Square D EIK40602 Safety Switch Electrical Interlock

Product Description

The SQUARE D EIK40602 is an electrical interlock accessory designed for use with compatible safety switches. It mechanically and electrically prevents two switching devices from being energized simultaneously, reducing the risk of hazardous back-feed conditions in distribution panels and switchgear lineups. The unit measures 4 inches in height, 6.4 inches in width, and 7.2 inches in length, making it suitable for installation in standard enclosure configurations. Electricians and maintenance technicians working on industrial and commercial power distribution systems install this type of accessory during panel upgrades, maintenance tie-in work, or new construction where transfer or isolation switching is required.

The EIK40602 is used in applications where two safety switches must be interlocked to prevent simultaneous closure. Typical scenarios include service entrance configurations, generator transfer arrangements, and maintenance bypass setups in commercial and light industrial facilities. The interlock enforces a mechanical and electrical mutual exclusion between the two associated switching devices, supporting safe isolation and transfer procedures without reliance on operator discipline alone.

Key Features

• Electrical interlock function prevents simultaneous operation of two associated safety switches
• Compact form factor: 4 inches tall, 6.4 inches wide, 7.2 inches long
• Lightweight construction at 0.98 pounds for straightforward field installation
• Package quantity of 1 for single-unit procurement
• Designed as a safety switch accessory for use in power distribution and isolation applications

Compatibility

Designed as an OEM-style electrical interlock accessory for compatible SQUARE D safety switches. Consult the manufacturer documentation to confirm fitment with the specific switch model in the installation.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lockout/tagout the affected circuit and verify the absence of voltage before beginning work. Follow the manufacturer wiring and mounting instructions included with the accessory to ensure proper interlock function. Do not defeat or bypass the interlock mechanism after installation.