Square D 9421LHP8 Circuit Breaker Operating Mechanism Handle

Product Description

The SQUARE D 9421LHP8 is a replacement operating mechanism handle designed for use with circuit breaker operating mechanisms in industrial and commercial electrical enclosures. This handle attaches to the 9421LW7 operating mechanism and provides the external actuation point for opening and closing the circuit breaker without direct contact with internal components. Measuring 8.8 inches in length, 6.8 inches in width, and 4.5 inches in height, it is sized to integrate directly with the corresponding mechanism assembly. Licensed electricians and industrial maintenance technicians are the primary installers of this component.

This handle is suited for panel and enclosure applications where an external operating mechanism is required to actuate a circuit breaker through a door or panel surface. It is specified for use with the SQUARE D 9421LW7 operating mechanism, making it appropriate for replacement and maintenance work on existing installations that already incorporate that mechanism. Typical installations are found in commercial and industrial facilities where safety interlocks and door-operated breaker actuation are required by code or facility standards.

Key Features

• Designed as a direct replacement handle for the 9421LW7 operating mechanism assembly
• External actuation allows breaker operation without opening the enclosure door
• Package quantity of one handle per unit for straightforward single-unit replacement
• Dimensions of 8.8 x 6.8 x 4.5 inches provide a defined fit envelope for enclosure planning

Compatibility

Designed for use with the SQUARE D 9421LW7 operating mechanism. Confirm mechanism model and enclosure configuration before installation.

Installation Notes

Installation should be performed by a qualified electrician in accordance with NFPA 70 (NEC) requirements. De-energize and lock out the circuit before accessing any breaker or operating mechanism components. Verify that the handle model matches the specific operating mechanism installed in the enclosure before assembly. Do not force the handle into position; consult the mechanism documentation to confirm correct alignment and mounting procedure.