Looking at installing a JuiceBox plug-in (or hardwired). The only difference seems to be two and a ground, or three and a ground (THHN). This wire is stranded from this ebay guy. I think it's all going to go swimmingly. Any one have any pointers on the install? 3/4in EMT conduit, and a NEMA 14-50R plug. A 50amp dual-pole breaker.
https://emotorwerks.zendesk.com/hc/en-us/articles/222694988-JuiceBox-wiring-for-the-40A-and-75A-models
https://solutions.borderstates.com/resource/conduit-fill-table/
http://www.ebay.com/itm/6-GAUGE-THHN-WIRE-STRANDED-4-COLORS-50-FT-EACH-THWN-600V-COPPER-CABLE-AWG-/311265466223?hash=item4878de176f
https://emotorwerks.zendesk.com/hc/en-us/articles/222694988-JuiceBox-wiring-for-the-40A-and-75A-models
https://solutions.borderstates.com/resource/conduit-fill-table/
http://www.ebay.com/itm/6-GAUGE-THHN-WIRE-STRANDED-4-COLORS-50-FT-EACH-THWN-600V-COPPER-CABLE-AWG-/311265466223?hash=item4878de176f