I bought a heavy 15-foot extension cord to connect my Model 3 (via a Gen 2 mobile connector with a NEMA 10-30R adapter) to my in-laws' old NEMA 10-30R basement dryer plug. It works fine to recharge my car. Here's my question: If I get an adapter like this one (http://www.shorturl.at/ruT39), am I risking electrical disaster using the 30-amp extension cord with my 50-amp home NEMA 14-50 outlet? Trying to avoid burning down the house or damaging my new Model 3!