Bell 5399-0 1-Gang Weatherproof Extension Adapter, Aluminum, Gray

Bell 5399-0 1-Gang Weatherproof Extension Adapter, Aluminum, Gray

The Bell 5399-0 is a 1-Gang Weatherproof Extension Adapter engineered to extend an existing outdoor electrical box while preserving a weathertight enclosure. Built from durable aluminum with a gray finish, this extension adapter features two 1/2 in. threaded outlets and a 1.5 in. depth, giving electricians extra room to add fixtures, receptacles, or conduit connections to an installed box. It is UL Listed and CSA Certified, making it a dependable choice for exterior and wet-location electrical work. The adapter is ideal for contractors who need to add capacity to a weatherproof outlet box without disturbing existing wiring or replacing the entire enclosure.

Key Features

• Threaded Outlets: Two 1/2 in. threaded outlets for connecting conduit, fixtures, or additional devices to the extended box.
• Durable Construction: Aluminum, metallic construction resists corrosion and holds up under continued outdoor exposure.
• 1-Gang Configuration: Sized to mate with and extend a standard 1-gang weatherproof box.
• Extension Depth: 1.5 in. depth adds usable interior space to an existing box without requiring a full box replacement.
• Two-Outlet Design: Two outlets allow simultaneous connection points for wiring devices or conduit runs.
• Gray Finish: Gray color coordinates with common weatherproof box and cover finishes for a clean exterior appearance.
• Listed for Compliance: UL Listed and CSA Certified for use on code-compliant residential and commercial installations.

Certifications & Compliance

• UL Listed
• CSA Certified

Technical Specifications

• Product Type: Weatherproof Boxes & Extensions
• Product Material: Aluminum
• Product Color: Gray
• Product Depth: 1.5 in
• Construction: Metallic
• Box Type: 1-Gang
• Number Of Outlets: 2
• Certified Listed: UL Listed, CSA Certified

Typical Applications

• Extending Existing Weatherproof Boxes
• Outdoor Receptacle and Fixture Installations
• Wet and Damp Location Electrical Work
• Conduit Connections on Exterior Runs
• Commercial and Residential Exterior Wiring
• Renovation Projects Requiring Additional Box Capacity

Why Bell?

Bell weatherproof electrical products are built with corrosion-resistant materials and independently tested to UL and CSA standards, giving installers a dependable way to extend existing boxes without compromising a weathertight enclosure. The aluminum construction and metallic build of the 5399-0 provide the strength and durability professionals expect for exterior and wet-location electrical work, while the two 1/2 in. threaded outlets and 1.5 in. extension depth simplify adding capacity to installed 1-gang weatherproof boxes on code-compliant jobs.