Reliance Controls PC3020 PC3020K Generator Power Cord, No Size, Black The Reliance Controls 20-foot 30 Amp power cord is designed for use with Reliance manual transfer switches, transfer panels, and power inlet boxes. This heavy-duty power cord features 10-gauge, 4-wire, NEMA L14-30 plug and connector ends. It is UL listed and covered by a 5-year warranty.