Review on 🔒 Secure Your Circuit Interruptions with Siemens QF260A Circuit Interrupter Lockout by David Stover

Requires a 60a shutdown when upgrading an old 50a spa. This switch required some serious cable compression to fit the external switch I already had for my old 50a switch next to the tub I was replacing. (I used to use 70 amp wire to combat the voltage drop, so don't worry, the switch in my panel was 60 amp too). It worked, but be aware that it's a much larger physical size than a 50 amp circuit breaker.