NEMA L14-20 Extension Power Cord - 30 Foot, 20A, 125/250V, 12/4 SJOOW - UL Listed - Iron Box # IBX-4805-30C HEAVY DUTY / MADE IN USA- Featuring an L14-20P Plug to L14-20R Connector. Rated for 20 Amps and 125/250V. All custom built Iron Box Power cords are built in Raleigh NC HIGHEST QUALITY COMPONENTS  Utilizes top-of-the-line Pass and Seymour wiring devices featuring: Industrial-strength, brass alloy plug blades and connector contacts resist heat rise, provide excellent conductivity. Impact- and corrosion-resistant durable nylon 6 shell material. Integral flexible rubber cord grommet conforms to and seals around wire to provide protection from oils, water, and dirt from entering wiring device. EMERGENCY READY  Equipped with superior weather-proofing, you can count on reliable 20 amp power flow, especially in those extreme situations. Compatible with any generator equipped with a L14-30 receptacle. INDOOR AND OUTDOOR  Made for various uses both indoor and outdoor these cords are built on heavy duty 12/4 SJT wire capable of being buried directly in the ground. THE WORLDS LEADING POWER CORD SUPPLIER - Iron Box manufactures UL listed power cords with only the best components and wire.