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Individual EVC's wired over 3-phases

Rich Mc

Hello all

Please could anyone advise of any issues for installing single phase EVC's from a 3 phase supply.

Proposing there are 6 x 7kW chargers that are located adjacent to each other and wired from individual phases of a 3-phase supply in a local feeder pillar.

Each single phase charger circuit is protected separately in accordance with 722.533.101. The query is if there are any comments on the adjacencies of the vehicles given they are wired on separate phases?  

Thanks in advance

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    Good question, doing an internet search brought up the National Grid website, they have taken over from Western Power Distribution as our local DNO.

    System voltage

    Low voltage connections (up to 1000V)

    The following standard voltages apply: 

    • Single phase connections; 230V (phase-neutral)
    • Two and three phase connections; 230V (phase-neutral) and 400V (phase-phase)
    • Split phase connections; 230V (phase-neutral) and 460V (phase-phase)

    The voltage should remain within +10% and –6% of these figures.

    connections.nationalgrid.co.uk/.../

    So it does seem we are back to it being 230 volts to earth on all systems, but with some possibly unexpected voltage between lines.

Reply
  • 0

      

    Good question, doing an internet search brought up the National Grid website, they have taken over from Western Power Distribution as our local DNO.

    System voltage

    Low voltage connections (up to 1000V)

    The following standard voltages apply: 

    • Single phase connections; 230V (phase-neutral)
    • Two and three phase connections; 230V (phase-neutral) and 400V (phase-phase)
    • Split phase connections; 230V (phase-neutral) and 460V (phase-phase)

    The voltage should remain within +10% and –6% of these figures.

    connections.nationalgrid.co.uk/.../

    So it does seem we are back to it being 230 volts to earth on all systems, but with some possibly unexpected voltage between lines.

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