I got the 15-foot L14-30 to SS2-50R extension cord to use with my generator. I personally find SS2-50 connectors to be easier to work with than L14-30 due to the handle. I also think they're a bit safer than L14, because the ground pin in the center makes contact with the target inlet BEFORE any hot blade makes electrical contact. There's really nothing I can do about the socket that's on the GENERATOR, but I can absolutely choose my preferred outlet+plug type for its entry point on my house. The cord is ETL-certified. ETL doesn't have the public relations budget & consumer outreach of UL, but it's accepted by American insurance companies and most (if not all) building code jurisdictions in the US. Basically, UL developed the test standards, ETL applies them, and the end result for consumers is the same. The cord conveniently includes a carrying strap and adapter ring to facilitate more secure attachment to some inlets.