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single phase

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  1. Mark42

    32A single phase output from 3 x 16A three phase supply. Is there a way?

    I have a workshop in a remote location which I rent out. The incoming supply is 3 x 16A three phase on 180m of 16mm SWA. An upcoming customer has a machine which needs a 32A single phase supply. (Actual load about 25A.) The energy is there, but it's split across the three phases. Is there some...
  2. M

    Can a 3 phase motor that is running on single phase have 2 directions?

    I am needing to know if this wiring diagram is showing a few things: 1: Does this show a 3 phase to single phase conversion? 2: Does this show that the motor can turn in 2 directions with the same internal wiring if you toggle the SPDT switch?
  3. J

    NICEIC Certification Scheme Advice please - Certification for competance in basic single phase installation

    Hi all. I am looking for some advice. I am looking to become certified to install consumption measuring devices in small businesses. I have many years of expereince on basic single phase supplies includiing consumer units etc, assisting my father's company when he's snowed under but never...
  4. R

    Fitting a single phase Matt:e for car charger

    Evening all, Just After some knowledge about the Matt:e. I have been to a job where a 13 amp Rolec car charger point has been fitted On an external garage wall which is attached to the house. I can see no evidence of an earth rod and I am assuming it is still connectEd to a pme earthing...
  5. P

    What do I need to know to calculate size of single phase motor?

    About 20 years ago I bought an old table saw from a local school. I only had single phase at the time so I changed the motor and switchgear as it was 450V. I'm thinking of buying a 3 phase 50s bandsaw and have the same problem, but I can't remember how to work out the size of the replacement...
  6. HappyHippyDad

    Is this single phase as well as 3 phase and what is it's power rating?

    Evening all.. A friend/customer has just asked if I could connect up this commercial washing machine down at his domestic stables. He has had it in his house for 10 years. Recently it has started tripping the B40 MCB. It does not trip immediately so I don't think it is the inrush, plus it did...
  7. D

    Can you use a single phase motor to create three phase power.

    This might sound like a stupid question so apologies in advance. So I had a random thought in my head. So I was wondering if I was to use a single phase motor to spin a three phase generator to create three phase power, would you be able to create more power then the single phase motor is...
  8. M

    Can I Just replace a 3phase motor with a single phase on my lathe?

    I have a metal lathe, 1.5hp, 3phase, 575v motor. Can I just replace the motor with a single phase,220v motor? Would all the lathe wiring , switches, relays work? IF so, what HP motor should I buy? Thanks,
  9. D

    I need help with how inductance works in a single phase transformer

    I currently have this, Primary inductance on an AC transformer will determine the magnetizing current on the unit. Usually inductance is relatively high so the magnetizing current can be as equally low. This inductance can be seen as part of the magnetizing current; however, it will not be seen...
  10. H

    Can you use this 3 phase device on single phase

    Hi there I purchased goods to build a sauna back before Christmas and only now am I getting around to doing it. I was just looking at the heater controller and noticed they they’ve sold me a unit that says it is for a 3 phase/400v supply. I did make clear I only had single phase as many...
  11. F

    No isolation of Neutral in Single phase boards

    As title. Doing an EICR, have come across a couple of DBs, where the neutral goes straight onto the bar on Single phase boards. Whats your views on this guys? Should it have a requirement to be isolated? Is there a reg for? If so then it can be coded. My boss thinks its dangerous. I don't, but...
  12. A

    choosing cable voltage rating

    Hi, for a single phase LV installation, how do you determine whether to use 450V/750V or 0.6/1kV cable. Thanks
  13. I

    Single Phase 230V supply and 3ph Compressor install.

    Hi guys, Have an option of an old, but really solid superb condition and well made large +/- 200ltr compressor from Denmark. Rarely used since purchased/Build 1987. Only supply I have is 230V Sing/Ph. Never had any dealings with 3 Ph. First name plate. Grundfos 3~MOT MG90LAR-24F115 No...
  14. S

    Earth Fault at 240V Single Phase System

    Hi... I am Shamsul from Malaysia I have a question regarding to earth fault current if occur inside 240V single phase customer house/building 1.May explain how the earth fault current flow route 2.If got local earthing was connected from ground to 11kV 3phase DEAD line, is it the fault current...
  15. F

    VFD Single Phase in and out

    Hi there I preface this query with: I am an almost complete electrical novice. I need to control the speed, startup and slow down of a 2100W induction AC motor through a VFD. My workshop has ordinary Australian 240v single phase supply. I can find plenty of VFDs that convert single phase to 3...
  16. J

    Single phase supply

    If I have a 240/480 volt dual voltage single phase motor connected by 2.5mm 2c+e to an isolator and then just 1mm flex coming out with active, neutral and earth connected is it possible the power supply to be 480v or is it most definitely 240v
  17. robertl

    3 phase 2 speed motor from single phase

    Hello everyone I have just bought a new lathe, (used) its on its way to me from other end of the country now. I have only just realised i may have an issue. The machine is 3 phase and i was intending to go down the VFD route but because its a dual speed motor im not sure i can. See attached...
  18. C

    Single Phase AC MOTOR stuck

    I am trying to fix a single phase ac motor but need some help. When powered on and put off load, motor humms but doesnt rotate, its sort of magnetically locked because even trying to rotate by hand it very hard to turn (motor was removed from housing and therefore I have stator and rotor...
  19. D

    120/208 on single phase panel

    I’m replacing a timer based contact for a restaurants outdoor building lights, sign, and parking lot lights. The panel feeding the old timer contact equipment has a black phase, a red phase, a neutral and a ground. Each leg has 120 volts to neutral but has 208 volts between the two phases. Is...
  20. M

    how to make a single phase generator tns

    how to make a single phase generator tns

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