KC certification is a product certification mark in South Korea.
According to the "Korea Electrical Products Safety Management Law," since January 1, 2009, electrical products safety certification is divided into compulsory certification and self-discipline (voluntary) certification of two kinds.
Compulsory certification means that all electronic products belonging to compulsory products must be certified by KC Mark before they can be sold on the Korean market.
Self-discipline (voluntary) certification refers to: all electronic products belonging to voluntary products only need to be tested and certificated, and do not need to be subject to factory review. The certificate is valid for 5 years.

KC certification factory examines the first instance requirements:

The South Korean Safety Act provides for the first factory review of the factory after the application is authorized. According to the requirements of the safety law, a preliminary evaluation of the quality control system in the factory involves the following aspects:
The factory shall produce certified products in accordance with the product certification implementation regulations and plant quality assurance capability requirements consistent with the certified samples certified by the certification authority. According to the relevant laws of Korea Safety Certification and the relevant provisions of Korea Industrial and Technical Test Institute (KTL), your factory should have the following documented procedures or regulations, which should be in line with factory quality management and product quality control:
1) Product change control procedures (e.g. after the declaration of certified product change has been approved by the certification authority, the Department shall formulate corresponding technical documents in strict accordance with the approved changes and issue them to the relevant departments to correctly implement the changes of the certified product. Certification marks can not be applied to the changed products without approved changes. )
2) document and data control procedures
3) Quality Record Control Procedure {Including Record Preservation Period for at least 3 years (Purchase only, Routine and Operational Inspection Records)}
4) routine inspection and validation procedures.
5) nonconforming product control procedure
6) inspection and verification procedures for critical components and materials.
7) internal quality audit procedures
8) Procedures such as inspection standards for process instructions, operating procedures for instrumentation and equipment, and management systems shall be maintained by the factory to include at least the following quality records to confirm that the factory has carried out all production inspections and production tests, and that the quality records shall be authentic and valid
9) Routine inspection and confirmation inspection records of products; purchase inspection/verification records of key components and materials and certification of conformity provided by suppliers
(1) records of regular calibration or verification of inspection and test equipment;
(2) routine inspection and confirmation (operation) inspection record;
(3) daily check record of safety equipment on production line (workshop);
(4) disposal records of unqualified goods (purchase, routine and operation);
(5) internal audit records;
(6) record of corrective actions taken by customer complaints.
The correct records of the unqualified inspection run;

Annual Factory review requirements:

After the certificate is authorized, the certification authority conducts an annual follow-up review of the plant. The main purpose is to see whether the plant's quality control system is consistent with safety law standards.
The annual Factory review is divided into two parts.
1) The inspection of quality documents, quality records and relevant contents of the manufacturing site is basically the same as the initial inspection.
2) need to confirm the consistency of all products authorized by KC Mark. Verify the key components, material, circuit, structure of the certified product according to the attached page of the certificate (list of key components).
Sampling requirements:
There are 216 products listed in the compulsory certification of KC Mark up to now. The Korean Safety Law stipulates that all products are sampled annually, so each product is sampled once a year.
The sampling method is;
Factory inspectors conduct annual inspections. When there is production or inventory on site, the inspectors seal the samples and the samples are sent to the designated address within three months.
In the absence of production or inventory at the time of inspection, the factory shall send the specified sample to the designated address within six months.