Q:Can you fuse H-RF0-K3 to a 10KA SCCR RATING

A:  Yes it is possible. Fusing would have to be applied per your local codes. What we would recommend doing though is returning your H-RF0-K3 and purchasing P-XX-K3RX-K10. Which is a Graceport already rated for 10ka. The only difference is there is no inside outlet.