3 ms·
Anyone that understands the NEC knows you can bypass the proposed code change entirely by using a cord and plug connected EV charger and pulling a permit for a
by quickthrowman 1y ago
Anyone that understands the NEC knows you can bypass the proposed code change entirely by using a cord and plug connected EV charger and pulling a permit for a 240V 50A ‘welding receptacle’ or ‘RV shore power receptacle’ since cord and plug connected equipment is not subject to the NEC.
You can even convert a hardwired charger into a cord and plug connected charger with a NEMA 14-50P cord end and some #6/3 SO cord, assuming you have access to the line voltage terminal block inside the charger and the instruction manual allows it.
- josephcsible 1y agoBut then you're limited to a lower amperage, since hardwired EVSEs can handle more current than the highest-amperage receptacles, and you need a redundant GFCI breaker even though your EVSE already has GFCI built in.
- quickthrowman 1y agoYour EVSE’s ground fault protection will trip at 20mA of leakage current to protect the equipment, not a person. That is not good enough to qualify as protection to personnel, you need a GFCI breaker that will trip at 5 mA of leakage current. Similarly, electrical switchgear can come with ground fault protection relays that trip at around 30mA of leakage current, which is enough to protect the equipment but not a person. Anyways, a 250V 50A 2P GFCI plug-in breaker is only about $120, that’s the cost of two 15A 1P GFCI/AFCI combo breakers.
- josephcsible 1y ago> That is not good enough to qualify as protection to personnel But it is good enough qualify as protection to personnel if it's hardwired.