3phase

  1. W

    Home Lathe with 3 Phase inverter tripping mains

    Hello - hope someone can advise please. I have a recently purchased second hand Myford lathe which has a 3-phase inverter (Siemens Micromaster 410) Lathe all works fine but regularly trips my RCCB 80A 30mA breaker taking out half of the board - usually when first powering on. The inverter is...
  2. Kyle808

    Could anybody help me diagnose this problem?

    Hi I have a 3phase shop in a high humidity area in (Hawaii) and I'm having some issues with low voltage on the single phase outlets on the 120v side. Every once in a while the electric goes out on the regular outlets but the three phase works perfectly fine. Usually at night all the outlets...
  3. will_505

    3phase 32amp socket swap for 16amp

    Hi there, I've got a 3 phase compressor and a small 8500W single and 3 phase generator. My compressor has a large 32amp plug on it but my generator only has a 16amp socket so my question being can I swap the 32amp plug to a 16amp plug? Sorry if this is a daft question. Thanks guys 🙂
  4. newfutile

    3phase DB as single phase

    It's coming out anyway so it's a rhetorical question. What do you you all think of this? Bits of wire used to bridge the bus bars and don't single phase consumer units need a linked switched line and neutral?
  5. T

    Electrician Jobs Electricians required in Rotherham in the next 2 weeks .

    Please respond with questions and availability.
  6. S

    Advice on 3Phase Hob

    Hi there I have not done a huge amount of work on 3phase. I am installing a Induction Hob as part of a new Kitchen refurb- to be specific the hob is NEFF T59FSRX2. It is a 11,100W with the ability to power limit and support single or three phase connection. NEFF have not provided great...
  7. C

    All devices on 3phase board tripped simultaneously

    A customer recently lost power to part of their electrical installation. On arrival I found all IEC 60947-3 devices had supposedly tripped - including the main switch rated at In 400A. Excluding the possibility of someone tapering with the board, can anyone think of any other reason why this...
  8. OnlQQker

    Balancing 3Phase.....

    I was speaking to an Electrician a few years back as he was balancing out a 3 phase supply. To me it sounded like he was trying to get close to each phase supplying roughly the same Kw's to both of the lines/live/hot. Is this correct, if so how close do you have to be in this balancing stage...
  9. H

    All electric flat require a 3phase supply

    Hi! Currently doing a job that they have decided against getting gas meters and going all electric. Electric boiler 9.5kw 2x shower 9.5kw Hob say 6.5kw 2x 32a ringmains 2x 6a lighting circuits I understand they have had a 13Kva supply installed. Obviously this will not be enough to run all...
  10. L

    3Phase Motor breaker - overload schematic

    Hi all, I recently bought a CNC router and dust collector and need to connect it to my 3x380v+N power source. I want the CNC router connected to the under/over voltage protection and the motor also connected to the overload protection. Can someone please check if I connect the machines as in my...
  11. R

    Feeding domestic db from 3phase db -advice please

    Hi All So i have just got a job of doing a rewire on a small flat, which includes change of DB etc... Currently this is fed from a 3 phase DB in a commercial premises below. The feed cable is over 25m long (16mm T&E). the client has asked for a sub main tennant meter to be installed. At the...
  12. M

    Can I Just replace a 3phase motor with a single phase on my lathe?

    I have a metal lathe, 1.5hp, 3phase, 575v motor. Can I just replace the motor with a single phase,220v motor? Would all the lathe wiring , switches, relays work? IF so, what HP motor should I buy? Thanks,
  13. 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?
  14. 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...
  15. 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...
  16. 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...
  17. 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...
  18. O

    3phase but using only 2

    Hi. Just having a moment and doubting some work that I have done. Although discussed with a couple of other sparks and niceic tech line and they said was the right way. House had a single phase board and a 3phase for old storage heaters. Storage heaters out and replaced for lower cost...
  19. G

    3phase inverter on domestic supplly

    A friend of mine is building a workshop out his back. One of the machines is 3-phase with a 7.5ka load. It's a 40m run from his fuse board in the house to the one I want to put in workshop. There is only going to be a 2 twin 5ft flossys, 6 double sockets(no big load just hand tools, radio...
  20. B

    Help 3phase dishwasher

    Hi guys fitted a commercial dishwasher today extended c/w supply made drainage alterations etc.Being a helpful stupid bloke connected up cables.Didnt know neutral changed from black to blue so have connected up incorrectly none of the breakers tripped am I in the brown stuff or not im a plumber...
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