Technical devices, including foreign-manufactured, used in hazardous production facilities should be certified to prove their conformity to the industrial safety requirements set by RoK law. The list of technical devices used in hazardous production facilities and subject to certification is elaborated and approved according to the procedure established by the Government of RoK. To obtain a certificate like that, a company applying for the certificate must submit samples of products to be certified,manufacturer details and technical documentation needed to carry laboratory testing. Verification stages - verification carried out at the testing laboratory to verify whether the design and performance of the electrical equipment comply with the applicable requirements with respect to human and environmental safety. A certification body (accredited within the GOST-K system) decides whether to issue a certificate or refuse to issue a certificate on the basis of test reports, expert examination of technical documentation, applicant`s details. All explosion proof electrical equipment is subject to mandatory certification within the GOST-K certification system, because it falls within the category of dangerous equipment. Examples of the explosion proof equipment: power generation equipment,power distribution equipment, power transmission equipment, power measuring equipment, power control equipment, power conversion equipment, power storage and consuming equipment,telecommunications equipment, devices to be used in hazardous areas, etc. Ex-equipment, including Ex-components of the equipment listed in the "Nomenclature of Products (works) and services requiring mandatory certification under the laws of the Russian Federation", is subject to certification.