Hi, I've just ordered an Evenheat LB18 and am getting ready for it's arrival. It's a 240 volt oven with a 6 20 plug. The specs say its 13 amps. Right now I have a 30 amp 240 volt receptacle in the shop. Should I reduce this to a 20 amp breaker. I can't seem to find what the continuous ampere load of this oven is but I'm thinking it could be more than 13 amps when it really gets heating. Can anyone help with this?