3 phase

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  1. T

    Cable calcs 3 phase

    Its been long since I was in college doing cable calcs and obeing onsite as I've studied a completely different course at university, I understand de-rating factors but need some clarifying up to brush up. If I need a 600A supply which can be split 200A each phase. and being supplied via SWA...
  2. P

    4 or 5 pin plugs for 3 phase supply from inverter?

    I have recently bought a 3 phase bandsaw for hobby use and acquired a single phase to 3 phase inverter to power it. When I looked at buying cable and plugs/sockets for the supply I didn't know if I should choose 3P + earth or 3P N + earth plugs and sockets. What is the difference and which...
  3. S

    UK DOL Starter advice

    Hi all I would like a bit of advice to do with a DOL starter ill be fitting. Basically I'm replacing an old water damaged crabtree DOL starter with a new mcg DOL starter. The old coil was pulled in via a single channel heating timeclock and the new one will need to be too. The old DOL just had...
  4. T

    Bare 50Hz AC 3 Phase Bus bars...what is safe voltage to use

    Hi Hi, We will have isolated three phase bus bars. Fully Mains transformer isolated. (mains input is 240VAC phase to...
  5. G

    Convert to UK recognised electrical qualification

    Newly relocated from South Africa. Full 3 phase trade tested with a complete wiremans licence. Looking to get converted to a UK recognised equivalent.
    • Garethley
    • Thread
    • 3 phase complete equivalent get licence looking newly phase recognised south south africa tested trade
    • Replies: 2
    • Forum: The Welcome Forum
  6. O

    3 phase ring main in a tool room. X6 16A sockets

    Hi, I have been tasked with installing 3 phase ring main in a tool room. X6 16A sockets. Each pice if kit will pull no more than 5A. Planning on using 4mm SWA cable protected by a 63A breaker. Tool room dimensions are 7M X 5M. Any problems with this?
  7. 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...
  8. lloydy304

    3 Phase 4 wire

    Hi, quick question about 3 phase 4 wire systems. If I was wiring a single TP+N board all circuits running 230v very and well balanced and had a max load of 234A / 3 = 78A per phase. So removing all correction factors and sizing the connection tails a wire size of 16mm br/bl/gr/bl should be...
  9. R

    CamLock Box install - 3 Phase

    I am needing to install a CamLock power box to provide power to some equipment. Located in a commercial office building. The equipment is a robotic arm that requires 208V, 3 Phase Power, 30 Amps max. It comes with a controller and transformer. The overall power flow is as follows: Building >...
  10. D

    Concern re 3 Phase imbalance

    Could you please assist an end-user with limited knowledge:- The system we installed in our new-build is 7.83 Kw of PV with a 'Solax X3' 3 Phase inverter. A later addition was a Tesla Powerwall 2 with the later gateway. Following a series of short (2min) power cuts and lights flickering UKPN...
  11. B

    Seimec 3 phase motor plate shows wiring for 240v? Can I have 1 phase out of it?

  12. 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...
  13. J

    UK 3 phase domestic supply

    I watched this vid on Youtube. Interesting. They have 3 phase supplies. Does anyone know the cost of upgrading from a single to a 3 phase domestic supply? View: https://www.youtube.com/watch?v=uI7wxNtrorQ&lc=UgyPTN2d89tBByfm4Dx4AaABAg.9CrcYe7x50b9CsC6DnPJKw
  14. midsomerdave

    Motor wiring. 1 or 3 phase?

    Hello all. I have a problem that I'm sure someone can help with. The electric motor I have (pics attached) has no ratings plate. There are no supply wires shown, just the internal connection box wiring. The picture of the wiring diagram looks to be single phase but the box wiring has me...
  15. J

    3 phase distribution board

    I’ve got an old DB at work that I’ve had a look at and can see they’ve used the main earth into it and tied it to the neutral connection at the board is this correct?
  16. Mark42

    Does a 3 Phase socket supplying a Portacabin's 30mA-protected DB still need its own RCD protection?

    This month I'm building a remote lab for specialist chemistry work, in a self-contained 'Portacabin' type building. The cabin will have a new, Hager 3 phase board, with an 30mA RCCD main switch. It's only a single small room so I'm not bothered about the possibility of the whole installation...
  17. A

    3 phase

    Hi everyone i have recently had a 3 phase supply and board install in a domestic house, this will supply the house which has 12 circuits for light ring mains and ac units etc as well as in the future a 3 phase workshop, single phase workshop, 2 x 1 bed lodges, hot tub, solar panels and electric...
  18. robertl

    UK 3 phase inverter welder from Split Phase / Bi Phase supply 480v

    Hello all, I have discussed my power install before as i am sure a lot of you will remember as it is quite different to a normal setup. I have a split phase / Bi Phase system, 2 phases coming into the workshop from a center tapped transformer. 240v phase to neutral and 480 phase to phase. I have...
  19. A

    Megger 3 phase motor with thermistor

    Hi guys Do you carry out an insulation resistance test on a 3 phase motor with thermistor protection as you would without thermistor protection or does extra caution or process need carrying out differently? First time coming across one Thanks
  20. M

    Convert 3 phase into 3 single phases

    Hi there, I have currently started working on a farm and they are having a new 100a 3 phase supply installed. This is being terminated in an external enclosure. They then want to carry this 3 phase 150 meters to a barn and at this point split it into 3 single phase supplies. Is this even...

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