This is all I've found so far
evnow wrote:Does anyone kn exctlywhich "code" makes hardwiring mandatory ? Is there such thing as a federal code at all -is it just some states ?
. I think the latest National Electric Code is 2008 - this is from 1999. Article applies to EVSE - I have no idea if there are other articles that apply as well.
I bought a copy of SAE J1772 Jan 2010 and am working thru it. There are a pair of diagrams that detail AC Level 1 and Level 2 charging. Level 1 is identified as a "method of EV/PHEV charging that extends AC power from the most common grounded electrical receptacle to an on-board charger using an appropriate cord set...AC level 1 allows connection to existing electrical receptacles in compliance with the National Electrical Code - Article 625." The diagram clearly indicates use of a NEMA 5-15 or 5-20 plug.
For Level 2 the description reads: "the primary method of EV/PHEV charging that extends AC power from the electric supply to an on-board charger from a dedicated EVSE as shown in Figure 4. The electrical ratings are similar to large household appliances and specified in Table 1. AC Level 2 may be utilized at home, workplace, and public charging facilities." The diagram clearly indicates a hard-wired connection to the grid.
J1772 has a number of other references to SAE, FCC, International Electrotechnical Commission, ISO, NFPA, and UL pubs.
Here's a link
- confirms Gary's comment about the 2011 NEC being 'on the streets'.