This AC WORKS brand protective adapter [S630CB620] is a heavy‑duty 1‑foot pigtail designed to convert a NEMA 6‑30P 30 Amp, 250 Volt commercial HVAC plug to a NEMA 6‑15/20R 20 Amp, 250 Volt T‑blade connector. To address concerns about connecting 20A equipment to a 30A power source, the adapter includes an integrated 20 Amp breaker that limits output to safe operating levels and trips if the load exceeds 20 Amps. Built with an STW 10/3, 600‑Volt anti‑cold‑weather jacket, the adapter stays flexible in extreme temperatures and is ideal for EV charging (with 6‑20‑compatible vehicles), job‑site power, construction, and industrial equipment. This product is backed by a 5‑year limited warranty.