Square D S29329 Circuit Breaker Phase Barrier

Product Description

The SQUARE D S29329 is a phase barrier accessory designed for use with PowerPact circuit breakers. Phase barriers physically separate the line terminals between phases inside a breaker assembly, reducing the risk of phase-to-phase faults caused by accidental contact, tool slips, or debris. This component is a direct-fit replacement accessory installed by licensed electricians during panel assembly, breaker maintenance, or switchboard servicing. At 5 inches in length, 8 inches in height, and 1 inch in width, the S29329 installs without modification to the existing breaker frame.

This phase barrier is suited for commercial and industrial electrical distribution applications where PowerPact breakers are deployed in panelboards, motor control centers, and switchboard assemblies. Installers typically fit this component during initial breaker installation or when replacing worn or damaged barriers during preventive maintenance. It is packaged as a single unit and is intended as a replacement or spare-parts accessory for existing PowerPact installations.

Key Features

• Physical phase separation to reduce phase-to-phase fault risk inside PowerPact breaker assemblies
• Direct-fit replacement accessory requiring no modification to the breaker frame
• Compact form factor: 5 inches long, 8 inches tall, 1 inch wide
• Lightweight construction at 1 pound for easy handling during installation
• Single-unit packaging suitable for targeted replacement or maintenance stocking

Compatibility

Designed for use with SQUARE D PowerPact circuit breakers as stated by the manufacturer.

Installation Notes

Installation of phase barriers should be performed by a qualified, licensed electrician in accordance with NFPA 70 (NEC) requirements. Always de-energize and lock out the circuit breaker assembly before removing or installing any internal accessories. Confirm the barrier seats fully and does not interfere with breaker operation before re-energizing the panel. Do not force the barrier into position, as improper seating can compromise phase isolation.