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three phase

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  1. D

    Hagar rcbo’s in three phase board

    Has anyone had this issue before ? Was working on a three phase board, when I took the cover off I noticed a black spot on one of the rcbo’s. it happened to be smouldering and started to catch a light. I noticed another rcbo smouldering too. I instantly turned off the main switch as one of the...
  2. G

    Thoughts of experts welcome - ancient three phase install?

    Thoughts of experts welcome. The first smart meter installer walked away as he wasn't three-phase qualified but i'm wondering whether we should get Western Power out beforehand or whether any other work would be recommended. Not sure what the supply box on the right is feeding and I think Noah...
  3. E

    How easy is it to convert a house from single to three phase ?

    I am thinking of having a car lift (that uses three phase supply) installed in my house, my house is single phase, what are my options?, what would be involved?
  4. Vortigern

    Bit of a mystery to me, any ideas? Fault on three phase Merlin Gerin

    Outage of main three phase primary switch box for one of three buildings on commercial site. The building houses around 30 commercial units. Switched back on the main switch, power restored. Except for one unit. All units supplied through the secondary sub switch box. Large MCCB MEM type. Three...
  5. S

    Wiring a 2.2kw compressor

    Hi guys, Been asked to wire in a compressor to a mates small unit. It’s 3phase 415v 2.2kw. There was previously a compressor installed... and what I have in place from the board is - 40A MCB with a 20m run of 4mm 4 core + earth SWA, to a non protected 32A isolator switch mounted on the wall...
  6. 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...
  7. J

    UK Three phase (No neutral ) EFLI testing on an RCBO

    Hi I have a MFT1553 Mega tester. Is there a feature on the tester to test 3phase RCBOs when there’s no neutral present? Pretty sure mot. Was wondering if i could temporarily connect a neutral on a Wander lead and use the three wire test method? Thanks John
  8. J

    UK Standardising on site to TP & N Sockets rather than TP and no N

    Hi I have a site where they have some sockets fed via Three Phase and Neutral and others TP with no N. Rather than both types of sockets for both types of appliances, was looking at 'standardising' and upgrading all plugs to TP and N. And where the appliance did not need a N, it would be left...
  9. O

    UK Single or Three Phase Identification (Vehicle Lift Content)

    Good morning all, I’m afraid that I’ve come here looking for some advice with a problem I have with some vehicle lifts that I have been asked to dispose of. I have listed them for sale, but I am not sure how to determine whether they have single, or three phase motors. I am now aware that any...
  10. V

    three phase board separation

    hello everyone, I have a little problem. I've got a three phase board, it has the three phase sauna, one phase lighting and sockets connected to it. The problem i am facing right now. This is a comercial unit. So the problem is that the sauna makes the RCD trip every so often. And the board...
  11. U

    How can I connect a three phase manuel change.

    I want to do connection for three different power source in my house. Community solar, Personal solar, and a Generator. They are all single phase. Please help me how to connect it in a three phase change over.
  12. CokeCanBrad

    UK Three phase testing PFC

    am i correct in thinking for determining the PFC, you can do a PEFC test aand PSCC test and which ever one is highest you can double and choose to be your PFC also is it true for 3 phase that PSCC Is usually always higher? Ive seen some people croc on to the earth and croc onto the neutral and...
  13. N

    types of earthing to be carried out for 3 phase standby generator which is separately driven system

    3 phase standby generator of rating 30KVA is to be install in the lightning prone area. The utility main line is TT arrangement where neutral point is grounded with 3 phase and neutral wire provided to load system. A separately driven generator ( standby generator) is also needd with TT...
  14. R

    UK Three Phase wired machine ohms law calculation

    I have a machine which is wired as 3 phase neutral and earth and is 15.1KW, there are no 415v components and all components are 230v, so effectively it is using 3 single phase circuits, however I have always carried out the circuit breaker calculation based on the 415V potential, I.E> 15120W...
  15. S

    Workshop Q light gauge 220v can a 3 phase 415v connection be made up?

    Hello again and Happy NY all. I have decided to take a small piece of family land and erect a house ( live for a few years) As part of this, i have to do a lot myself, joinery carpentry etc. I have access to a rural farm workshop to conduct all, its dry but the electrical connection is run...
  16. R

    Three phase or single for new installation?

    Hi all, I've just registered to seek a bit of advice and am sure I'll be looking for lots more help soon. I've just bought a plot of land near Hastings that I'll be building a workshop on for personal hobby use - there's no other building on site. I'll be doing some welding as well as having my...
  17. S

    what do these 380v wiring colours mean, I want to use with a 220v vfd. it may have had speed control

    Hello, I am a woodworker who has got a large old power feed, its 380v and i want someone to rewire to a 220v vfd for me, can someone please tell me what these old colour codes mean. I bought the machine in Scotland.I can't find any easy diagrams online.I think its a good few years old.Thank you...
  18. naylorpd

    OWL Intuition - worth the bother?

    I have a three phase supply in my house in Azerbaijan. The incoming cable from the meter is 4x35mm SWA with a 120A DNO breaker, CU is a Schneider Acti 9 and I have earth rods buried in the garden. I did all the electrical work myself apart from first fix cables in the house, in about 2014...
  19. gazdkw82

    Three phase polarity test

    I have my AM2s coming up and i am a little confused to the live polarity test on a 3 phase circuit. It's the first live test and I dont want to fail on what is a simple test. I know how to perform a live polarity test on a single phase circuit but unsure on the procesure for 3 phase. Is it just...
  20. A

    UK 2armours supplies dist board

    Hi, wondering if anyone has seen this before. At a job today and the supply to the 3 phase dust board is 2x16mm armours. One has three phases in it the other armour has the neutral and earth. Bit rough I think is there any regs on this ? Any help would be great.

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