The LMI-12 Mechanical Interlock enhances electrical safety by preventing two main circuits from operating simultaneously, effectively safeguarding against overload and fire risks. This essential accessory is specifically designed for use with NXB-125 / DZ158-125 circuit breakers to ensure reliable manual switching of dual power supplies. It's a versatile solution ideal for ensuring secure and compliant power management in diverse environments, including residential homes, commercial buildings, hotels, shopping malls, and solar (PV) and energy storage systems.