http://www.nfpa.org/assets/files/AboutT ... 10-ROC.pdf
A portable EVSE still has to comply with 625.29. Check the comment on left/bottom of page 454:
If in doubt, the primary purpose must predominate. Ultimately, the primary purpose of the NEC is to make installations safe from fire and shock._______________________________________________________________
12-34 Log #2405 NEC-P12 Final Action: Accept
Submitter: Brian E. Rock, Hubbell Inc.
Comment on Proposal No: 12-64
Recommendation: I support the panel action.
Substantiation: This Comment is provided to aid Panel 12 with regard to the
accuracy of the Panel Statement for P12-84. As one of the co-authors (along
with Tim Croushore, Greg Nieminski, Charlie Claar, Craig Toepfer, etc.) under
EPRI IWC Task Force Chair Dave Brown of the original Article 625, I can
provide insight as to the technical basis for the 18-inch lower height limit that
the Submitter sought to change.
The primary purpose of the National Electrical Code® is to insure
installations safe from the risk of fire and shock. To the extent that other
mandates unrelated to this primary purpose (such as ADA), those were taken
into account, as reflected by 4-foot upper height limit from ADA. Where
those mandates for other purposes leava a “gap” in terms of electrically safe
installations, the primary purpose must predominate.
For the lower limit, however, the use of electric vehicle charging equipment
is highly likely in a mixed environment of electric-powered and gasolinepowered
vehicles. This mixed usage environment includes refueling/recharing
of gasoline- and electric-powered vehicles.
Section 625.28 requires that EVSE installed in Hazardous (Classified)
Locations must comply with Articles 500 through 516, specifically Article 514
for Motor Fuel Dispensing Facilities. Table 514.3(B)(1) establishes an upper
gasoline fume height limit of 18 inches, this was taken by the Task Force to
establish the lower limit for nonhazardous (unclassified) ordinary locations
so that there would be no “gray areas” with regard to this boundary between
potential gasoline fume accumulation and where EVSE could be safely located
in ordinary locations.
Panel Meeting Action: Accept
Number Eligible to Vote: 14
Ballot Results: Affirmative: 14
This shows that there's a living web of interconnectedness in these docs and that other requirements must be considered before making a decision. Sorry to beat on this, but cherry picking the desired sentence might get one into trouble more often than helping...
Another comment from the same doc, same page, right column, bottom. Note the dialog with regards the use of 'per'. Note especially that there is a style manual for the NEC and that “NEC language shall be brief, clear, and emphatic.” Read into an article with caution.