phase

  1. A

    How three phase is used as two phase here?!

    Hi everyone, I am having trouble in understanding following schematic. How only two phase are used for load and what happened to third phase here. TIA
  2. M

    Single phase but 2 cable in one fuse

    Hi everyone There is a switch board which is single phase, but when you look at the back you will see 2, 16mm cable go to the fuse(red and white). What is that for ? I haven't seen before. And the black and blue cable goes to the service neutral link !!! In Australia 3 phase color is Red White...
    • Mahdi1
    • Thread
    • ausie elec cable fuse phase single single phase
    • Replies: 1
    • Forum: Australia
  3. E

    Any good resources/videos for 3 phase or industrial stuff?

    I've been watching Residual Current on youtube (great vids and great bloke btw) and really love watching the more industrial/commercial side of things. Are there any resources that teach how 3 phase works? Even college syllabuses seem to be very light on 3 phase stuff. How do people learn this...
  4. P

    Sizing and renting a 3 phase generator in Wales (in the UK)

    Hello everyone, I really hope this isn't an idiot question but boy, I'm out of my depth! I've spent about 3 weeks (not solid mind) trying to work out how to size a generator to power a lathe for a test. Situation is, I'm buying a house in Wales (UK) with a restored lathe in it. It's 3 phase...
  5. G

    3 Phase Advice

    Hi All I haven't done any 3 Phase work for some time but I have just been asked to wire up a new woodworking workshop. There will be 6 - 7, 3 pahse machines all ballanced load machines (4 pin plugs, 3 ph & e) 3 - 4 single phase machines, 2 x 32A ring socket cicuits and a couple of lighting...
  6. G

    New 3 phase supply

    I am in the middle of installing a new 3 phase system for a small bakery production area, new building, 200 KVA supply in total. 200 TP for workshop plus 4 separate 60 amp single phase supplies for new flats above new workshop building. Checking with UK Power Networks they inform me that the...
  7. F

    3 phase compressor DOL wiring

    Hello. I bought an old three phase compressor but it has come without a starter switch. Just five cables, two for the pressure switch and three for the three phases. I have a DOL starter switch, but I don't know how to wire it to make the compressor come on and off with the pressure switch...
  8. Z

    Three phase motor help

    Hello all, I recently was asked to quote a three phase motor install within a pallet factory. To be honest, I was somewhat stumped in how to attack it as the sheer size and the control cabinet was gigantic. Although I'm mainly a domestic, commercial spark, this was somewhat out of my league. The...
  9. R

    A phase is only giving 41v im told

    Hi guys I know I don't exactly contribute much but can anyone maybe stop me killing myself tomorrow. I know to do the 10 point 3 phase dead test And I know how to test each phase. I've had the job below come in and I wondered if anyone can give me some advise. I've never had a job like...
  10. J

    3 Phase Socket in Refrigerated Area

    I have been asked to fit a 3 Phase 32 amp socket in a refrigerated area thats under construction. The cables will be on the walls and then a lining company is to come in and install 100mm thick panels 30mm from the wall all over to create a insulated box. inside the unit. The panel guys will...
  11. robertl

    Digital phase converter build?

    Hi all I am looking at three phase conversion options for my workshop I have looked at rotary converters and I have also looked at static and digital conversion options what I'm wondering is does anyone have a digital converter from the only manufacturer that makes them. Drives Direct is the...
  12. K

    AM2 testing phase rotation

    doing my am2 this week and forgot to ask at my prep day about phase rotation, will I need to do it on the incoming supply also will I need to it anything else like the motor or three phase commando socket don't touch 3Phase a lot so abit unsure
  13. timhoward

    Practical question about 3 phase IR testing

    Regarding 3 phase IR tests for initial verification, I'm wondering how people actually do it efficiently. GN3 says to IR test between all phase permutations, then: L1+L2+L3 connected together to N L1+L2+L3 connected together to E N to E The OSG further comments that if the group test to earth...
  14. G

    Three phase Type A RCD confusion.

    Was testing a EV charge point today and noticed the internal RCD was TP device with only a single phase supply and load in use (L1). There was 245V either side of the RCD but the test button didn't function.!! Is it possible the test button is fed from one of the phases that is not used...
    • GBDamo
    • Thread
    • confusion phase rcd three three phase type
    • Replies: 4
    • Forum: UK Electrical Forum
  15. L

    Modification of 3 phase board

    Hello, wanting to install a new (old) MCCB in an Dorman Smith Loadline board, found a couple online, however, the client ordering the works is not keen on installing old breakers, so they would rather us connect tails onto the busbar stubs where the breaker would usually be, fashion some kind of...
  16. R

    4pole isolator on single phase

    Hi, I have been asked to fit a 32a isolator ready for an air con unit and picked one up from screwfix. Unfortunately the one I have is a 4 pole, can this still be used with 6mm t&e or do I need to replace it with a 2 pole. If it can be used do I just use terminals L1 & T2 Thanks
  17. J

    UK 3 Phase RCD?

    I have recently started on a site where there is a 16A 3 phase Atex socket which is supplied by a 16A 3 phase MCB. It was picked up on a recent inspection that it needs an RCD. For the life of me I cannot find a 16A 3 phase RCD. I started to think does it really need an RCD? The socket is only...
  18. A

    How to do Troubleshooting on Phase Failure ?

    I met with the following case and get stuck on how to troubleshoot and repair the following problem:- The location is a town house in a complex, with a 3 phase supply. The client has been living in this premises for 20 years. Recently ( 9 months ago) they have renovated the house and have...
  19. Mark42

    Multiple control stations for one three phase compressor. Best practice?

    I'm refurbishing my own workshops and fitting a new central three phase compressor and three phase dust extractor. Both these appliances will be controlled by remote START/STOP switches, next to multiple compressed air and vacuum points, which may be in different buildings. For future-proofing...
    • Mark42
    • Thread
    • compressor control multiple phase practice three three phase
    • Replies: 16
    • Forum: UK Electrical Forum
  20. I

    Appliances in single phase property damaged by 415v

    Got an emergency call out from a very worried old lady the other night - the power at her apartment had gone off and the kitchen light was smouldering badly. She'd been on the phone to the DNO (Northern Powergrid), they were telling her to turn the main switch off but she couldn't understand and...

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