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EV Charging and Lamp Posts

richard64

We have a job wiring lamp post lighting in a private car park.

Somebody has decided that an EV point will be fitted at each lamp post and will supply the light.

When you apply the 3% volt drop for the luminaire, obviously the cable size increases substantially.

Any thoughts?

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    Both the lights and the chargers should be fine with a 5% voltage drop. But a lesser voltage drop would be better from the energy saving point of view.

    Remember that the often quoted 3% "limit" on voltage drop for lighting is in fact a suggested or "deemed to comply" figure for domestic and similar applications when the type of light to be used is unknown and/or liable to be changed.

    The actual regulatory requirement is that the voltage drop should "not prevent the proper functioning of the connected equipment"

    But I say again, consider the energy cost of voltage drop.

    The installation does sound rather inadequate, but as the O/P says it is not his design. The landlords 200 amp 3 phase supply sounds ample for more or faster chargers if desired. Do of course double check what the existing loads are.

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  • 0

    Both the lights and the chargers should be fine with a 5% voltage drop. But a lesser voltage drop would be better from the energy saving point of view.

    Remember that the often quoted 3% "limit" on voltage drop for lighting is in fact a suggested or "deemed to comply" figure for domestic and similar applications when the type of light to be used is unknown and/or liable to be changed.

    The actual regulatory requirement is that the voltage drop should "not prevent the proper functioning of the connected equipment"

    But I say again, consider the energy cost of voltage drop.

    The installation does sound rather inadequate, but as the O/P says it is not his design. The landlords 200 amp 3 phase supply sounds ample for more or faster chargers if desired. Do of course double check what the existing loads are.

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