I have a 10-30 plug in my garage that I share with my dryer. I ordered cable to convert it from 10-30 to 14-30 so I can use my newly purchased 14-30 adapter to charge my car. It does not seem to work properly. I am getting 240V through the two hot sides but the neutral to hot I am only getting 8V. If I unplug the Tesla adapter I get the full 120V from each side. I have attached pictures of what I am on about. My 14-50 adapter I can get 120V on the UMC side of the adapter from each leg to neutral where on the 14-30 I am only getting 8V. Has anyone else used this configuration? 10-30 from wall to a 14-30 plug with the Tesla 14-30 adapter? It should work in theory right? I am wondering if my adapter has a problem.