RE:#1-Siemens ECSBPK03 Generator Standby Power Mechanical Interlock

Ensures the main breaker within a panel is forced to the off position when standby power is on
For use on Siemens or Murray panels that are 150, 200, or 225 amp, ultimate or rock solid type
Standby power breaker must be a QP or MP double pole breaker
Adds an extra level of safety
No modification of panel required; Breakers not included