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Black and white nylon straight blade plug, industrial 20A 347/600V L23-20P

Hubbell Incorporated

Hubbell Incorporated HBL2531 straight blade plug 20A 347/600V 4-pole 5-wire L23-20P

SKU CH-5YW9-N6M77

Industrial 20 A locking plug rated 347/600 V AC with 4 poles, 5 wires and IP20 nylon housing for three-phase power

  • ColorBlack/White
  • TypeTraffic & Parking Lot
  • Rated for 20 A three-phase loads up to 347/600 V AC
  • L23-20P locking configuration ensures secure connection in industrial environments
  • Nylon housing resists impact and chemicals for long service life
  • Accepts cord diameters from .350 in to 1.150 in for flexible installation
  • IP20 rating provides basic protection against solid objects

Hubbell HBL2531 Industrial Locking Plug

The Hubbell HBL2531 is a straight-blade locking plug rated for 20 amps at 347/600 volts AC. It features a 4-pole, 5-wire L23-20P configuration designed for three-phase industrial power connections. The nylon housing provides durability in demanding electrical environments.

Thermal and Electrical Characteristics

The device carries an IP20 rating for protection against solid objects in normal operation. Its non-shrouded design and nylon construction offer standard industrial-grade insulation for 600-volt service. The plug accommodates cord diameters from .350 in to 1.150 in for secure cable termination.

Sustained Load Behaviour

Under continuous three-phase loading the industrial-grade rating maintains stable contact integrity at the full 20-amp capacity. The locking mechanism prevents accidental disconnection during prolonged operation on 347/600-volt circuits. No antimicrobial or corrosion-resistant coatings are applied to this model.

Highlights

  • Rated for 20 A three-phase loads up to 347/600 V AC
  • L23-20P locking configuration ensures secure connection in industrial environments
  • Nylon housing resists impact and chemicals for long service life
  • Accepts cord diameters from .350 in to 1.150 in for flexible installation
  • IP20 rating provides basic protection against solid objects

Specifications

BrandHubbell Wiring Device-Kellems
ColorBlack/White
TypeTraffic & Parking Lot

Questions about this item

How do I install the HBL2531 plug on a cable, and what step is often done wrong?

Strip each conductor to the device's recommended length, seat all five wires into the correct 4-pole terminals, then tighten the cord grip evenly so the 0.350 in to 1.150 in cable range is centred — the step most often missed is fully torquing every terminal screw before snugging the grip.

What maintenance or replacement will the HBL2531 need over time?

Inspect the nylon housing and brass contacts periodically for heat discoloration, cracked insulation or corrosion; replace the plug if any terminal shows pitting, the cord grip no longer clamps the 0.350 in to 1.150 in cable securely, or the L23-20P blade geometry is worn.

What limit appears first when the HBL2531 runs at 20 A on a 347/600 V three-phase circuit?

The 20 A, 347/600 V AC rating is the thermal ceiling — sustained load at that level will bring terminal temperature to its design limit before any other factor, so the circuit must not exceed 20 A per pole.

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