Which electrical code must be adhered to when working in substations?

The National Electrical Code (NEC) is the correct choice when working in substations because it provides the foundational standards for safe electrical design, installation, and inspection to protect people and property from electrical hazards. Substations, which are critical components of electrical power distribution, require adherence to these safety and installation criteria outlined in the NEC.

The NEC includes specific guidelines for various electrical installations, including grounding practices, circuit protection, and equipment ratings, all of which are essential in maintaining safety and operational integrity in substation environments. Compliance with the NEC helps ensure that electricians follow uniform practices that minimize the risk of accidents or failures.

While the other codes and organizations mentioned, such as the IEC, NFPA, and IEEE, provide valuable information and guidelines relevant to electrical engineering and fire safety, they do not specifically define the requirements for electrical wiring and installations in the way that the NEC does. The NEC is particularly tailored for this purpose within the United States, making it the most pertinent and authoritative code for those working directly in substations.