scope:

This standard applies to 60 Hz electrical voltage ratings and operating limits as applied to air-conditioning and refrigerating equipment, heat pumps, and electric furnaces.

Exclusions. This standard does not apply to 50 Hz electrical voltage ratings.

Purpose. The purpose of this standard is to establish, for air-conditioning and refrigerating equipment: definitions; voltage rating requirements; equipment performance requirements; and conformance conditions.

Intent. This standard is intended for the guidance of the industry, including manufacturers, engineers, installers, contractors, and users.

Review and Amendment. This standard is subject to review and amendment as technology advances.

The provisions herein are recommendations intended for implementation only through reference by other authoritative documents.