Low Voltage Residential Generators Standby Power (Generators) - Generators Accessories are Residential Enclosures Standby Power (Generators). Sub BrandStandby Power Systems Type Manual Transfer Interlock Kit Application For use onload centers or meter combinations that will accept a QNR/MD-TR frame circuit breaker next to a 2-pole circuit breaker Standard UL/NEMA 1/3R Amperage Rating 225A Mounting Flush or Surface Length 1 Width 3 Height 3