All are made by those interested in electricity and electronics. Nowadays it is mostly encountered in the automotive industry and so on.
As a manufacturer and importer of electrical and electronic equipment, it is important to ensure that your products are compatible with other electrical equipment. To ensure compliance, governments have implemented EMC standards.
From battery-powered to high-voltage installations, there are rules for all electrical devices and systems. Everyone has some expectations in their own products with EMC criteria.
Electromagnetic Compatibility (EMC) Directive - 2004 / 108 / EC requires electrical and electronic equipment to generate only a limited amount of RF interference so as not to interfere with other equipment.