Or you could just get a L14-30R installed and buy an adapter from L14-30P to L6-30R like this one Amazon.com: Parkworld 886368 Adapter Cord NEMA 14-30P Male to L6-30R Female, 30A, 250V, 1.5 Feet : Electronics. At least I hope you can do this as that’s what I just got installed because I want to...