Appleton Century Crofts RB300-125 Reducing Bushing Conduit

Reducing Bushing for IMC Conduit

The Appleton Century Crofts RB300-125 is a threaded reducing bushing designed for hazardous-location electrical installations. It connects Intermediate Metal Conduit of two different trade sizes using a female-to-male thread transition. The fitting carries ratings for Class I, Division 1 and 2, Groups B, C, D, plus Class II and Class III hazardous areas. It serves electricians and maintenance crews who need to step down conduit runs safely in classified environments.

Iron Body with Multi-Layer Finish

The bushing is constructed from iron and protected by a chromate conversion coating, powder coating and electroplating for corrosion resistance. Its 1 1/4-inch overall length keeps the joint compact inside enclosures or conduit bodies. The hazardous-location rating means the threads are engineered to maintain flame-path integrity when tightened to specification. Weighing 1.35 lb, it handles mechanical stress without adding excessive load to the conduit system.

Steps Down from 3-Inch to 1-1/4-Inch Trade Size

This fitting replaces a straight coupling or oversized hub when a raceway must reduce from 3-inch to 1-1/4-inch trade size. The jump is worth it when the design calls for a smaller branch circuit or equipment connection downstream of a larger feeder run. It is not for installations that require a non-threaded compression or set-screw connection, nor for runs that must stay within a single trade size throughout.