Andersen Twenty foot Extension Cord for the Power Supply.
This will plug into the existing cord on back of power operator and connects to the Power Supply

Length: 20'
Cable Shape: Round

Related Parts:
1521902 - 10 foot extension cord
1521908 - 20 foot extension cord
1522004 - Power Supply
1522006 - Command Center
1521916 - Extension Cord for Command Center, 10ft. 
1521922 - Extension Cord for Command Center, 20ft.