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Yellow thermoplastic elastomer watertight locking plug with five blades, straight orientation, screw terminals

Hubbell Incorporated

Hubbell Incorporated HBL26W81 Watertight Locking Plug L21-20P 20 A 120/208V AC line protection

SKU CH-ZH6Q-SD9KK

Watertight industrial locking plug rated 20 A 120/208 V AC with NEMA L21-20P configuration for three-phase power connections

  • Product typeWatertight Devices
  • Watertight seal protects connections in wet environments
  • Industrial-grade thermoplastic elastomer housing resists chemicals and impacts
  • NEMA L21-20P locking design ensures secure three-phase connection
  • Screw terminals accept cables from .375 to .875 inch diameter
  • Rated 20 A at 120/208V AC for demanding power applications

Watertight Locking Plug L21-20P

The Hubbell HBL26W81 is a straight-orientation locking plug rated at 20 A and 120/208 V AC three-phase. Its yellow thermoplastic elastomer housing provides chemical and impact resistance with a watertight seal. Five blades and four poles ensure a polarised connection for industrial power distribution. Screw terminals accept cable diameters from .375 in to .875 in.

Industrial Three-Phase Power Connections

This plug suits facilities running 20 A three-phase loads such as motors, welders or temporary generator hook-ups where moisture or chemical exposure is a concern. Installations requiring a different NEMA configuration, higher current rating or single-phase wiring should select an alternative device.

20 A 120/208 V AC Headroom

The device comfortably handles continuous 20 A three-phase loads within its voltage rating. It reaches its limit when current exceeds 20 A or when cable diameter falls outside the .375 in to .875 in range, requiring a larger-conductor or higher-rated plug.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $79.99
Pricier than about 63% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameHUBBELL
Product typeWatertight Devices

Questions about this item

What cable diameter range does the HBL26W81 plug accept for a secure connection?

The plug accepts cables from 0.375 in to 0.875 in diameter, secured by screw terminals inside the thermoplastic elastomer housing.

Will the L21-20P configuration on this plug mate with an existing L21-20R receptacle on my generator panel?

Yes, the 4-pole, 5-blade L21-20P locking interface matches standard L21-20R receptacles for three-phase 120/208V AC service.

How can I confirm the watertight seal is engaged after wiring the plug?

The locking ring clicks into the receptacle groove and the yellow thermoplastic elastomer housing compresses the gasket, giving a visible and tactile seal.

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