The Role of Registered Master Electricians in Certifying Electrical Installations

The field of electrical engineering is regulated to ensure safety and reliability in the installation, operation, and maintenance of electrical systems. Within this domain, the role of a Registered Master Electrician (RME) is crucial, especially in settings with specific capacity and voltage constraints. This article explores whether RMEs can certify or issue a certificate of safe operating condition for establishments with capacities of up to 500 kVA and voltages up to 600V.

Scope of Practice for Registered Master Electricians

Section 31. Field of Practice. REPUBLIC ACT NO. 7920: A Registered Master Electrician’s (RME) responsibilities include:

  • Installation and wiring of electrical machinery, equipment, and devices.
  • Operation and maintenance of these systems.
  • Repair work across various settings such as residential, commercial, institutional, and industrial buildings, as well as in power plants, substations, watercraft, and electric locomotives.

However, there are limitations to the scope of an RME’s practice, particularly when dealing with installations that exceed 500 kVA or 600V. For these higher capacities and voltages, supervision by a Professional Electrical Engineer (PEE) or a Registered Electrical Engineer (REE) is mandated.

Certification Authority of RMEs

The question of whether an RME can certify or issue a certificate of safe operating condition hinges on several specific regulatory provisions.

Relevant Provisions Under the Law

Section 33. Personnel Required: This section outlines the personnel requirements for various types of electrical installations:

  1. Electric Plants:
    • Any size and voltage: One PEE or one REE.
    • Up to 500 kVA and 600V: One RME.
  2. Industrial Plants, Factories, Commercial Establishments, Institutional Buildings:
    • Any size and voltage: One PEE or one REE.
    • Up to 500 kVA and 600V: One RME.
  3. Watercrafts or Electric Locomotives:
    • Maximum size and voltage: One PEE or one REE.
    • Up to 500 kVA/kW and 600V: One RME.

Additionally, for installations with a connected load of 50 kVA or less and employing voltages not exceeding 250V, an annual inspection and certification of safe operating condition can be conducted by a PEE, REE, or RME.

Practical Implications

Certification Limits

Given the above provisions, RMEs are authorized to certify the safe operating condition of electrical installations under the following conditions:

  • Capacities up to 500 kVA: RMEs can independently certify installations, ensuring that they adhere to safety standards.
  • Voltages up to 600V: Similarly, for voltages not exceeding 600V, RMEs can issue the necessary safety certificates.

Required Supervision for Higher Capacities and Voltages

For installations exceeding the specified limits (over 500 kVA or over 600V), certification must be conducted under the supervision of a PEE or REE. This ensures that the complexities and potential hazards associated with higher capacities and voltages are managed by highly qualified professionals.

Ensuring Safety and Compliance

While RMEs play a significant role in the electrical industry, their certification capabilities are intentionally capped to ensure safety and compliance with regulatory standards. The involvement of PEEs or REEs for larger and more complex systems is a crucial safety measure.

Importance of Regular Inspections

Regular inspections and certifications are vital in maintaining the safety and operational efficiency of electrical installations. Establishments should schedule annual inspections and ensure that they are conducted by qualified personnel, be it RMEs, REEs, or PEEs, depending on the system’s specifications.


Registered Master Electricians can indeed certify or issue certificates of safe operating conditions for establishments with capacities up to 500 kVA and employing voltages up to 600V. This capability is essential for maintaining safety standards in various electrical installations. However, for systems that exceed these parameters, the supervision and certification by Professional Electrical Engineers or Registered Electrical Engineers are mandated to ensure the highest safety and reliability standards. By adhering to these guidelines, the industry ensures the protection of both people and property from electrical hazards.


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