Thomas Betts 3138 Fmc Conduit Connector 1-1/4 in Malleable Iron

Product Description

The THOMAS BETTS 3138 is a malleable iron conduit connector designed for use with flexible metal conduit (FMC). It features an angled body with a set screw connection method and an insulated throat to protect wire insulation during pull-through. The 1-1/4 inch trade size fits standard FMC of that diameter. This type of connector is used to terminate flexible conduit runs at enclosures, junction boxes, and equipment knockouts in non-hazardous locations. Electricians install it where a rigid-to-flex transition requires a secure, low-profile fitting with a positive mechanical grip on the conduit.

The 3138 is suited for commercial and residential electrical installations where FMC must connect to enclosures or panelboards in non-hazardous areas. The angled design helps manage conduit routing in tight spaces or where the conduit approaches a box at an offset angle. It is appropriate for general wiring applications covered under NFPA 70 (NEC) for FMC installations in dry or occasionally damp locations as permitted by code.

Key Features

• 1-1/4 inch trade size fits standard FMC of matching diameter
• Malleable iron construction provides strength and durability at the termination point
• Angled connector body aids conduit routing in confined or offset entry locations
• Set screw connection method delivers a secure mechanical grip on the conduit
• Insulated throat protects conductor insulation from the metal fitting edge
• Rated for non-hazardous area applications

Compatibility

Designed as an OEM-style fitting for use with 1-1/4 inch flexible metal conduit (FMC) terminations in non-hazardous location electrical enclosures and equipment.

Installation Notes

Licensed electricians install this connector in accordance with NEC Article 348 governing flexible metal conduit. Power down and lock out the circuit or equipment before making any conduit terminations at an enclosure. Insert the FMC into the connector body and tighten the set screw securely to maintain the mechanical connection. Verify the knockout size at the enclosure matches the 1-1/4 inch trade size before installation.