This AC WORKS brand female receptacle features a 3-pole, 4-wire grounding system. It is a NEMA L17-30R, 3-Phase, 30 Amp, 600 Volt flush mount locking outlet. This product is installed to fix a receptacle. The receptacle features chemical and impact-resistant housing along with a quick installation process. The FML1730R is UL and C-UL certified.