GenTran 30 Amp 125-Volt Non-Metallic Generator Power Inlet Box NEMA L5-30 30 Amp 125 volt non-metallic power inlet box for generators up to 3750 watts Durable, glass-filled nylon NEMA 3r-rated enclosure includes 30a 125v male inlet in NEMA configuration l5-30 on bottom High-impact, UV stabilized, glass-filled nylon resin Since generator connection is made on the bottom, these power inlet boxes retain the "rain tight" rating while in use A sloped top and posts on the back allow precipitation to drain off; UL listed