Eaton Cutler-Hammer C321KM30 Mechanical Interlock 322838-753 as well as several third-party

as well as several third-party electronic drivers that support 4-pin M12 electrical connections

Simplified Installation: Features a snap-on clip mechanism that securely grips shaft grooves for a non-slip connection

Industrial-Grade Materials: Stainless steel construction protects against corrosion and fatigue in extreme temperature and high-humidity applications

Common indicators include a furnace that cycles through the startup sequence without the burners lighting

Eaton Cutler-Hammer C321KM30 Mechanical Interlock 322838-753 as well as several third-partyThe Eaton Cutler Hammer C321KM30 Mechanical Interlock is a critical field installable accessory designed for Freedom Series NEMA size 00, 0, 1, and 2 starters and contactors. Engineered for horizontal mounting configurations, this heavy duty mechanical link ensures positive electrical isolation by preventing two opposing contactors from closing simultaneously. This hardware is essential for reversing motor applications and multi source power transfers