Article 422 Appliances. See this article of the NEC and add the following to section 422.19. evaporative cooling units where an evaporative cooler is installed, a listed raceway shall be installed during rough-in from the control point to the evaporative cooler location. The raceway shall contain a wire-type equipment-grounding conductor from the control point outlet box to the junction box at the unit. The equipment grounding conductor shall be sized in accordance with table 250.122
N.M. Admin. Code § 14.10.4.14