XMK Generator Interlock Kit for Square D QO & Homeline Panels – 100–125 A

Power your home safely during outages with the XMK Generator Interlock Kit

When you rely on a portable generator during outages, it's essential that power flows are controlled and safe. The XMK Generator Interlock Kit offers a professional-grade solution that fits Square D QO and Homeline panels rated at 100 and 125 amps, with a precise 3/4 to 7/8 inch spacing between the main and branch breaker spaces. This kit is designed for indoor or outdoor installations, giving you flexibility depending on your setup.

Compatibility and spacing

The interlock works with Square D QO or Homeline panels in 100 A and 125 A configurations. A single-handle horizontal throw moves between positions, maintaining a safe gap of 3/4 to 7/8 inches between main and branch breakers.

Easy, reliable installation

Designed for straightforward mounting, the kit ensures the main breaker can never be on while the generator breaker is active. It moves smoothly during operation and provides a clear, auditable path for safe power sharing between utility and generator.

• Connects to Square D QO or Homeline panels with compatible configurations
• Safer backfeed control without the complexity of a transfer switch
• Compact, professional-grade hardware designed for periodic use

What’s included

• 1 x Interlocking Plate
• 3 x Shoulder Screws
• 3 x Hex Nuts
• 1 x Matching Drill Bit
• 1 x Generator Start-Up Procedure Labels
• 5 x Remind Labels
• 2 x Zip Ties
• 1 x Instruction

Installation tips and safety

Follow local electrical codes and consult a licensed electrician if unsure about wiring or panel compatibility. Inspect hardware before each use and store labels for quick reference during outages.

Note: This interlock kit is designed to facilitate safe operation with a portable generator; it does not replace a code-compliant transfer switch where required by code.