Westinghouse Square D QO 150-225 Amp Load Center Generator Interlock Kit

Safely switch your home from utility power to generator power with the Westinghouse WLock QO Generator Interlock Kit, made for compatible "G" and "S" Series NEMA 1 indoor and "G" and "S1" Series NEMA 3R outdoor QO load centers. The kit interlocks a QO2 two-pole 150-225A main circuit breaker with a QO two-pole 15-125A branch circuit breaker for the generator connection. Unlike a manual transfer switch that limits power to pre-selected circuits, the WLock QO lets you manage your breaker panel to choose which circuits to power based on your generator's available capacity. It also prevents the utility main breaker and generator breaker from being switched ON at the same time, helping protect against dangerous backfeed. Compatible with most generator brands using 30A or 50A connections, it's a cost-saving alternative to a separate transfer switch and eliminates the hassle of running extension cords through your home. The corrosion-resistant metal interlock kit includes an interlock bracket, retaining bracket, drill template, mounting hardware, 3/16 in. and 1/16 in. drill bits, thread sealant and manual. Verify your panel series, breaker configuration and the required 1-3/8 in. spacing between the bottom of the main breaker and the first breaker on the right before ordering. Professional installation is recommended for code compliance. Not affiliated with Schneider Electric.