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Black nylon locking plug L7-15P with screw terminals and cord grip

Hubbell Incorporated

Hubbell HBL4773VBK Locking Plug L7-15P 15A 277V AC video accessory

SKU CH-V426-NRY2H

A 15 A, 277 V AC locking plug with nylon housing, screw terminals and a 0.220–0.660 in cord range for industrial use

  • Product typeLocking Devices
  • Overall length2.9
  • Product colorBlack
  • Product weight0.15
  • Reliable 15 A 277 V AC power delivery with NEMA L7-15P locking configuration
  • Secure cord grip handles 0.220–0.660 in cables reducing strain on screw terminals
  • Nylon housing withstands impact and chemical exposure meeting UL 498 and CSA C22.2 No. 42
  • Operates from -40 °C to +75 °C with 2,000 V dielectric strength for industrial durability
  • Compact 2.900 in black plug rated IP20 for indoor dry locations

Industrial Locking Plug L7-15P

The Hubbell HBL4773VBK is a 15 A, 277 V AC locking plug built for industrial power connections. Its NEMA L7-15P configuration provides a secure 2-pole, 3-wire grounded connection that resists accidental disconnection in demanding environments. The nylon housing meets impact and chemical resistance requirements for harsh settings.

Sustained Load Performance

Rated for continuous operation at 15 A with a maximum horsepower rating of 2 hp, the plug handles steady industrial loads without overheating. Dielectric strength is tested to a minimum of 2,000 V, and the operating temperature range spans -40 °C to +75 °C without impact. Screw terminals with hinged wiring style maintain reliable contact under vibration and thermal cycling.

Upgrade From Non-Locking Connectors

This plug replaces standard straight-blade connectors where vibration or movement could cause power loss. The locking mechanism and cord grip range of 0.220 to 0.660 inches secure conductors from #18 to #12 AWG stranded copper. The jump is worth it when equipment uptime depends on a connection that will not pull loose.

How it compares

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

Price $11.99
Cheaper than about 83% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameHubbell Wiring Device-Kellems
Model nameHBL4773VBK
Product typeLocking Devices
Product colorBlack

Questions about this item

How much heat does the 15 A 277V AC locking plug generate when it runs continuously?

The nylon housing is rated for continuous operation from -40°C to +75°C without impact, and the dielectric strength is at least 2,000V, so normal load stays within those thermal limits.

What cable and wire must I already have to wire this L7-15P plug?

You need a portable cord with an outer diameter between 0.220 and 0.660 inches and stranded copper conductors from #18 AWG to #12 AWG for the screw terminals.

Will this 2-pole 3-wire grounded plug work with my existing 277V single-phase equipment?

Yes, the NEMA L7-15P configuration matches 15 A 277V AC single-phase circuits and is UL 498 listed and CSA C22.2 No. 42 certified for that service.

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