This section contains a small selection of our Industrial / Commercial Grade NEMA Style products including Male pigtails, Female pigtails and Extensions. NEMA Styles: 5-15 3 125 volt wire 15 amps, 5-20 3 125 volt wire 20 amps, L21-20 20 amp 120/208 volt 3 Phase 5 wire, L14-20 20 amp 125/250 volt 4 wire, L21-30 30 amp 120/208 volt 3 Phase 5 wire