garygid wrote:Many "newer" documents, guidelines, etc. were apparently prepared from older standards, and, these various documents appear to be mostly "educational", even "guiding", but not the actual constraining "standards".
I don't know if I buy this. The standards are ultimately what the states or counties have on their books. It's pretty clear that the requirement that was in effect when the DOE studies were done, when the J1772 spec was updated, when ETEC...etc.
In government-document speak, the NEC is the law and defines the widest bounds unless further restricted by a state, county, city, or smaller jurisdiction. If the NEC allows something, a state can still remove it or further tighten it. If the NEC says a breaker can be 100A, then a state says it must be 90A, and a city says 80A, none of them become 'educational' - they all apply - but the end user is bound by the most restrictive requirement if they're in that jurisdiction.
garygid wrote:The fact still remains that the 2008 NEC standards appear to allow sufficiently-featured 32-amp Level 2 to be plugin. But, states (like CA) are often behind on "adopting" new NEC versions, and CA frequently "changes" a few things in the adoption.
Based on the past revisions of the NEC, the clarification that there's a culture of "it's assumed unless specifically written" in the NEC and in state codes, and the interpretation of the folks that got paid big bucks to put the code requirements into 'general public speak' (like the eTec papers referenced earlier), I cannot agree with this. The RULE in the NEC is that EVSE=Hardwired unless specifically stated (as they do in many paragraphs with the cord-on-plug...125V...etc. wording).
garygid wrote:Of course, after that, the local laws and building codes & practices may vary.
Finally, what gets final-inspection "approval" will often vary even from one inspector to another.
But, I think that we currently can have hope that a plug-in Level 2 EVSE is at least a possibility.
Who knows how or if we could build, sell, or use a 40, 50, or 80-amp Level 2 EVSE!
I have no idea how it would work or if it would work, but with the change in the NEC and the specific approval of the NFPA vote, some devices appear to be allowed to have plugs. Seems one can either wait for it to trickle down to their county, or print the page and sell the plan to their inspector.
Or say 'screw it' and let them install the EVSE, wave good-by, yank the thing off the wall, and attach a plug.
You do really good work finding things, but I am a bit (OK, a lot) lazy. Thanks for your continued support and dedication, Gary
I knew there had to be logical progression and/or evolution. Cherry picking government docs is really not recommended. One really has to dig thru, find the trail, then follow it backward and forward before they can start to understand.