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Black industrial angled plug with three straight blades, white face, screw terminals visible

Hubbell Incorporated

Hubbell Incorporated HBL7977 Straight Blade Plug 10-50P 50 A

SKU CH-9039-ABK8A

An angled straight-blade plug rated 50 A at 125/250 V AC with three screw-terminal blades for industrial use

  • TypeSafety Shroud Twist Lock, Straight
  • ColorBlack/White
  • 50 A rating powers heavy-duty equipment
  • Angled straight-blade design eases tight-space connections
  • 125/250 V AC dual-voltage suits varied circuits
  • Screw terminals accept .625–1.187 in cable range
  • Industrial-grade corrosion-resistant housing rated IP20

Industrial Straight Blade Plug 10-50P

The Hubbell HBL7977 is a 50 amp straight blade plug rated for 125/250V AC single-phase power. It features a non-grounded NEMA 10-50P configuration with three poles and three blades. The angled housing is corrosion resistant and rated IP20 for industrial environments. Screw terminals accept cable diameters from .625 in to 1.187 in.

Suited For High Current Equipment Connections

This plug suits installers wiring ranges, dryers or welders that require a 50 amp 125/250V connection. It is not for circuits requiring a dedicated grounding conductor or a locking blade interface. Buyers needing GFCI protection or an IP rating above IP20 should look at other devices. The 2 hp at 125V and 3 hp at 250V motor ratings cover compatible loads.

NEMA 10-50P Non Grounded Configuration

The defining specification is the NEMA 10-50P configuration which provides three poles without a ground path. This matches legacy 50 amp appliance inlets but does not meet modern grounding codes for new installations. Verify the receptacle matches this exact blade pattern before purchase. The 50 amp 125/250V rating determines the wire gauge and breaker required.

Highlights

  • 50 A rating powers heavy-duty equipment
  • Angled straight-blade design eases tight-space connections
  • 125/250 V AC dual-voltage suits varied circuits
  • Screw terminals accept .625–1.187 in cable range
  • Industrial-grade corrosion-resistant housing rated IP20

Specifications

BrandHubbell Wiring Device-Kellems
ModelHBL7977
TypeSafety Shroud Twist Lock, Straight
ColorBlack/White

Questions about this item

What does the 50 A rating mean when I wire this plug into my equipment?

The 50 A rating is the maximum continuous current the plug can carry at 125/250 V AC; your circuit breaker and wire gauge must also be rated for 50 A.

How does the NEMA 10-50P configuration limit what I can connect?

The 10-50P layout provides three blades for two hots and a neutral at 125/250 V AC single phase, but it has no separate ground pin.

What cable diameters fit the screw terminals on this plug?

The terminals accept cables from 0.625 in up to 1.187 in outer diameter.

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