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    Application Procedure for Ex Electrical Equipment Installation & Maintenance Qualification

    SINO Testing Services

    | 2026-03-06|Return

    Qualification for Installation, Overhaul and Maintenance of Explosion-proof Electrical Equipment (mainly the Certificate of Competence for Installation, Overhaul and Maintenance of Explosion-proof Electrical Equipment) is a mandatory document for enterprises to legally carry out relevant operations. The requirements and procedures for application are as follows:

    I. Core Application Requirements

    The enterprise shall arrange at least 3 technical personnel to participate in professional training and pass the assessment, and obtain the Personal Qualification Certificate for Explosion-proof Electrical Operation.

    The training and assessment are conducted in accordance with the GB/T 3836-2021 series standards (General Requirements for Equipment Used in Explosive Atmospheres).

    Validity period: The certificate is valid for 3 years.

    II. Complete Application Procedure

    Consultation and Preparation: Consult Shenzhen ZOYO Testing Technology Co., Ltd. to confirm the application conditions, and prepare materials including business license, personnel information and application documents.

    Personnel Training and Assessment: Arrange employees to take a 1–2 day online special training covering explosion-proof standards, installation and overhaul techniques, safety regulations, etc., followed by theoretical and practical assessments.

    Submission of Application and Documents: After passing the assessment, submit the qualification application in the name of the enterprise, together with the business license, personal certificates and other supporting materials.

    Issuance of Certificates: Upon approval, the enterprise qualification certificate and personal certificates will be issued, usually within 7–15 working days.


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