Single gang NEMA 3R receptacle cover Compliance with 2008 NEC Article 406.8 (B) (1) Compliance with 1999 NEC Article 410-57(b) and NEC Article 210-60(b) Designed to mount horizontally Patented insert design Brand: Intermatic - Part No.: WP1000C - Depth: 2.25 in. - Housing: Article 406.8(B)(1) Compliant - Mounting: Vertical Only - Use With: Single Gang Applications -