The parkworld brand, #62305A 100 ft. Heavy-Duty 4-Prong Locking NEMA L14-30 Generator/Transfer Switch Power Extension Cord. It has a 4-Prong Locking 30 Amp 125-Volt/250-Volt L14-30P male plug and a L14-30R female connector. This extension cord is UL and cUL Listed, it will let you connect the emergency portable generators to your 30 Amp house transfer switch or power inlet box, which is great for home emergency power system applications. The L14-30R receptacle end on indicator light when power is on.
NEMA L14-30 Generator/Transfer Switch Extension cord
Plug: NEMA L14-30P, 30 Amp, 125-Volt/250-Volt 4-prong locking male plug
Receptacle: NEMA L14-30R, 30 Amp, 125-Volt/250-Volt 4-prong female connector, the L14-30R receptacle end on indicator light when power is on
Cable: UL, c-UL Listed STW 10-gauge 4C wire, 100% copper conductor for heavy-duty performance
Fully molded with nickel-plated brass pins and terminals to prevent oxidation and rust.
Maximum operating power of 30 Amp, 250-Volt, 7,500-Watt