The provisions of the mechanical code shall not apply to:
A. Work located in a public street;
B. Heating, ventilation, comfort cooling, refrigeration systems, incinerators or other heating or cooling appliances within trailer coaches, campers, mobile homes, motor vehicles and airplanes; however, if any of the foregoing are permanently placed on the ground or have their wheels removed for other than temporary repairs, they shall comply with all the provisions of this code;
C. Heating, ventilating, comfort cooling, refrigeration systems, incinerators or other heating or cooling appliances within houseboats or other watercraft: however, if any of the foregoing are stored out of water and used for any purpose whatsoever, they shall comply with all the provisions of this code.
(Ord. 8-25 § 8 (Exh. G))