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Splitting up a 3 phase area???

Tomgunn
Hi everyone,


There are some 21 'open' areas and each 'area' doesn't have a door... each 'area', (about 10ft x 10ft x 20), has to have 4 DSO and a cooker supply / outlet. 


The problem is, as there are so many 'open' areas, (without any doors'), the 3 phase has to be 'balanced', (as we know), and each phase would be broken into about 7 areas, ie; 1 phase for 7 'areas / 'units'. That's simple enough BUT, as there aren't any doors' to these 'areas' / units I'm concerned about someone running, (unlikely but possible), a lead from one 'unit' to another thereby one 'area' would then have 415v in it. 


How could you protect this from happening / alternative wiring? There isn't a bus-bar anywhere and really all of the 21 'units' couldn't be put on the same phase. I don't know what the incoming fuse rating is yet. Has anyone done something similar??


I haven't worked out the amount of amps, per unit, yet but, with some 21 cooker outlets and some 80 odd DSO's it just wouldn't be possible to all go on one phase.


Any ideas welcomed!!


Cheers, Tom

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  • 0
    broadgage:

    Agree, no cause for concern, there USED to be a regulation requiring one phase (or  one pole of a DC supply) per room, with a relaxation for large rooms or areas where this was impracticable, that allowed different phases or poles of a DC supply in the same room or area provided that outlets on different poles or phases were at least six feet, later two meters apart.

    Enforcement was patchy for fixed installations and non existent for portable equipment.


    And this regulation was abolished decades ago.


    It was IMHO a sensible regulation decades ago with unearthed metal light switches and brass lamp holders. I would not have fancied 415 or 480 volts between two unearthed metal fittings within easy reach. Not needed these days.


    Hiya, yes, I remember, years' ago, that there was some regs about this... thanks for the reply everyone!!!!


    regards and, good luck to all!! Tom


Reply
  • 0
    broadgage:

    Agree, no cause for concern, there USED to be a regulation requiring one phase (or  one pole of a DC supply) per room, with a relaxation for large rooms or areas where this was impracticable, that allowed different phases or poles of a DC supply in the same room or area provided that outlets on different poles or phases were at least six feet, later two meters apart.

    Enforcement was patchy for fixed installations and non existent for portable equipment.


    And this regulation was abolished decades ago.


    It was IMHO a sensible regulation decades ago with unearthed metal light switches and brass lamp holders. I would not have fancied 415 or 480 volts between two unearthed metal fittings within easy reach. Not needed these days.


    Hiya, yes, I remember, years' ago, that there was some regs about this... thanks for the reply everyone!!!!


    regards and, good luck to all!! Tom


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