Thomas Betts 149 Conduit Locknut 3-1/2 in Malleable Iron

Product Description

The THOMAS BETTS 149 is a non-insulated conduit locknut designed for securing rigid metal conduit (RMC) and intermediate metal conduit (IMC) to enclosures, junction boxes, and panels. Made from malleable iron, this locknut provides a durable threaded connection for 3-1/2 inch trade size conduit installations. It is intended for use in non-hazardous locations and suits standard commercial and industrial electrical work. Licensed electricians and electrical contractors install this fitting as part of a complete conduit assembly where a mechanically secure, code-compliant connection is required.

The THOMAS BETTS 149 is applied in non-hazardous indoor and outdoor electrical installations where rigid or IMC conduit terminates at an enclosure, panelboard, or electrical box. At 3-1/2 inch trade size, it is well suited to larger commercial and light industrial conduit runs. It is not rated for use in classified hazardous locations. Installation is straightforward and follows standard conduit-fitting practice for threaded connections.

Key Features

• Malleable iron construction provides reliable mechanical strength for conduit terminations
• Threaded connection type for secure engagement with rigid and IMC conduit threads
• 3-1/2 inch trade size accommodates larger conduit runs in commercial and industrial settings
• Non-insulated design for standard non-hazardous location use
• Compatible with both rigid metal conduit (RMC) and intermediate metal conduit (IMC)

Compatibility

Designed for use with 3-1/2 inch trade size rigid metal conduit (RMC) and intermediate metal conduit (IMC) in non-hazardous area applications with threaded conduit connections.

Installation Notes

This fitting is installed by a licensed electrician in accordance with the National Electrical Code (NEC). De-energize all circuits and verify zero voltage before beginning any conduit termination work. Hand-tighten the locknut onto the conduit threads, then seat it firmly against the enclosure knockout using a locknut wrench or screwdriver and hammer to ensure a tight mechanical connection. Do not use in classified hazardous locations.