3phase | Page 3

3phase

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  1. S

    3phase or single phase motor.

    hey guys, ok basically a friend bought a 2nd hand thickness planer and asked me to do him a favour and wire it for him.i havnt much experience at this. first off i cant tell if the motor is single or 3phase, it has 400v and 220v written on the plate on the side of the motor. there is a...
  2. sythai

    3phase help please....

    Hi there... Bit out of practice with 3phase design, and want to learn more. Just want to check if this would be correct: Ib = KW/V*1.732 Many thanks, Sy
  3. C

    3phase

    At any point on a 3phase motor and its supply should u get continuity across any of the phases at any point, just to settle an argument cheers
  4. T

    3Phase MCBS

    i now no the answer
  5. D

    3phase wiring help!

    Hi all, I am sorry to bother you all with what will seem a silly point for most of the qualified people but I am in need of urgent help without going back to my sparky as we have had a falling out. Basicly we recently had my shop re-wired which included a new 3phase supply. I had alll my range...
  6. B

    3phase supply

    Hi there, heres hoping i can borrow some of your time to corroborate an nic inspector's advice. The job is to move a 3p+n supply 30m to an adjoining building through a duct in the ground. The customer needs over 70A per phase for his equipment. So coming from the existing kiosk with 3phase...
  7. W

    Dead Testing - 3Phase Motor and S-Plan

    When testing Insulation Resistance or Continutiy on a 3phase Motor, do you need to disconnect the cables from the motor? Or do you just test I.R to the starter, then I.R from starter to motor? (as the starter will be open when dead) Would a motor come under "equipment vulnerable to testing"...
  8. sythai

    Maximum Demand... 3phase

    Looking at job this week, involving fair bit of additional 3phase equipment... Just wondering how to go about calculating maximum demand + diversity for this ? Any Ideas please?
  9. P

    3phase transformer no neutral?

    Just a quick question lads been disconnecting all the temporary power as the site coming to an end and when I was disconnecting the 3 phase 110v transformers there wasn't a neutral present. Just 3 phases and an earth. Was curious why this was as I thought it would definatly need a neutral as...
  10. P

    3phase

    I have to wire up an autoclave its 3 ph 415 v 9kw and doing ohms law I get 21.6 amps the question is do I devide this by 3 or would it be 21.6 a per phase
  11. S

    3phase industrial - clear a couple of things up?

    Hey guys, first post here so please go easy :) Iv just started this job, helping a mate of mine, whose mate has brought a unit that needs fitting out. Il try and paint a picture for you... Its the middle of 3 units, that was knocked into 1, but now been bricked back up into 3...
  12. J

    3phase machine goes BANG with a bit of smoke

    hello every one just wondering if u could give me possible solutions to why it went bang. its a 3 phase machine pluged in to a socket. the socket goes straight back to board. the machine is a compressor and is very old bout 30ish years!!! i did NOT wire the sockets or the board. they...
  13. E

    3phase

    Can anyone tell me how best to protect a sub mtr that will require a 3 phase and N ? Is a 3 pole breaker the best option ? I only need 6amp protection for the power to the mtr. Whats the best price for the kit etc ?
  14. M

    Help wiring a 3phase motor

    Hi Guys Can anyone give me some "off the record" help to temporarily wire in a piece of industrial equipment with a 7hp 3 phase motor? I am taking delivery of a secondhand rubber rolling mill into my storage barn to later resell it, I want to check it runs ok first:) The barn has a new 3phase...
  15. C

    Changing 3Phase Motors

    I maintain conveyor systems and we are always changing out motors, and I have been wondering if before we put ' back into service ' we should be taking some test readings and recording them . I have asked our managers and they reckon that because we are not adding to or changing the circuit that...
  16. S

    3phase and Neutral

    Hi Guys, I am fairly new on here, I am just studying my first ear on the 2330 Electrical course and i have tonne of stuff to ask you all which doesn't seem to make sense to me yet. Well here goes with the first thing regarding (3 load phase and the neutral wire). I think i understand...
  17. K

    balancing 3phase domestic

    I find myself in the position of having to balance a 3phase domestic installation. The supply comes into a large main house, with 16mm 3c swa to garage (incorporating 8kw sauna, snooker room with heating) and 25mm 3c swa to Pool House (incorporating kitchen, water boiler, water heater etc)...

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