N.C. Gen. Stat. § 62-43: Fixing standards, classifications, etc.; testing service.

(a) The Commission may, after notice and hearing, had upon its own motion or upon complaint, ascertain and fix just and reasonable standards, classifications, regulations, practices, or service to be furnished, imposed, observed or followed by any or all public utilities; ascertain and fix adequate and reasonable standards for the measurement of quantity, quality, pressure, initial voltage or other condition pertaining to the supply of the product, commodity or service furnished or rendered by any and all public utilities; prescribe reasonable regulations for the examination and testing of such product, commodity or service and for the measurement thereof; establish or approve reasonable rules, regulations, specifications and standards to secure the accuracy of all meters and appliances for measurement; and provide for the examination and testing of any and all appliances used for the measurement of any product, commodity or service of any public utility.

(b) The Commission shall fix, establish and promulgate standards of quality and safety for gas furnished by a public utility and prescribe rules and regulations for the enforcement of and obedience to the same. (1919, c. 32; C.S., s. 1055; 1933, c. 134, s. 8; c. 307, s. 11; 1941, c. 97; 1963, c. 1165, s. 1.)