Schneider Electric 9999 BC-3 Electrical Interlock Kit

Schneider Electric’s Square D 9999 BC-3 Electrical Interlock Kit is a Class 9999, Type BC-3 interlock assembly sized for 0–1 installations. It provides one normally open (N.O.) contact and one normally closed (N.C.) contact, enabling you to implement a two-point interlock between adjacent devices so that only one can operate at a time. The kit is designed for use with Square D Class 9999 interlock configurations (Types B and C), delivering a defined electrical interface for coordinating two disconnects or control points in industrial panels. The N.O. and N.C. outputs can feed auxiliary circuits or signaling to confirm interlock status. Installation fitment and exact compatibility depend on the specific BC-3 arrangement and enclosure, so consult Schneider Electric’s documentation or a qualified electrical professional to verify the correct pairing for your application. This interlock kit supports safe sequencing in power distribution setups that require Class 9999 BC-3 interlocks, helping prevent accidental or simultaneous operation of connected devices.