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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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    I would stick with more or less standard single phase 7 kw chargers. and agree to avoid anything odd like 5 kw. And yes do double check that the available supply if sufficient. Large numbers of EV chargers may need a new substation, but a handful can SOMETIMES be added to the existing supply. 9 EV chargers each of 7 kw will be just under 100 amps per phase, presuming that a three phase supply is available. larger numbers are possible if the chargers contain some form of smart control that limits the total load.

    If acceptable to the client, it might be more economic to install the chargers in groups of three at every third lamp post. One three phase cable, to three single phase chargers. Then a small single phase cable to those posts without chargers. 

    What is the available supply ? And how many chargers are proposed ?

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  • 0

    I would stick with more or less standard single phase 7 kw chargers. and agree to avoid anything odd like 5 kw. And yes do double check that the available supply if sufficient. Large numbers of EV chargers may need a new substation, but a handful can SOMETIMES be added to the existing supply. 9 EV chargers each of 7 kw will be just under 100 amps per phase, presuming that a three phase supply is available. larger numbers are possible if the chargers contain some form of smart control that limits the total load.

    If acceptable to the client, it might be more economic to install the chargers in groups of three at every third lamp post. One three phase cable, to three single phase chargers. Then a small single phase cable to those posts without chargers. 

    What is the available supply ? And how many chargers are proposed ?

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