phases

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  1. J

    pfc on 3 phases

    when prospective fault testing a three phase circuit do you only need to do the short circuit test only on the 3 phases in turn due to result being twice that of the earth short circuit current due to the line voltage being twice the value?
  2. G

    110V vs 230V

    Hi, Had a question today. Why do the yanks use 110V and the UK use 230V? What are the costs and benifits? Which one is better? Any help with this one is appreciated.
  3. S

    What Is New Term For 3 Phase

    Hi, Can anyone help please? I can't remember what wording we use under the 17th Edition for phases. I know we have to use the term line conductor instead of phase conductor. But I am writing something that requires the correct terminology when expressing the 3 phases.
    • steverido
    • Thread
    • 3 phase aus conductor electricians' talk new phase phases
    • Replies: 2
    • Forum: Australia
  4. Mark42

    Distance between socket outlets on different phases

    Hi I can’t find this anywhere: what is the minimum distance between sockets wired to different phases in a large domestic installation? I’m sure in the same room is OK (encouraged even, for load balancing - but never in the same enclosure) but I remember reading somewhere years ago about a...
  5. C

    Circuits on phases

    Hi I was wondering if anyone could explain about circuits on phases, on sites that I work on we r given drawings with lighting circuits and power circuits and I get told we need to keep certain circuits on certain phases but dnt knw why, obv you have exp L1 L2 and L3
    • Cj24
    • Thread
    • aus circuit circuits electricians' talk factor loads neutral phases power
    • Replies: 9
    • Forum: Australia
  6. C

    3 phase meter

    Hi All, just registerd and my first post, so be gentle.. Question Regarding a Secondary 3 phase meter i installed on Friday. On Power up noticed that dial was running backwards. i tried changing 2 phases over and still running backwards, tried swapping other 2 phase over and you guessed it...
  7. F

    3-Phase 415V supply. How many circuits?!?

    Hi! I have recently changed my job and my employer has asked me to survey the existing electrical system. The main incomer is 100A 415V 3-phase and neutral and each phase and neutral is attached to a separate CU. This is how is breaks down:- L1+N= (100A CU) Handdriers in toilets, lighting...
  8. S

    ipf and ka on 3ph boards

    just been reading about measuring pfc on 3ph boards and the niceic book states that you should double the line to neutral/cpc (highest) and record it. Does this mean if the doubled result is higher than 6ka that even single phase mcb's should be rated higher than 6ka? Any thoughts? Thanks Sarge...
  9. P

    Two Voltage/CCurrent Values on Motor

    Motor Tags.doc - File Shared from Box.net - Free Online File Storage Got a few queries about the info on the motor tagsin the pics in the attachment. In the first one in the Voltage box, it has 220 Delta and 380 Star. Does this mean that when the motor is running in delta config, the voltage...
  10. P

    phases

    just want to check about sockets close together on different phases or can you plug things in on different phases?:confused: the problem is that servers have 2 power supplys for backup if the power goes then the ups takes over but i have just installed a 15 kva ups to feed the DB (which i...
  11. D

    Testing 480v system

    Hi there, i was called to a job by a customer to replace a distribution board that had suffered water damage within a farm building. The DB i was presented with was 2 - phase, with a measured 250v per phase and 480v between phases. I have never seen these before and no-one in the...
  12. S

    resistance between phases?

    hi just wondered how high the resistance between phases should be on a 3 phase board?
  13. G

    3 Phase Billing

    Got a query about how a 3 phase domestic supply is charged by the supplier. 3 phases enter the meter (digital), does this work out the actual energy used or does it mesure the highest phase and read accross the other two?? basically its a domestic supply with inballanced loads. The sockets and...
    • Graeme Harrold
    • Thread
    • 3 phase billing canada digital electricians' talk meter phase phases supply
    • Replies: 2
    • Forum: Electrician Talk | All Countries
  14. trix

    fluke 1652 pfc

    Hi chaps, a friend of mine has quite a few Fluke 1652's , I myself always use Megger. My nephew now works for his firm, and uses as I do a 1552. On testing a block of flats he gets readings in excess of 17ka (low eli etc) His boss tells him the meter isn't giving the correct...
  15. H

    3 Phase Power in Computer Data Center

    Hi Everyone, I'm new to this site, but have a rather urgent question. I work as an IT Architect and as such I have a responsibility for our Data Centers. Our Data Center is fed by 3-phase power and it has come to my attention that our racks may be incorrectly wired. We feed two blocks of...
  16. S

    Perodic Wrong Type Fuse?

    Hi i have a perodic inspection with an old 3 phase wylex fuseboard with mcbs to bs3871 type 2 fitted the 3 phases are in rows ie banks of ten red/ yellow/ blue,there are a couple of 3 phase items fitted to board split between rows ie on single phase mcbs! Would this be a code 1? Any ideas,advice...
  17. S

    3ph board

    Hi guys, i was thinking if it will be OK to install 3x 10 way metal consumer units with 4 pole main switch instead 1 x 26 way 3Ph. Im trying to save some customer money, that will be similar to domestic installation, with some spotlights and sockets, smoke detectors, 1ph climate control. Rcd...
  18. B

    lighting on 3 phase

    keep coming across switching probs.where you have large area's of lighting spread across three phases,we used to use barrier sw/boxes apparently we don't need them now just stick a 415v label on the switch.Then you get the problem with multi gang switches with say three metal conduit drops and...
    • benji
    • Thread
    • 3 phase electricians' talk lighting phase phases switch three wires
    • Replies: 3
    • Forum: Talk Electrician Forum
  19. L

    connecting 415v 3 phase motor

    i have replaced a 415v 3 phase motor at work. The old one had 3 terminals in a line, each with one internal wire connected, and one terminal on other side with 3 internal wires connected. The new one has 6 terminals, each with one internal wire connected. It came with 3 bridging links which i...
    • lkpflk
    • Thread
    • 3 phase canada connected connecting delta electricians' talk links motor phase phases
    • Replies: 4
    • Forum: Electrician Talk | All Countries
  20. P

    3 phase power

    how is 3 phase power 415v when each phase is 230/240v? I know its a stupid question but im not a spaks. Ta
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