[Huey52]

Max load can only be 80% of circuit rating. If you are using a 14-50 plug rather than hardwiring the charger, the plug is only rated at 50A thus a max load of 40A.

.... hence why ChargePoint, and most others, cite hardwire-only to achieve 48A throughput.

 

[Nai3t]

Re: receptacles vs. hardwire, this all goes back to the NEC as the source. I'll put the applicable sections in quotes because it's a long list, so click to expand. The very last one is the one that matters most.

625.44(A) Portable Equipment.
Portable equipment shall be connected to the premises wiring system by one or more of the following methods:

(1) A nonlocking, 2-pole, 3-wire grounding-type receptacle outlet rated at 125 volts, single phase, 15 or 20 amperes

(2) A nonlocking, 2-pole, 3-wire grounding-type receptacle outlet rated at 250 volts, single phase, 15 or 20 amperes

(3) A nonlocking, 2-pole, 3-wire or 3-pole, 4-wire grounding-type receptacle outlet rated at 250 volts, single phase, 30 or 50 amperes

(4) A nonlocking, 2-pole, 3-wire grounding-type receptacle outlet rated at 60 volts dc maximum, 15 or 20 amperes

625.44(B) Fastened-in-Place Equipment.
Equipment that is fastened in place shall be connected to the premises wiring system by one of the following methods:

(1) A nonlocking, 2-pole, 3-wire grounding-type receptacle outlet rated 125 volts or 250 volts, single phase, up to 50 amperes

(2) A nonlocking, 3-pole, 4-wire grounding-type receptacle outlet rated 250 volts, three phase, up to 50 amperes

(3) A nonlocking, 3-pole, 4-wire grounding-type receptacle outlet rated 250 volts, single phase, 30 or 50 amperes

(4) A nonlocking, 2-pole, 3-wire grounding-type receptacle outlet rated 60 volts dc maximum, 15 or 20 amperes

625.44(C) Fixed Equipment.
All other EVSE and WPTE shall be permanently wired and fixed in place to the supporting surface

 

[Dougie01]

I set mine to 32A because for overnight charging that’s plenty.

 

[AZ EV Driver]

Re: receptacles vs. hardwire, this all goes back to the NEC as the source. I'll put the applicable sections in quotes because it's a long list, so click to expand. The very last one is the one that matters most.

As far as the ChargePoint Home Flex EVSE goes it can fit into each of the sections. In my mind if it has a plug it should be Portable (625.44(A)), if it is hung with one screw in the upper "keyhole slot" it is Fastened-in-Place (625.44(B)), and if the second screw in added it is Fixed (625.44(C)). I originally purchased mine for the portability aspect, but have since seen it as a Fixed unit (although it is easily unmounted to take with should I see fit - just not "grab and go"). Having a plug also allows me to easily change to another EVSE manufacturer without getting an electrician involved in the event that the CP unit become unusable.