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> Please pay an electrician unless you have a copy of the NEC and understand it. The problem with this change is specifically that even people who do understan
by josephcsible 1y ago
> Please pay an electrician unless you have a copy of the NEC and understand it.
The problem with this change is specifically that even people who do understand the NEC won't be able to work on their own homes anymore.
- quickthrowman 1y agoAnyone 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.