How can you easily make your JuiceBox work on 120V? We sell an adapter that is specifically wired for this, but if you didn't buy ours and bought one from someone else, then your JuiceBox won't work.
If you don't have the time to order one, you can build your own with the following:
1 NEMA 14-50 R
1' of (minimum) #12/2 gauge (plus ground--so 3 total conductors) SJOOW Rubber cord. You can purchase by the foot at most home improvement stores.
With these, you can use this guide for wiring: