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Gray thermoplastic single-gang weatherproof cover with self-closing lid and neoprene gasket

Hubbell Incorporated

Hubbell Incorporated HBL3056 Weatherproof Cover 1 Gang Thermoplastic

SKU CH-4XJX-8X0P1

A single-gang weatherproof cover with a self-closing lid and neoprene gasket protects a vertical duplex receptacle to NEMA 3R

  • TypeElectrical Boxes & Covers
  • Watertight protection for duplex receptacles with NEMA 3R rating
  • Self-closing lid maintains seal automatically after use
  • Durable thermoplastic elastomer body resists impact and UV
  • Neoprene gasket provides reliable weatherproof barrier
  • UL and CSA listed for code-compliant installations

Weatherproof Cover for Duplex Receptacles

The Hubbell HBL3056 is a single-gang thermoplastic cover designed for vertical mounting over a duplex receptacle. Its self-closing lid and neoprene gasket create a watertight seal that meets NEMA 3R requirements for outdoor or damp locations. The grey elastomer body resists impact and UV exposure in residential, commercial or light-industrial installations.

Simple Screw-On Installation

The cover mounts directly to a standard device box using the captive screws provided. Align the gasket evenly before tightening to prevent water ingress; an uneven seat is the most common cause of leaks. No special tools are required, but verify that the box depth allows the lid to close fully without binding against the receptacle face.

Check Box Compatibility and Orientation

Confirm the existing box is a single-gang type rated for wet locations and that the mounting holes match the cover pattern. The unit is UL and CSA listed for vertical mounting only; horizontal orientation voids the weatherproof rating. Ensure local code accepts thermoplastic elastomer covers for the intended circuit.

Highlights

  • Watertight protection for duplex receptacles with NEMA 3R rating
  • Self-closing lid maintains seal automatically after use
  • Durable thermoplastic elastomer body resists impact and UV
  • Neoprene gasket provides reliable weatherproof barrier
  • UL and CSA listed for code-compliant installations

Specifications

BrandHUBBELL WIRING DEVICE-KELLEMS
TypeElectrical Boxes & Covers

Questions about this item

How can I confirm the HBL3056 cover is sealing correctly after installation?

Verify the self-closing lid shuts fully and the neoprene gasket sits flush against the box surface with no visible gaps, ensuring the NEMA 3R watertight rating is met.

What comes with the HBL3056 and what must I purchase separately?

The package includes the gray thermoplastic elastomer cover with attached neoprene gasket; you must supply the 1-gang electrical box, duplex receptacle and mounting hardware.

Which version of the HBL3056 should I choose for a vertical duplex receptacle?

This single model is a 1-gang vertical self-closing cover rated NEMA 3R, UL and CSA listed, sized 3-51/64 in. high by 2-13/64 in. wide for standard duplex devices.

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