I have an electric pottery kiln rated 240v, 11,520va, which comes out to be 48 amps. This kiln can run easily 7 or 8 hours at a time. I realize my branch circuit conductors and OCPD have to be sized 125% of the load. My question is, does a device only have to be rated for the rating of the load, allowing me to have a 50amp cord end plug into a 50amp rated receptacle? If I assume this is an appliance, then I believe 422.33(C) would apply and allow me to do this. Or would I have to "hard wire" this? Any thoughts would be appreciated.