3 phase

  1. 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...
  2. ozgyrex

    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
  3. t01474

    3 phase EV headache!!

    Evening everybody. It’s been a while since I’ve asked for the collective brains advice but this one has really got me stumped. I’ve been asked to install a twin outlet 22kW EV charger at an office. Unfortunately the office is an old doctors surgery (3 storey ex-house, basement , pitched roof...
  4. S

    3 phase steam oven conversion

    I have retired from Solar installs and now finally looking to do my retirement project - Daimler V8 2.5. I needed some powder coating done but the cost for a few small items was ridiculous so I got into the DIY side. I found myself a 3 phase commercial steam oven (FINOX) which is massive so well...
  5. HappyHippyDad

    Installing a 3 phase rapid EV charger?

    A bit of an embarrassing question. I have a regular customer who I enjoy working for. He has asked me to install an EV rapid charger for his avant loader (electric tractor type thing). I always turn down 3 phase jobs as I don't feel I understand it fully, but I'd like to do this job. I believe...
  6. J

    3 phase board with 250A incomer

    Hi guys, if a 3 phase board is to be installed, with 250A mains. With 8 32A 3 phase sockets, 8 single phase 16A sockets, 2 light circuits and 3 phase 63A socket on it, that exceeds the 250A. I understand you would have to consider diversity factor etc into it but is that still too much or would...
  7. S

    3 Phase timer switch

    Hi all, This is a great forum, a big thank you to all those that made it possible, I hope you good people can help me: I have a 3 phase 10HP pump that I would like to turn on/off with a timer switch over a weekly program, looking online I can not find much other than some Chinese device...
  8. newfutile

    Strange IR readings on 3 phase board

    I am unable to take global IR readings on a 3 phase consumer unit, i have disconnected the neutral but when i try to measure the meter never settles and eventually times out. i have tried 2 meter/s with same results
  9. B

    single phase to 3 phase

    I have a single phase system that uses 320 amps and 240 volts and I rewire the circuits for 3 phase what size generator would I need and how many amps on each leg
  10. W

    3 phase conversion to 110 in residential USA

    Moved into remote residential site in USA , devestated 3 years ago by tornado that took house, family and all buildings, poles etc. except well building and barn (where I am living for now) only remaining service is a 3 phase that went to well. For about 6-10 months I need to survive here till I...
  11. A

    3 phase supply in a 3 bed detached rural house

    If I install a new TPN system at home can I run x3 100amp Supplies from It, so I have x3 100amp Consumer units, 1 existing & 2 new ?.
  12. R

    ungrounded 3 phase systems

    hello. looking for advice on working on a 3 ph, 3 wire 480 delta that i believe fits the definition of a corner grounded delta. the title of the thread is appropriate because theres only 3 wires marked for each phase and no neutral going into the customers main disconnect switch which powers a...
  13. N

    3 Phase Inverter Motor Vibration But Not Spin

    Dear All, My tool Carousel crashed last night and when I tried to initialize the Carousel, the Motor just vibrating (shake hard) but not spin. I am not sure if Break, Encoder or Resolver cause the issue. Please advise. Thanks, David
  14. N

    3 phase conversion on Car Ramp

    Hi All I am new on here and looking for some advice on converting a car ramp to single phase. This particular ramp is sold in 2 versions single or 3 phase. I bought a 2nd hand 3 phase version at very handy money so can justify a bit of spend on it. The 3 phase version i have has a 2.6KW 4 pole...
  15. P

    What is 3 phase bridge rectifier circuit?

    5 bridge rectifier circuit diagram ?????? 1. Three phase bridge rectifier circuit with resistive load 2. Rectifier circuit with RL load 3. Rectifier circuit with RLE Load 4. 3 phase rectifier bridge circuit using filter capacitor 5. Controlled rectifier circuit Link post...
  16. BiddeldyBwah

    Do 3 phase boards usually have RCD protection in commercial settings?

    Just sat contemplating life and realised i don't think i've ever seen any RCD protection on the boards we maintain/install at work. I've seen 300mA protection on some section boards but don't recall ever clocking a 30mA in a 3 phase board. Am i just not looking properly?
  17. N

    3 phase AC motor to a 120V speed controller

    I have a 3 phase AC motor that I have hooked up in low voltage it is supposed to connect to a 120v input 3phase 230v output speed controller I just don’t know how to hook it up. I think I have it right and will post some pictures down below but I would like to double check before I plug it in.
  18. Gunarosid

    3 phase power calculations.

    Dear all.. May be some body can help me to explain what happened with my generator set module. At my attach picture. According to S2 = P2 + Q2 is not correct. Can some body explain it.
  19. T

    3 phase motor reversing itself

    Hi I have a 3 phase 400v motor wired in star configuration it is controlled via a 3 pole 415v coil contactor which is switched simply via a stay put stop ... In for off Out for run.. ( Spanish design ) there is also a single phase fan connected between one phase and the star point of the motor...
  20. HappyHippyDad

    When does 3 phase supply become 230V in domestic consumer unit?

    I went along this morning to quote for an EVCP install. I thought it was a domestic house but it was a B@B. It has a 3 phase supply. I always pass on commercial or 3 phase as it is outside of my remit. However, I am toying with the idea of fitting this EVCP IF I can fit it from a single phase...
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