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Yellow industrial watertight locking plug straight body thermoplastic housing three blades screw terminals

Hubbell Incorporated

Hubbell Incorporated HBL28W08 Watertight Locking Plug 30 A 125/250V AC line protection

SKU CH-C667-FZ6E7

Watertight locking plug rated 30 A at 125/250 V AC with screw terminals for cables 0.375–1 in. diameter

  • Product typeWatertight Devices
  • Watertight and chemical-resistant housing protects connections in wet or harsh industrial environments
  • 30 A, 125/250 V AC rating supports heavy-duty single-phase equipment
  • Non-NEMA three-blade locking design prevents accidental disconnection under vibration or load
  • Screw-terminal wire connections accept cables from .375 in to 1 in for flexible installation
  • Impact-resistant thermoplastic elastomer body withstands rough handling on job sites

Watertight Locking Plug for Industrial Use

The Hubbell HBL28W08 is a straight, non-NEMA locking plug rated for 30 A at 125/250V AC. Its thermoplastic elastomer housing provides chemical and impact resistance while maintaining a watertight seal. Designed for industrial environments, it accepts cable diameters from .375 in to 1 in via screw terminals. The yellow housing ensures high visibility on job sites.

Three-Pole Configuration with Screw Terminals

This plug features three poles and three blades in a polarized design for secure single-phase connections. The standard wiring style uses screw terminals that clamp conductors firmly, reducing the risk of loose connections under vibration. Watertight construction prevents moisture ingress that can cause corrosion or short circuits in outdoor or wash-down areas. No additional sealing accessories are required for the rated protection.

Capacity for Heavy-Duty Equipment Loads

Rated at 30 A and 125/250V AC, the device handles large portable generators, welders, and industrial machinery. The 1 in maximum cable diameter accommodates heavy-gauge cords needed for long runs or high inrush currents. It is not suited for applications requiring NEMA-standard pinouts or voltages outside the 125/250V AC range. The single-phase design limits use to compatible distribution systems.

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Price $55.99
Typical for this category: the median of 1,135 items is $54.99.

Specifications

Product
Brand nameHUBBELL
Product typeWatertight Devices

Questions about this item

Will the screw terminals on the 30 A plug need periodic retightening?

The screw terminals are designed for secure connections; inspect and retighten them during routine maintenance to maintain reliable contact.

What is the first limit reached when the plug runs at 30 A continuously?

The 30 A current rating is the primary limit; sustained operation at this level must not exceed the device's rated capacity.

Does the thermoplastic elastomer housing get hot during all-day use at 30 A?

The housing is rated for industrial use at 30 A and 125/250V AC; normal temperature rise is expected within design limits.

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