3phase

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  1. M

    Screening of a 3phase cable

    I have a 3 phase cable with overall and individual screens. The cable goes from a switchboard to a transformer. How do I connect the overall screen and the individual screens? Connect on swbd side and at transformer loose?
  2. D

    UK 3phase help

    Hello everyone, I am an artist and have a picture framing machine that is 3phase, bought it years ago and not sure if it is working and just want to test it. At my unit I have a 3phase consumer unit but no 3 phase power socket only 230v sockets. Because times are hard and I want to save money...
  3. D

    3Phase wiring into single phase supply

    I'm looking to install a traditional coffee machine which has total power 3300w and the wiring supplied with it is brown L1, black L2, grey L3 & Neutal with earth. How would this need to wired to operate on a single phase 16Amp supply?
  4. P

    3phase to single new pump set

    Hi all, been a member for a while but this is my first post so hoping you can help. Been asked to install new twin set of pumps. Pictures attached of old pump (3 phase) and new pump (single phase) and the contactors And overload for the pumps . Best and easiest way to change to single phase for...
  5. Zdb

    3Phase PFC

    After having a discussion with a colleague earlier today I was wondering what peoples preferred method is when testing prospective fault current on a three phase distribution board. Do you: A. Perform a 2 lead test between L1-E, L2-E, L3-E, L1-N, L2-N & L3-N then double the highest value. Or...
  6. T

    16mm tails on 3phase

    Evening all Guy who owns a small industrial unit currently has 100amp 3phase At the moment he only have a single phase baord with feeds a few lights and sockets. He wants to install a 20a 3phase supply for a something The mem 20a 3phase switch fuse i got only allows upto 16mm tails and not...
  7. T

    SWA cleats for 3phase

    Does anyone know what size SWA cleat fits around 4 25mm tails and 16mm Earth? Need to hold some tails back for a 3phase board i have just done Cheers
  8. S

    6kw appliance - 3phase warehouse 13A twin sockets

    Hi Lads, You might think i'm a di*k already from the forum title but I desperately need some help. I've got a small business and if I wasn't skint, i'd obviously have an electrician come to advise me. I added some kitchen equipment to the warehouse - most of the equipment can plug in to the...
    • Simon0654
    • Thread
    • 3phase appliance sockets twin warehouse
    • Replies: 8
    • Forum: DIY Electrical Advice
  9. S

    Volt meter reading 760volts in 3phase dol starter overloads

    Hi I have been called out to a fault on a grain dryer where the motor interlocks are not disconnecting. Previous conveyors. Upon investigation I have found one starter that does not disconnect the preceding motor but when tripped I am getting 550v to earth from a1 and wait for it 760volts to...
    • Sparky42
    • Thread
    • 3phase dol meter meter reading reading starter volt
    • Replies: 42
    • Forum: Electrician Forum
  10. M

    overheard conversation re 3phase working

    3 people were discussing scheme membership and insurance and it sounded like eiher 'domestic installers,' or their insurance, does not cover work on 3 phase installations. Some 6 months ago I was informed that all WPD supplies to new properties are to be 3 phase and this is now what is being...
  11. S

    3phase RCCB used no Neutral

    Question for someone... recently inspected a 3phase 415v supply socket and noticed it's protected by a 40amp 30ma rccb... Income supply only has 3phases and earth and on socket side requires neutral... Surely this RCCB isn't doing it's job if the neutral is not fed through protective device...
    • Savdar1810
    • Thread
    • 3phase neutral rccb used
    • Replies: 11
    • Forum: Electrician Forum
  12. E

    3phase cut out for Isolation

    Hi Guys, Have a situation with a Wylex 60A single phase switch fuse isolator that is overheating & conductor insulation is burnt. It is supplied by 25mm tails from a henley block. There are also more henley block connections across all phases which I don't like at all. Anyway, for safe...
  13. A

    100ma 100amp 3phase main switch on TT system and rcd protection on the rest of the circuits question

    Hi all , my question for your brilliant minds is (ill first set the scene) 35mm 4 core swa coming from an external supply, 16mm earth ran out to an earth rod(ze at the distribution board main switch 0.35ohms) now this is quite a large installation with a 3phase distribution board in the...
    • andysparkfree
    • Thread
    • 100amp 100ma 3phase circuits main main switch protection question rcd switch system tt system
    • Replies: 3
    • Forum: UK Electrical Forum
  14. J

    3phase dis inb domestic setup

    looked at a rewire of a 4storey property today (lower,ground,1st,2nd) they is a 100a 3ph head on lower floor- and there is 2x seperate SP c/u (think there use to be 2x flats) but is now going to be one house best option?... to install something like a 8way 3ph amd3 dis board by the head on...
  15. A

    PME head , builder forgot earth cable , 100amp 3phase supply , 10 bedroom house , 10 bedroom house

    Hi all , im new here but have always looked for answers over the months description of my question there is an external 100 amp 3 phase metered head that this new 10 bed house is to be fed from , the builders installed a 35mm 4core swa as i directed however they forgot about a 16mm earth now...
    • andysparkfree
    • Thread
    • 100amp 3phase bedroom builder cable earth house pme supply
    • Replies: 117
    • Forum: The Welcome Forum
  16. P

    Site transformer 3phase to 110v

    I need a couple of 3phase site transformers for a job which will last 6 months. Hiring or buying new will be too expensive, so I'm after getting a couple of second hand ones. I can collect within a 60miles of Leeds or 30 miles of Dublin. Spec. 8 to 10kva continuous. 3phase input, 110v output...
  17. O

    3phase Motor wiring 480/208v

    Hi all, I have a machine that I believe was connected to 480v, I need to connect it to 208v. It is a German built machine with Seimens motors and I have no information on it. I have taken one motor apart and find the wire terminology different from what I'd expect, I expect to see T1, T2...
  18. D

    single phase into 3phase trip switches/contactors etc

    Can I wire single phase into 220-240V 3phase trip switches/contactors etc. What I am trying to do is protect a 220v-230v encoder but want the earth wires to look neat. professional looking. Please see picture below
  19. T

    EU's doing away with 3phase Pumps and motors

    This is starting to get right on my !! Now. Needed a few pumps in the last few months, which wasn't the easiest of jobs getting like for like. But now I can't get them or any for that. All the pump and motor manufacturers are only supplying single phase motors wdf. Some --- in the EU/ G12 or...
  20. michaelw6

    commercial industrial zs mccb 3phase question TN-C-S.

    Im specking a large 480a cable over 160m ive done cable calcs and come up with 2x 120mm 70c armored. now Im trying to work out my max zs...with no avail. my main ze is 0.17 but my mccb is saying max zs of 0.054 and my mccb will not trip... why is it so low? its impossible to get my zs less than...

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