This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Waveform/wavecon cable sizing

Just had a quote in from Western Power for a new 100a 3 phase supply. There is approximately 100m between the pole mounted transformer and the cut out and the DNO has specified 185mm wavecon cable.. this seems like an overkill to me, the pole transformer is 50Kva and it seems like 95mm would be more appropriate!  Not sure what voltage drop on waveform cable is like but compared with regular SWA 95mm still seems plenty big enough.. Thoughts on this would be appreciated! Thanks




Parents
  • Former Community Member
    0 Former Community Member
    I understand WPD policy is to only use:


    35 mm2 single core

    35 mm2 three core

    95 mm2 three core

    185 mm2 three core

    300 mm2 three core


    All aluminium cores with copper wave-con outer.


    The 95 mm2 is only used for a service cable where there is NO possibility of a second cut-out required, say for a granny flat, second house on the plot etc. 


    185 mm2 is used if there is or likely to be a second service or there is a second service.


    I'd wonder why the client has not shown you the entire quote.......... but that's me having been "burned" many times!


    As an aside, I think there could be some fun with my most recent application on behalf of a client. I CAT and genny'd the site to locate the existing service to adjacent industrial plot and as client had heard rumours of "free electricity", I got him to expose the cable and it is WPD, not SWA. Submitted application and WPD returned plan seeking confirmation that we'd do digging, of which I expected a short run. Hmm, their plan doesn't show this cable, only the main outside the site. Of course the plans could be wrong but again rumour has it that the connection was made by an employee at the weekend a long time ago............................


    Regards


    BOD
Reply
  • Former Community Member
    0 Former Community Member
    I understand WPD policy is to only use:


    35 mm2 single core

    35 mm2 three core

    95 mm2 three core

    185 mm2 three core

    300 mm2 three core


    All aluminium cores with copper wave-con outer.


    The 95 mm2 is only used for a service cable where there is NO possibility of a second cut-out required, say for a granny flat, second house on the plot etc. 


    185 mm2 is used if there is or likely to be a second service or there is a second service.


    I'd wonder why the client has not shown you the entire quote.......... but that's me having been "burned" many times!


    As an aside, I think there could be some fun with my most recent application on behalf of a client. I CAT and genny'd the site to locate the existing service to adjacent industrial plot and as client had heard rumours of "free electricity", I got him to expose the cable and it is WPD, not SWA. Submitted application and WPD returned plan seeking confirmation that we'd do digging, of which I expected a short run. Hmm, their plan doesn't show this cable, only the main outside the site. Of course the plans could be wrong but again rumour has it that the connection was made by an employee at the weekend a long time ago............................


    Regards


    BOD
Children
No Data