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Black and white nylon locking plug with brass blades and cord grip

Hubbell Incorporated

Hubbell Incorporated HBL2331 Locking Plug L7-20P 20 A 277V AC video accessory

SKU CH-2SZB-KNK31

A 20 A 277 V AC locking plug with L7-20P configuration, screw terminals, cord grip and IP20 rating for industrial use

  • TypeNew
  • ColorBlack/White
  • Reliable power delivery with 20 A 277V AC rating
  • Secure lock prevents accidental disconnects with NEMA L7-20P design
  • Flexible installation accepts cable diameters from .360" to .930
  • Durable nylon housing resists chemicals and impacts per UL 498
  • Wide operating range from -40°C to +75°C continuous use

Industrial Locking Plug L7-20P

The Hubbell HBL2331 is a NEMA L7-20P locking plug rated for 20 A at 277 V AC single-phase. It uses a two-pole, three-wire layout with screw terminals and a straight orientation. The device is built for indoor dry locations with an IP20 rating and an operating range of -40 °C to +75 °C.

Cord Grip and Dust Shield

A built-in cord grip accepts cable diameters from .360" to .930" and reduces strain on the terminations. The included dust shield limits contaminants entering the wiring chamber during installation and service. These features address mechanical stress and debris without adding separate components.

Nylon Housing With Brass Blades

The housing is moulded from nylon and the blades are brass, materials specified for chemical and impact resistance per the manufacturer. The plug accommodates stranded copper conductors from #16 AWG to #8 AWG. Certifications include CSA C22.2 No.42, UL 498 listing and Federal Specification W-C-.

Highlights

  • Reliable power delivery with 20 A 277V AC rating
  • Secure lock prevents accidental disconnects with NEMA L7-20P design
  • Flexible installation accepts cable diameters from .360" to .930
  • Durable nylon housing resists chemicals and impacts per UL 498
  • Wide operating range from -40°C to +75°C continuous use

Specifications

BrandHubbell Wiring Device-Kellems
ModelHBL2331
TypeNew
ColorBlack/White

Questions about this item

How often will the screw terminals on the HBL2331 need retightening under vibration?

The plug uses screw terminal wire connections with a cord grip that reduces strain on terminations, and the nylon housing with brass blades is constructed for resistance to impacts per manufacturer specifications.

What is the maximum continuous operating temperature before the L7-20P materials degrade?

The operating temperature range is rated from -40°C minimum to +75°C maximum continuous use without impact.

How much heat does the plug generate when running at 20 A 277V AC all day?

The plug is rated for 20 A and 277V AC single-phase operation with an operating temperature maximum of +75°C continuous use, and materials are certified to CSA C22.2 No.42 and UL 498.

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