phase

  1. littlespark

    Phase loading in a chippy

    What can be worse than electrical installations on a farm, or in a pub?...... Chippys! Got a phone call from my local.... Lights and kitchen equipment not working... needs checked by a sparky before Scottish Power would attend. She'd blown a main fuse! So ive been tasked with working out the...
  2. K

    Wiring single phase motor

    hi Can anyone tell me where to wire the active and neutral wires to in this single phase electric motor
  3. R

    What diversity factor to be applied to a three phase food holding unit?

    Hi there currently doing some diversity calcs for college work and had a query about what diversity factor to apply to a 16A 3 phase commercial food holding unit. I'm thinking that this equipment will be only used in the day time(breakfast, Lunch and Tea (what we call the evening meal- dinner...
  4. Pastory

    WHY ISNT THERE A NEUTRAL WIRE IN THREE PHASE

    Why the main three phase doesnt have a neutral wire before reaching a stepdown transformer, how does electricity form a loop back to its source
  5. R

    3 phase (220 volt) pizza oven to 1 phase (220)?

    How can I convert a 3-phase (220 volt 5.6 kw) pizza oven to 1-phase (220) 2 heating elements, no motor.
  6. D

    UK 3 phase sub board addition

    Hi Looking at a job currently adding a 3 phase solar installation but the distribution board is full obviously a new board is the best option but if the customer isn't interested in this what do people usually do? Add a small 3 phase board and use Henley blocks, I've never seen this done but I...
  7. O

    4 pole 3 phase breaker

    I have above mentioned breaker which does not have any markings to show which is the neutral pathway, I wish to fit it directly above a 3 phase 4 way surge protector which has its neutral on the right hand side and so would ideally want to connect the neutral above it on the right hand side of...
  8. D

    Can I run a Phase 3 boiler from a split phase supply

    Hi - first-time post from a complete novice. I want to install a 24kw electric boiler on my property but that size requires Phase 3 supply. Northern Powergrid don't install Phase 3 in my area (off grid) but can increase capacity via a split supply. Can I run a phase 3 boiler from a split...
  9. N

    Soft Starters for Single Phase Submersible Pump

    Hi Everyone, Has anyone ever encountered an undersized start capacitor (from manufacture) for a single phase pump??? I would like to integrate some sort of soft starter for my submersible pump which pumps rain water to a tank. Is this possible??.... Thanks, NKC
  10. B

    3 phase voltage drop calculation?

    Hi! Once you've calculated the voltage drop in Volts - you divide by 400V for three phase right? For example: three phase 30kW appliance, 10mm 90 degree SWA, 45 meter run. 30,000/sqrt3/400 = 43.3A = Ib from the table 4E4B, a 10mm cable gives 4.7 So then 43.3 x 4.7 x the 45 meter run gives =...
  11. J

    UK Three phase dust extraction auto start

    Hello, I am currently working with 2 separate circuits, one for the dust extraction and another for a circular saw. Both circuits have an isolator with 3 phase and neutral then each goes off to its own dol starter. I was wondering if there is a way to make them both turn on at the same time...
  12. B

    Single and three phase current capacity and voltage drop differences.

    Hi All, From what I understand, working out the design current - Ib for single phase is quite easy (max appliance power/voltage). For three phase, do I take the max power, divide by 3 then divide by 230 to get the Ib? (We definitely use 230V for everything right?) Now for voltage drop, We...
    • bbudding
    • Thread
    • capacity current phase single three three phase voltage voltage drop
    • Replies: 7
    • Forum: UK Electrical Forum
  13. 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?
  14. Lucien Nunes

    How many phases? And another Lucien grumble: 'Amps Per Phase'

    When I joined this forum a decade or so back, there was a discussion going on about a welder that was connected with a 3-core cable to L1, L2 and earth of a 3-phase supply, operating on the 400V present between L1 and L2. The advantage of choosing 400V is the reduced current requirement. My own...
  15. C

    3 phase shed feed in NSW

    Gday lads. Have a question about a 3 phase shed feed. I have a roll on 16mm2, 3 core and earth orange circular. Can I run a 16mm2 SDI neutral in the same conduit. And anything I need to comply with in SNWR. 3 phase Will be for shed and mainly to run welder
    • chang14
    • Thread
    • 3 phase ausie elec phase shed
    • Replies: 6
    • Forum: Australia
  16. M

    Solar Maximum kW anyone has on single phase?

    I (well, the MCS installer) obtained approval under G59 back in 2015 for 11.5 kW of grid connection on a single phase. 12kW of panels into two 6kW inverters. I'm in a fairly remote area. Not aware of any other solar arrays feeding into my local pole mounted transformer. I'd now like to add...
  17. G

    UK Economy 7 meter out of phase

    My Economy 7 meter is running out of phase and gaining around 2 hours a day. Any ideas why this is? Thanks, Gez.
  18. T

    How to check if 3 phase is easily available for a flat ?

    My daughter lives in a flat in London in converted circa 1900 5 storey terrace in Bethnal Green. She is considering getting a Stiebel Eltron instant water heater fitted, however if she wants one that is powerful enough for a bath, she needs 3 phase. Are flats like houses in that each flat is on...
  19. T

    Mounting height for residential three phase dis board

    Hi everyone, this ones a first for me but weve been asked install and use a three phase supply in a large new build house. The 16 way dis board is going to go in a ground floor store / plant room and will give us either 48 single phase ways or a few less if we use some three phase 22kw EV's...
  20. S

    Solar 3 phase kva limit

    My client wants to install a 100kw solar system. He has 3 phase and 100 amp fuse installed on 200kva transformer. Is 69kw the limit on 100 amp fuse or can he go over without a limiter fitted? Thanks
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