phase

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  1. A

    Three phase cable to wire single phase

    Can I use three phase cable to wire single phase
    • ambr111
    • Thread
    • ausie elec cable phase single single phase three three phase wire
    • Replies: 3
    • Forum: Australia
  2. O

    Strange box attached to 3 phase meter

    I didn't get a picture so will have to wait until I go back again but I've done a crude drawing of what was there. Its in a commercial set up with a poly-phase meter, the distribution board and switchgear were all quite old but the meter looked fairly new, it was the usualll 3 phase in and 3...
  3. happysteve

    3 phase cooker - idiot check

    I'd appreciate a quick sanity check, thanks in advance: New circuit for a 3 phase cooker, in a community centre (run by a charity). Total load 16.5kW: L1 27A, L2 27A, L3 15A. (6kW oven, 6 hotplates: 3x 2kW, 3x 1.5kW). Commercial setting so no diversity: 3x 32A OCPD. (?) TN-C-S, so Zs...
  4. P

    3 phase 380V welder to run on a 3-phase 220V power

    I have an old Migatronic Automig X 200 welder configured as 380V 3-phase unit. Migatronic for spec. I have a 220V 3-phase point in my garage, but that does not work well, obviously. What would be the best option to get this welder to work? Would it be possible to rewire it so it can work on my...
  5. bigspark17

    3 phase surge on reenergising panel board

    Hi all.. Bit of a nightmare afternoon,, testing a caravan park TP&N panel board IR testing while board isolated before returning power (merlin gerin panel board) over the next 30 mins customers on park are reporting loud bangs inside some of there vans, boilers and electric fireplaces (with...
  6. T

    AC Single Phase Motor - Expected Amp Draw

    Hi Forum Members I have a 4 pole single phase 240VAC 315 watt motor from a central heating heating system that I think is bad. It's the room fan inside the squirrel cage that sucks / pushes the air past the heat exchanger It seems to run but very slowly. I think it's bad. That said, there is...
  7. D

    3 Phase requirements

    Hi all i have asked a electrician about the mic level i would need to power the following machines a 45kva cnc mill, a 32kva cnc mill and a 60 kva cnc lathe but have been unable to get an answer. I would like to get the 45kva mill and the 32kva mill sorted first it will be 6-12 months before i...
  8. 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...
  9. 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
    • KenWall
    • Thread
    • motor phase single single phase wiring
    • Replies: 1
    • Forum: UK Electrical Forum
  10. 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...
  11. P

    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
    • Pastory
    • Thread
    • neutral neutral wire phase three three phase transformer wire
    • Replies: 4
    • Forum: UK Electrical Forum
  12. 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.
  13. 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...
  14. 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...
  15. 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...
    • DMBLLB
    • Thread
    • boiler phase split split phase supply
    • Replies: 2
    • Forum: DIY Electrical Advice
  16. 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
  17. 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 =...
    • bbudding
    • Thread
    • 3 phase calculation phase voltage voltage drop
    • Replies: 5
    • Forum: UK Electrical Forum
  18. 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...
  19. 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
  20. 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?

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