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Hubbellock locking plug with tough nylon housing, molded male contacts, 20/30 A

Hubbellock

Hubbellock HBL21415B Locking Plug 20/30 A line protection

SKU CH-EBH4-VQ3NZ

A 20/30 A locking plug with moulded-in contacts, nylon housing and an arc-protection shutter for heavy-duty use

  • TypeLocking Devices
  • Superior arc protection from spring-loaded safety shutter
  • High impact resistance with super tough nylon housing
  • Damage-resistant male contacts molded into the nose
  • Unrivaled strain relief via power mechanical cord grips
  • Longer lasting device from thermoplastic interior heat resistance

Hubbellock 20/30 A Locking Plug

The Hubbellock HBL21415B is a non-NEMA locking plug rated for 20 A and 30 A circuits. It is designed for heavy-duty electrical connections in demanding environments where secure power delivery is essential. The device suits industrial and generator applications requiring a robust, locking interface. It is not intended for standard residential outlets or low-amperage domestic appliances.

High-amperage capacity with industrial headroom

The plug handles continuous loads at 20 A and 30 A ratings, providing reliable line protection for generators and heavy equipment. Its construction supports sustained current draw without overheating in typical industrial settings. The device reaches its limit when connected to circuits exceeding the 30 A rating or non-locking receptacles. Users needing higher amperage or different pin configurations must select an alternative device.

Super-tough nylon housing with arc safety shutter

A super-tough nylon housing delivers high impact resistance for harsh job-site conditions. Molded-in male contacts resist damage and eliminate pin deformity during insertion and removal. The connector interior includes a spring-loaded safety shutter for arc protection at the termination points. Integrated mechanical cord grips secure the cable and clamp conductors for superior strain relief during daily use.

Highlights

  • Superior arc protection from spring-loaded safety shutter
  • High impact resistance with super tough nylon housing
  • Damage-resistant male contacts molded into the nose
  • Unrivaled strain relief via power mechanical cord grips
  • Longer lasting device from thermoplastic interior heat resistance

Specifications

BrandHUBBELL
TypeLocking Devices

Questions about this item

Will the HBL21415B 20/30 A locking plug mate with older Hubbellock receptacles on my existing generator?

Yes, the HBL21415B is a Hubbellock series non-NEMA locking plug rated 20/30 A, so it fits matching Hubbellock receptacles of the same rating.

How can I confirm the plug is making a proper connection after wiring it?

The spring-loaded safety shutter inside the mating connector provides arc protection and only opens when the plug is fully seated, giving tactile and visual confirmation.

Does the HBL21415B come with a cord or cable clamp, or must I supply my own cable?

The plug includes built-in mechanical cord grips that secure the cable and clamp the conductors for strain relief; you supply the cable.

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