This interlock kits fits Siemens 100 A panels as shown with a left-ON, Right-OFF main breaker and 3/4" to 7/8" spacing from the bottom edge of the main breaker panel knockout to the top edge of the generator breaker panel knockout.
 
The generator breaker must occupy the top left breaker stack position.
 
The kits include everything you need to complete the installation including a correct size high quality drill bit, name brand thread locking compound, all warning labels and placards, a breaker retention strap, and clear illustrated installation instructions.
 
Once you use an interlock kit from GenSafety you won't want to use anything else. "We make you look good!"
 
All of our kits are proudly made in the USA!
 
Interlock kits are in stock and normally ship the same day.