• Subpart A [§ 431.1 - § 431.4] - Subpart A—General Provisions

• Subpart B [§ 431.11 - § 431.36] - Subpart B—Electric Motors

• Subpart C [§ 431.61 - § 431.66] - Subpart C—Commercial Refrigerators, Freezers and Refrigerator-Freezers

• Subpart D [§ 431.71 - § 431.77] - Subpart D—Commercial Warm Air Furnaces

• Subpart E [§ 431.81 - § 431.87] - Subpart E—Commercial Packaged Boilers

• Subpart F [§ 431.91 - § 431.97] - Subpart F—Commercial Air Conditioners and Heat Pumps

• Subpart G [§ 431.101 - § 431.110] - Subpart G—Commercial Water Heaters, Hot Water Supply Boilers and Unfired Hot Water Storage Tanks

• Subpart H [§ 431.131 - § 431.136] - Subpart H—Automatic Commercial Ice Makers

• Subpart I [§ 431.151 - § 431.156] - Subpart I—Commercial Clothes Washers

• Subpart J [§ 431.171 - § 431.176] - Subpart J—Fans and Blowers

• Subpart K [§ 431.191 - § 431.196] - Subpart K—Distribution Transformers

• Subpart L [§ 431.201 - § 431.206] - Subpart L—Illuminated Exit Signs

• Subpart M [§ 431.221 - § 431.226] - Subpart M—Traffic Signal Modules and Pedestrian Modules

• Subpart N [§ 431.241 - § 431.246] - Subpart N—Unit Heaters

• Subpart O [§ 431.261 - § 431.266] - Subpart O—Commercial Prerinse Spray Valves

• Subpart P [§ 431.281 - § 431.286] - Subpart P—Mercury Vapor Lamp Ballasts

• Subpart Q [§ 431.291 - § 431.296] - Subpart Q—Refrigerated Bottled or Canned Beverage Vending Machines

• Subpart R [§ 431.301 - § 431.306] - Subpart R—Walk-in Coolers and Walk-in Freezers

• Subpart S [§ 431.321 - § 431.326] - Subpart S—Metal Halide Lamp Ballasts and Fixtures

• Subpart T [§ 431.341 - § 431.346] - Subpart T—Compressors

• Subpart U [§ 431.381 - § 431.387] - Subpart U—Enforcement for Electric Motors

• Subpart V [§ 431.401 - § 431.408] - Subpart V—General Provisions

• Subpart W [§ 431.421 - § 431.430] - Subpart W—Petitions To Exempt State Regulation From Preemption; Petitions To Withdraw Exemption of State Regulation

• Subpart X [§ 431.441 - § 431.448] - Subpart X—Small Electric Motors

• Subpart Y [§ 431.461 - § 431.466] - Subpart Y—Pumps

• Subpart Z [§ 431.481 - § 431.485] -