NEMA L21-20 3-Phase 120/208V 3PY, 5-Wire Extension Cord Industrial High-Power Locking Extension Cord Works with a 20 Amp L21-20 Outlet, Inlet, Plugs, and Connector 20 Amp, 120/208 Volt 5 Wires 10FT SOOW 12/5 L21-20 120/208 Volt 5 Wires This AC WORKS brand extension cord [L2120PR] is a 20 Amp, 5-Wires industrial high-power locking extension cord. The cable is an SOOW 12/5, 20 Amp copper wire with 600 Volt rubber jacket which stays flexible in cold weather. This cord is popular for use with industrial and high-power equipment. Included with your purchase is a 5-year limited warranty. NEMA L21-20 3-Phase 120/208V 3PY, 5-Wire Extension Cord Industrial High-Power Locking Extension Cord Works with a 20 Amp L21-20 Outlet, Inlet, Plugs, and Connector 20 Amp, 120/208 Volt 5 Wires 5-year Limited Warranty