This AC WORKS brand heavy‑duty wiring device features a NEMA L7‑30R 30‑amp 277‑volt locking female connector designed for industrial, commercial, and high‑power residential applications. Built with impact‑resistant, chemical‑resistant, and weather‑resistant construction, it provides a secure and durable connection point for equipment requiring a locking configuration.The connector includes a weather‑tight seal and a strain‑relief structure compatible with SJT, SJO, SOO, STW 12/3, 10/3, or 8/3 cable specifications. Its locking mechanism ensures devices remain securely connected during operation. The unit is cULus E237606 listed and engineered with thick copper terminals for dependable electrical contact.DIY products include a 1‑year limited warranty. Material: Polymer.