(E) Single Non-motor-Operated Appliance. If the branch circuit supplies a single non-motor-operated appliance, the rating of overcurrent protection shall comply with the following:
- Not exceed that marked on the appliance.
- Not exceed 20 amperes if the overcurrent protection rating is not marked and the appliance is rated 13.3 amperes or less; or
- Not exceed 150 percent of the appliance rated current if the overcurrent protection rating is not marked and the appliance is rated over 13.3 amperes. Where 150 percent of the appliance rating does not correspond to a standard overcurrent device ampere rating, the next higher standard rating shall be permitted.
4500 watts = 18.75 amps
18.75 X 1.25 = 23.44
18.75 X 1.5 + 28.125
28.125 = maximum over current device would be 30 amp fuse or breaker