Locking Connector Amps 20 NEMA Configuration L21-20R Number of Poles 4 Number of Wires 5 Voltage 120/208VAC 3 Phase HP 2 Color Black/White Industrial Grade Material of Construction Impact Modified Nylon NEMA Rating WD-6 Cord Size 0.56 to 0.77 In. Standards UL Fed Spec WC-596/UL498/CSA C22.2 No 42/NOM/NEMA/ANSI