Appleton RB-328S Reducing Bushing 1-1/2 to 1 Inch

Product Description

The APPLETON RB-328S is a threaded reducing bushing designed to adapt a 1-1/2 inch conduit opening down to a 1 inch conduit entry. Reducing bushings like this one are standard fittings used to fill the gap when a knockout or enclosure opening is larger than the conduit being terminated. The RB-328S weighs 0.370 pounds and installs directly into a threaded hub or concentric knockout. Electricians use this fitting during panel builds, junction box terminations, and enclosure wiring work where mixed conduit sizes are present on a single enclosure.

The RB-328S is suited for use in commercial and residential electrical installations wherever a 1-1/2 inch threaded opening must accept a 1 inch conduit run. It is a common fitting in panel rooms, pull boxes, and conduit bodies. The compact profile, measuring approximately 5.4 inches by 5.3 inches by 0.35 inches in package dimensions, allows it to fit in tight enclosure knockouts without interfering with adjacent fittings.

Key Features

• Reduces a 1-1/2 inch conduit opening to a 1 inch conduit entry in a single fitting
• Threaded design for secure, vibration-resistant installation into hubs and knockouts
• Compact form factor suitable for use in tight enclosure and panel installations
• Lightweight at 0.370 pounds for easy handling during high-volume panel builds

Compatibility

Designed as an OEM-style replacement reducing bushing for use with 1-1/2 inch to 1 inch threaded conduit terminations in standard electrical enclosures and conduit bodies.

Installation Notes

Installation is performed by licensed electricians in accordance with NEC requirements. De-energize the enclosure and verify the absence of voltage before beginning any conduit fitting work. Thread the bushing fully into the knockout or hub by hand and tighten with an appropriate wrench or conduit fitting tool. Do not over-tighten, as this may damage the threads on the enclosure or bushing.

Technical Specifications

• Inlet Size: 1-1/2 inches
• Outlet Size: 1 inch
• Package Dimensions (L x W x H): 5.4 inches x 5.3 inches x 0.35 inches
• Weight: 0.370 pounds
• UPC: 78312646740

Standard Information

• Brand: APPLETON
• Manufacturer Part Number: RB-328S