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?
5 kW, for reasons I don't entirely understand, seems to be common for lamppost charging.
To allow I suspect the use of 2.5mm cable and cutouts that take a 20 or 25A fuse but might not be quite so happy with 32A.
However modern housing developments are more likely to have a minimum underground cable cross-section of 6mm2 or higher, but of course this supplies a number of fittings in a loop-through sort of way and is dominated by voltage drop, not thermal current rating.
Mike
Typical specs for non chargepoint streetlights can make quite informative reading
UKPN guidance suggests that a maximum of 5 and a bit KW may be available from some streetlamps for charging cars without supply upgrade, and perhaps more surprising without pre-notification. - As per the 'powerpoint slide below from
https://www.ukpowernetworks.co.uk/-/media/files/electric-vehicle-charging/ev-scenarios-may-2020.ashx
Note that UKPN do allow some diversity for chargers on their LV networks, - see section
7.5.1 Case 1a and Case 1b Diversity Factors.. in the more formal PDF
