(f) Electric Heating Appliances Employing Resistance-Type Heating Elements Rated More Than 48 Amperes.
(1) Electric Heating Appliances. Electric heating appliances employing resistance-type heating elements rated more than 48 amperes, other than household appliances with surface heating
elements covered by 4.22.2.2(b), and commercial-type heating appliances covered by 4.22.2.2(d), shall have the heating elements subdivided. Each subdivided load shall not exceed 48 amperes and
shall be protected at not more than 60 amperes.
These supplementary overcurrent protective devices shall be (1) factory-installed within or on the heater enclosure or provided as a separate assembly by the heater manufacturer; (2) accessible; and (3) suitable for branch-circuit protection.
The main conductors supplying these overcurrent protective devices shall be considered branch-circuit conductors.
(2) Commercial Kitchen and Cooking Appliances. Commercial kitchen and cooking appliances using sheathed-type heating elements not covered in 4.22.2.2(d) shall be permitted to be subdivided into circuits not exceeding 120 amperes and protected at not more than 150 amperes where one of the following is met: