This AC WORKS brand adapter cord S515L1430-018 is very durable. It is a NEMA 5-15P to NEMA L14-30R. The NEMA 5-15P is a 15-Amp, 125 Volt, 3-prong household male plug. The NEMA L14-30R hots bridged is a 30 Amp, 125/250 Volt, 4-prong locking female connector. The maximum operating power is 1875 Watts. It works with a generator power cord or a transfer switch inlet box. This adapter is 1 foot in length and is an STW, 10/3, anti-cold weather cable staying flexible in extreme temperatures.