Electrician's operation certificate, also known as electrician's post certificate, is a certificate that special operators must hold in the installation and maintenance of electrical equipment, and is a certificate registered by the national safety production training. Electrician's operation certificate can be divided into high voltage and low voltage. The operating voltage above 1000 volts is high voltage, and the operating voltage below 1000 volts is low voltage. Now it is issued by the State Administration of Work Safety (formerly under the control of the Ministry of Labor and the Economic and Trade Commission) and under the control of the local work safety supervision and administration bureaus. The special operation certificate needs to be reviewed every 3 years 1 time. Special operations personnel or the employing unit shall apply for reexamination within the validity period, and the local assessment and certification unit shall be responsible for verification. If you don't review within the validity period, it is impossible to review again, and you can only take the exam again.