Finally got these installed today. Charging of 110 was dreadful! Now just waiting for my back order of Leviton http://www.leviton.com/OA_HTML/ProductDetail.jsp?partnumber=EVB40-PST§ion=37741&minisite=10251 I'll have the UMC on the 14-50 and Leviton on the 6-50. This allows me to charge in any car port & be able to get any EV as secondary vehicle... Lol
Opps, I was just looking at the new Leviton 40 amper and it appears to have a very short pigtail. With an above receptacle precision EVSE mounting location it might just fit "like sox on rooster" with your existing ground "down" 6-50?