Square D 9421LH8 Circuit Breaker Operating Mechanism Handle

Product Description

The SQUARE D 9421LH8 is a replacement operating mechanism handle designed for use with circuit breaker operating mechanisms in industrial and commercial electrical enclosures. This handle interfaces directly with the operating mechanism to provide manual control over circuit breaker switching, allowing technicians to operate breakers from outside an enclosure without direct contact with live components. The unit measures 8.8 inches in length, 6.7 inches in width, and 4.6 inches in height, and ships as a single-piece replacement accessory weighing 2.55 pounds.

This handle is intended for use in industrial electrical panel and switchgear installations where a SQUARE D 9421LM1 or LX7 Operating Mechanism is already installed. Typical applications include motor control centers, distribution panels, and enclosed circuit breaker assemblies where external operator access is required. Installation is performed by licensed electricians working on industrial or commercial electrical systems.

Key Features

• Designed as a direct replacement handle for SQUARE D 9421LM1 or LX7 Operating Mechanisms
• Enables external manual operation of enclosed circuit breakers
• Single-piece accessory with no field fabrication required
• Compact form factor: 8.8 inches long, 6.7 inches wide, 4.6 inches tall
• Ships individually packaged for single-unit replacement jobs

Compatibility

Designed for use with the SQUARE D 9421LM1 Operating Mechanism or LX7 Operating Mechanism as stated by the manufacturer.

Installation Notes

Installation should be performed by a qualified, licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lock out the circuit before removing or installing the operating mechanism handle. Verify that the handle is fully seated and properly aligned with the operating mechanism before restoring power. Do not force the handle into position, as misalignment can damage the mechanism linkage.