When you say NEMA outlet, all outlets conform to a National Electrical Manufacturers Association specification. If you mean the NEMA 14-50 (240V/50A) receptacle then yes, you can plug in your Tesla Mobile Connector into a NEMA 14-50 receptacle with the optional Tesla 14-50 power plug adapter ($35 US from the Tesla Store.) You do not need to buy, install a separate EVSE such as the Chargepoint or other brand of equipment. Your Tesla Mobile Connector with the optional NEMA 14-50 power plug is all you would need. One reason not to use your Tesla Mobile Connector is so that others could charge there too, even if they were not Tesla vehicles. Most NEMA 14-50 receptacles are not designed for being plugged, unplugged repeatedly. (This type of receptacle is typically used with a wall oven or a range. How many times per year or even per decade is the typical wall oven or range unplugged? Hardly ever. There are special built NEMA 14-50 receptacles for use in places such as RV parks. Those 14-50 receptacles cost quite a bit more but would last longer when repeatedly plugged and unplugged.
In 2017 the NEC was updated to require a GFCI on a 240V/50A circuit with a receptacle and plug such as the NEMA 14-50. The reasoning is that although the EVSE already has GFCI capability this does not detect ground faults at the power plug end, only at the J1772 charging cable end of the EVSE. A GFCI circuit breaker will help prevent the user from being electrocuted while plugging/unplugging the power plug. My electrician, who installed my NEMA 14-50 receptacle prior to 2017, did not think the GFCI was necessary in my NEMA 14-50 installation, inside my garage, when I asked him about it. It is however, now part of the code. Why not for a oven or a range; because you hardly ever plug and unplug those appliances. Also, the NEMA 14-50 receptacle can be installed outdoors (with a covered enclosure). I recall reading that outdoor use of the NEMA 14-50 was only approved for temporary use such as when powering a parked RV motorhome while the NEC considers an EVSE to be a permanent installation. It would makes sense that the GFCI would be required on NEMA 14-50 receptacles installed outdoors; there may have been cases of people getting shocked while plugging and unplugging 14-50 power plugs connected to RVs. Perhaps someone has better, more up to date information.
It has nothing to do with how often an appliance is plugged/unplugged. NEC requires GFCI protection for outlets installed in 'wet' locations and specifically lists garages as a required locations.
Thank you for the clarification. Does the requirement for GFCI protection for outlets in wet locations apply to all types of electrical outlets, for new construction and new circuit installation?
I believe it does. The relevant section of the NEC is 210.8. Specifically it says,
I'm not arguing against NEC requirements but there's more water in my kitchen and laundry room than in my garage and my dryer and range are not on GFCI circuits.
I can't speak to the rationale of the NEC but my understanding is they are included in the newer revisions.
