The NEMA L14-30P is a 30 Amp, 125/250 Volt, 4-prong male plug.
It is a NEMA L14-30P to NEMA 6-30R. L14-30P 4-Prong 30A Generator Plug to 6-30R 3-Prong 30 Amp 250 Volt HVAC Female Adapter This AC WORKS brand adapter L1430630-018 is very durable with a flexible design.The product is heavy-duty STW 10/3 30 Amp copper wire with a 600 Volt Jacket. The NEMA 6-30R is a 30 Amp, 250 Volt, 3-prong HVAC female connector.