JoeS wrote:Up until now, on 120vac all the EVSEs we've been dealing with have themselves only allowed a maximum current draw of 12A, which, at 80%, is the maximum allowable steady-state current draw from a conventional 120vac 15A (NEMA 5-15) circuit.
For this reason, we have not been concerned with higher currents on 120vac.
This Duosida EVSE evidently is pre-set to allow 16A (irrespective of whether it's 120vac or 240vac) and requires a 20A source circuit.
Does anyone know what is the maximum current draw by the i-MiEV on 120vac if the input current is unrestricted by the EVSE ?
Note: we do know that the maximum current draw by the i-MiEV charger on 240vac is around 13A.
Connected to 120V, through my EMW Wattbox with EKM OmniMeter II, my Duosida EVSE charging my i-MiEV indicated either 14.0 or 14.2 Amps.
I measured the blade thickness of Leviton 5-15P and 5-20P add-on plug adapters, and they are the same, so the 5-20P just has a rotated blade, no other difference.
The receptacle wiring being 14g or thinner wiring is the only reason for 20% derating. A 5-15P could pull 14 Amps all day with 12g wiring, the 20% derate limit is 16 Amps.