Md. Code, Local Gov't § 13-910

(a) This section applies to all counties except: (1) Anne Arundel County; (2) Baltimore City; (3) Baltimore County; (4) Cecil County; (5) Charles County; (6) Howard County; (7) Prince George’s County; (8) Queen Anne’s County; and (9) Worcester County. (b) The provisions of §§ 9–105 and 9–106 of this article apply to an act, an ordinance, or a resolution adopted by a commission county under this section. (c) An electrical code adopted under this section does not apply to: (1) electrical equipment or electrical appliances or devices used by public utilities in furnishing their services; or (2) work performed by public utilities or their affiliated companies. (d) (1) The governing body of a county may: (i) adopt an electrical code; (ii) provide for inspections to enforce the code; and (iii) impose permit and inspection fees. (2) An electrical code adopted by the County Commissioners of Calvert County shall be adopted by ordinance.