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Black and white locking plug with ribbed nylon housing

Hubbell Incorporated

Hubbell Incorporated HBL4770C Locking Plug L7-15P 15 A 277V AC video accessory

SKU CH-HWF3-CF46H

A 15 A 277 V AC locking plug with moulded face, roomy wiring chamber and impact-resistant ribbed nylon housing

  • Product typeLocking Devices
  • Product colorBlack/White
  • Individually molded face ensures precise blade fit
  • Roomy wiring chamber simplifies cable installation
  • Ribbed nylon housing resists impact and chemicals
  • Locking L7-15P design secures 277V AC connection
  • Rated 15 A for reliable power delivery

Hubbell HBL4770C Locking Plug

The Hubbell HBL4770C is a 15 A, 277V AC locking plug designed for secure power connections in demanding environments. It suits electricians and facility managers who need a reliable NEMA L7-15P device for equipment requiring a locking interface.

Individually Molded Face and Roomy Chamber

Each blade configuration receives an individually molded face for precise fit. The roomy wiring chamber provides ample space for conductors, easing termination work. A ribbed nylon housing delivers a secure grip that resists impact and chemical exposure.

Straightforward Field Wiring

The plug installs by inserting stripped conductors into the spacious chamber and tightening terminal screws. The ribbed housing aids grip during assembly. The main risk is loose terminal screws or incorrect blade alignment, which can cause overheating or connection failure.

How it compares

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

Price $18.99
Cheaper than about 73% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameHubbell Wiring Device-Kellems
Model nameHBL4770C
Product typeLocking Devices
Product colorBlack/White

Questions about this item

Will the ribbed nylon housing on the HBL4770C need replacement from impact or chemical exposure?

The ribbed nylon housing is impact and chemical resistant, so it is designed to withstand normal use without requiring replacement for those reasons.

What is the continuous current limit before the 15 A locking plug overheats?

The plug is rated for 15 A at 277 V AC; sustained loads at or below that rating are within its design limits.

Does the HBL4770C generate noticeable heat or noise when powering equipment all day?

As a passive locking plug with no moving parts or electronics, it produces no audible noise and only minimal heat from normal current flow.

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