The NEC section 4-6.8(B)(1) require that all 15 and 20 amp 125 and 250 volt outdoor receptacles in wet locations have a cover that is weatherproof even when a plug is inserted into the receptacle. While-In-Use Weatherproof Cover has a patented corner hinge and cord opening to allow vertical or horizontal installations. The exclusive WaterShed™ channel keep water moving outside while the cord flap keeps the inside dry.FEATURES AND BENEFITS:• RoHS Compliant• Comply with NEC 2014 Section 406.9 (B)(1) for wet location covers, and conforms to NEMA 3R.• Listed and identified as “Extra Duty”.• Covers are self closing as required by UL514C42.3.• Covers mount vertically and horizontally.• Body, cover, and plates are made of robust polycarbonate for added durability.• Mounting screws made of 302 stainless steel for corrosion resistance.• Single receptacle plate available in 1.405 inch and 1.595 inch openings.• Deep model available for 20A locking plugs.• Shallow covers accommodate up to 14/3 AWG extension cords.• New trigger latch opens easily with one finger.