Okla. Stat. tit. 19, § 19-863.39: Standards of safety

All electrical wiring, materials, equipment and the methods of

installation thereof in every county, subject to the provisions of

this act, shall be in strict conformity with approved standards for

safety to persons and property. Compliance with the electrical code

as said code exists at the date of the passage of this act, of any

city having a population of from one hundred and eighty thousand

(180,000) to two hundred and forty thousand (240,000) according to

the last Federal Decennial Census or any future Federal Decennial

Census located in any county as defined herein, shall be deemed to

prima facie evidence of compliance with this act.

When the electrical code of any such city, as defined in this

section, contains no specific standards as to the manner of

electrical wiring, materials, equipment and the methods of

installation thereof, compliance with the statutes of this state

pertaining to the installation of electrical materials and equipment

and conformity with the regulations set forth in the current

National Electrical Code, in effect at the date of the passage of

this act, being the standard of the National Board of Fire

Underwriters for electrical wiring and apparatus as recommended by

the National Fire Protection Association and approved by the

American Standards Association, shall be prima facie evidence of

conformity with approved standards for safety to persons and

property and of compliance with this act.