Since J1772 compliance is based on those testing requirements, you can't really change the design without needing to retest again. Also, since 305 mm equals 12 inches it really is a draw either way...
The point is, the SAE J1772 standard doesn't require the 305mm cord length, only that it be a maximum of 305mm from the receptacle when conducting the radiated immunity test. There is no other language regarding cord length in the SAE standard, only NEC article 625 which states:
Code: Select all
Article 25-17: Cable. The electric vehicle supply equipment cable shall be Type EV, EVJ, EVE, EVJE. EVT, or EVJT flexible cable as specified in Article 400 and Table 400-4. Ampacities shall be as specified in Table 400-5(A) for No. 10 and smaller and Table 400-5(8) for No. 8 and larger. The overall length of the cable shall not exceed 25 ft (7.63m). Other cable types and assemblies listed as being suitable the purpose, including optional hybrid communications, signal, and optical fiber cables, shall be permitted.
Code: Select all
Article 625-22: Personnel Protection System. The electric vehicle supply equipment shall have a listed system of protection against electric shock of personnel. The personnel protection system shall be composed of listed personnel protection devices and constructional features. Where cord- and plug-connected electric vehicle supply equipment is used, the interrupting device of a listed personnel protection system shall be provided and shall be an integral part of the attachment plug or shall be located in the power supply cable not more than 12 in. from the attachment plug.
People are spewing standards, rules, recommendations, etc. I'm just trying to make sure the facts are straight and clear. Also: Where enforcement isn't in play, intent still matters.