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Black and white industrial locking plug with twist-lock body and cord grip

Hubbell Incorporated

Hubbell Incorporated HBL2441 Locking Plug L18-20P 20A 120/208V AC video accessory

SKU CH-3GRM-9QNA8

A 20 A, 120/208 V AC three-phase locking plug with NEMA L18-20P configuration, cord grip, and clear funnel wire entry for industrial use

  • Product typeLocking Devices
  • Product colorBlack/White
  • Secure three-phase power with 20 A 120/208 V AC locking plug
  • Prevents accidental disconnects through NEMA L18-20P twist-lock design
  • Reduces termination strain via integrated cord grip for 0.350–1.150 in cables
  • Simplifies wiring with clear funnel-shaped entry accepting 16–8 AWG stranded copper
  • Withstands harsh environments from −40 °C to +75 °C with nylon housing

Industrial Locking Plug L18-20P

The Hubbell HBL2441 is a 20 A, 120/208 V AC locking plug built for industrial three-phase circuits. Its NEMA L18-20P configuration provides a secure twist-lock connection that resists accidental disconnection. The nylon housing withstands chemicals and impact across an operating range of -40 °C to +75 °C. It accepts cable diameters from .350" to 1.150" and wire sizes from 16 AWG to 8 AWG stranded copper.

Suits three-phase equipment needing a secure

This plug serves installers wiring portable cords for 20 A three-phase loads where a locking interface is specified. The integral dust shield helps keep contaminants out of the wiring chamber during installation and service. It is not suited for single-phase applications, non-locking receptacles, or circuits rated above 20 A. Buyers needing a different NEMA configuration or a higher amperage rating should look at other devices.

Deciding spec: NEMA L18-20P three-phase 20 A rating

The NEMA L18-20P designation confirms a 4-pole, 4-wire locking arrangement rated for 20 A at 120/208 V AC three-phase. This single classification determines whether the plug matches the receptacle and circuit in your facility. Verify the service voltage, phase configuration, and amperage before purchase. The plug carries UL 498 and CSA C22.2 No. 42 certification for code-compliant installations.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $34.99
Cheaper than about 56% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameHubbell Wiring Device-Kellems
Model nameHBL2441
Product typeLocking Devices
Product colorBlack/White

Questions about this item

How can I confirm the HBL2441 plug is wired correctly after installation?

Verify the screw terminals show polarized orientation and that the cord grip holds the cable firmly; the clear funnel-shaped wire entry lets you visually confirm each conductor is fully seated before tightening.

What comes with the HBL2441 locking plug and what must I supply?

The plug body with integral dust shield and cord grip is included; you must provide portable cord within the .350 to 1.150 diameter range and #16 to #8 AWG stranded copper wire for the screw terminals.

Which NEMA configuration should I choose for a 20 A three-phase circuit?

Select the L18-20P version; it is rated for 20 A at 120/208V AC three-phase and matches the 4-pole, 4-wire requirement for that service.

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