A Harmonized Standard, or HS, is a European standard applied predominately to manufacturing activities across multiple industries including appliance, chemical, construction, cosmetics, electric, and toys, to name a few. Development of harmonized standards come from recognized European Standards Organizations; European Committee for Standardization (CEN), European Committee for Electrotechnical Standardization (CENELEC), or European Telecommunications Standards Institute (ETSI). Harmonized standards are used to validate that products comply with relevant EU legislation and are published in the Official Journal of the European Union (OJEU).
Although participation is voluntary, manufacturers that apply the harmonized standard can simplify the path to market for their products in myriad countries that recognized these harmonized standard.
The harmonized (H or HAR) cable standard was created by a coalition of European countries in accordance with accepted standards held by the CENELEC. (https://www.cenelec.eu/)
While all harmonized cables are international cables, not all international cables are harmonized. The distinction can be made by looking at the markings on the cord jacket. In fact, it is the listed order on the jacket that defines the harmonized cable standard. This unique and very specific nomenclature is used to quickly identify materials sourced in manufacturing a power cord.
Whether a jacket carries the H or HAR marking depends on where the cable was manufactured. Only manufacturing carried out in one of the CENELEC member nations may apply the HAR designation.