(A) All work done by or under the supervision of any person, firm, or corporation licensed for the business of electrical wiring hereunder shall conform to the minimum standards of the City Building Code, as amended, as set forth in §§ 151.15 through 151.32, provided that any commercial or industrial building proposed to be constructed shall meet the specifications required in the No. 1 Fire Zone; and further that No. 12 wire shall be used instead of No. 14 wire for all electrical work, and provided further that the complete wiring of any new dwelling shall have a minimum 100 amperes service.
(B) All work done by or under the supervision of any person, firm or corporation licensed for the business of heating and ventilating or registered for plumbing shall conform to the minimum requirements of the City Building Code, provided that all new or replacement water feed lines to buildings shall have a minimum size of three-fourths inside diameter, and that all water service shall have a main shutoff valve.
(C) Heating and ventilating shall be construed to include warm air heating and duct ventilating and air conditioning.
(`81 Code, § 7-6)