworx

    Single Phase 2 Speed Pool Pump Motor Question

    Hi everyone I came across a single phase 230v 2 speed pool pump motor the other ay and became obsessed with how they work and are internally connected , but cant seem to find a diagram/pic of the anywhere. I decided to do my own from what i found on line My question is have i interpreted the...
    • Poolworx
    • Thread
    • motor phase pool pool pump pump question single single phase speed
    • Replies: 20
    • Forum: UK Electrical Forum
  2. C

    UK I'll soon be installing a 45A 3 phase deep fat fryer at the school where I work.

    I'll soon be installing a 45A 3 phase deep fat fryer at the school where I work. The run is approximately 7m from the DB, and the cables will be enclosed in empty trunking. What size cables will I need?
    • colinsmudger
    • Thread
    • 3 phase installing phase school where work
    • Replies: 27
    • Forum: UK Electrical Forum
  3. B

    220 volt, three phase element

    I have a 3 phase element for a steam generator but the element is a 220 volt element. the diagram is in Chinese which i cant read. on the diagram it shows three phase delta connection for 380v and three phase star connection for 220 volt with a neutral connected to the star point. My question is...
    • Brandyne
    • Thread
    • element phase three three phase volt
    • Replies: 7
    • Forum: UK Electrical Forum
  4. N

    Merge 2 three phase DNO supplies

    Hi all, I was wondering if you could help me a sort out the problem. Is there any way (or device) to merge 2 three phase electrical supplies? We have 3x100A from DNO and getting 3x200A additional. Is it possible to do that without involving DNO ? The power is for new build 28 flats, we have...
  5. Peter55

    Earthing question - three phase into main building, then single phase to EV charger

    Hi there, new to the forum and in final stages of completing C&G level 3; need to complete design project to complete. Am struggling to get my head around how to draw up correct circuit diagram showing EF Loop path for EV charger where initial supply is described as 'three phase TNCS' feeding to...
  6. newfutile

    3 phase SPD MCB size

    Does anyone know what size cable to use for a MCG type 2 SPD (3 phase) and what MCB.the manufacturers instructions don’t state any values! also should i use 3 x single phase or a 3 phase MCB?
  7. D

    Where do you test from in phase rotation test on am2

    About to re sit testing section of am2. Am I required to test phase rotation at the incoming switch and also the 3 phase socket and motor. Just can't seem to find any clear instructions on what they expect on this test
  8. B

    Need to convert 3 phase 480 60 hertz to European 3 phase 330 50 Hertz

    Hi , I have a customer that has purchased a machine from Turkey. The machine requires 3 phase 330 volts at 50 hertz. I have access to 3 phase 460 at 60 hertz here at the plant in the US. I can find a transformer for the voltage but that doesn't change it from 60 hz to 50 hz. Im looking at 90...
    • BAHLONGSHOT
    • Thread
    • 3 phase convert european phase
    • Replies: 5
    • Forum: UK Electrical Forum
  9. N

    Bringing single phase off three phase board

    Hi all, new to this thread and just looking for some views. I have today attended a industrial unit which is being converted into small individual offices. An electrician has previously been here and has taken 3 individual sub mains from the existing three phase consumer unit to single consumer...
  10. J

    3 phase rotary inverter from single phase.

    My 3 phase cnc lathe is rated at 27 Amps on the manufacturers website. When I mentioned that I want to run from a single phase via a rotary inverter I was told that it will need 27 A per phase therefore 3x27=81 Amps from my single phase. Is this correct? I reckon the machine is about 5hp.
  11. T

    Is there such thing as 4kW, 115VAC , single phase equipment?

    Hi, We are being asked to make a power supply for a Bass amplifier......its 4kW, from 100-265VAC. Does that sound right? Woudlnt 4kW from 115VAC always be done with three phase? (this kit is for mulitple different countries)
  12. i=p/u

    Single phase motor humming and heating up.

    Hi, morning EF. I was looking at a single phase motor yesterday attached to hydraulic pump for cardboard bailing machine that seems to be temerpemental with stop and starting and making humming sound. I checked the contactor was working first and voltage was going to motor, I clamped the cable...
  13. M

    Costing running 3 phase motors

    Been asked to cost the running a number of motors . Was going two amp test each phase and multiple by line neutral voltage to get kWh . Is this correct .ta
  14. R

    3 phase sub main…help please??

    Hi All I’m in a bit of a quandary at work and need a couple of things clearing up if poss. I’m the maintenance manager/spark/fitter/skivvy/everything else that needs doing man 🙄 in a plastics factory and I’ve got to provide a supply for a new machine. The current set up is a 90mm SWA protected...
  15. W

    Proteus 3 phase DB horizontal

    Have any of yous fitted the proteus 4 way 3 phase DB? The horizontal one. The din rail I got with it was very narrow, only the top off of the RCBO clipped onto it. Anyone else had this?
  16. bigspark17

    Ramp up down switch single phase motor

    Weired one. Looking for info or past experiences. Called to a garage very old ramp 40+ yrs old not working. Very old switcc looks like its burnt out, so before i take on finding a replacement i wanted to make sure motor ok. So bypassed up down switch and turned on isolator. (Single phase motor)...
  17. P

    Looking for an easy-to-understand explanation of 3 phase / 3 phase + N

    I have some questions about 3 phase. 1. Does the neutral come in with the supply as standard? 2. As most 3 phase equipment doesn't require an N, what are the circumstances where you need one? 3. When we do need one, why do we need one? 4. Am i right in presuming therefore that we'd mostly use...
  18. Spinball

    UK Do I need three phase or not? Your advice appreciated.

    Hello folks. I am about to complete on a (detached) house purchase and I want to ask your advice whether to have three phase connected to the house and possibly whether I can have it connected for free. I plan to have two Zappy EV chargers installed with them both charging at the same time...
  19. C

    Split Phase and Smart Meter

    Hi we have a split phase supply and had a EDMI ES-30B 3 phase meter fitted. Our readings are extraordinarily high. It is an old farmhouse but there is just myself and my wife and we are using 29,565 kWh per year. 81 kWh per day. We just have an electric shower, electric cooker, appliance like...
  20. O

    3 phase lead-in minimum gauge

    Hi guys, We're starting a build in Queensland of an all electric house and will have some pretty large loads so we're hooking up a 3-phase supply. Some of the large loads include a 22kW 3 phase electric vehicle charger, 3 phase ducted A/C, heat pump pool heater, heat pump HWS, induction cooktop...
    • ozgyrex
    • Thread
    • 3 phase ausie elec gauge minimum phase
    • Replies: 2
    • Forum: Australia

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