NEMA L21-20 Locking Extension Cords

L21-20P to L21-20R locking extension power cords, rated for 20A, 125V/250V

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SKU: IBX-4807-XX

  NEMA Locking 3-Phase L21-20 Extension Power Cords

   If you have questions or need a quote, please email us at [email protected]


NEMA L21-20P locking male plug to L21-20R power cords rated for 20A, 125V/250V.  Insert the male plug and then twist to lock in secure power connections for 125V or 250V equipment.  Call 1-800-406-8520 for quantity discounts or custom lengths.

l21-30p extension cord


  • Locking L21-20P to L21-20R extension cord
  • Rated for 20A, 125V, 250V
  • Lengths: 10, 15, 20, 25, 50, 75, 100 feet
  • Locking plug and connector style 
  • 10/5 AWG 5-conductor wire
  • Heavy-duty STO jacket


Male Plug                   L21-20P
Female Connector           L21-20R
Amperage 20A
Voltage 125V/250V
Pins Locking                           
Wire Gauge 10/5 AWG – (8/5 AWG 50′)
Length 10, 15, 20, 25, 50, 75, 100 Foot
Color Black

Technical Notes: Uses industrial grade twist locking plugs and connectors
Heavy-duty STO cord made in America
Built and tested to UL standard 817

Also Known As:  L21-20 Power Cable, L21-20 Extension Cable, L21-20P Twist Lock

 Application Shots

l21-20p power cable

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Or give us a call at  1-800-590-8610

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