| | Scope | How it works with IEEE 80 | | --- | --- | --- | | NESC (C2-2017) | US utility safety | Uses IEEE 80 criteria for substation grounding compliance. | | IEC 61936-1 | International HV substations | Different tolerable voltage limits; cross-check formulas in Annex J of IEEE 80. | | NFPA 70E | Worker arc-flash safety | Refers to IEEE 80 for grounding to prevent shock during maintenance. |
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: Limits for tolerable touch and step voltages to protect personnel from electric shock. Grid Design | | Scope | How it works with
: The potential difference between a person's hand (touching a grounded object) and their feet during a fault. Its primary purpose is to provide a safe
The earthing system, also known as the grounding system, is an essential part of any electrical power system. Its primary purpose is to provide a safe path for fault currents to flow to the earth, thereby protecting people and equipment from electrical shocks. A well-designed earthing system is crucial to ensure the safety and reliability of the power system. The IEEE Std 80-2013, "IEEE Guide for Safety in AC Substation Earthing," provides guidelines for the design and testing of earthing systems.