Using Schwarz’s equations (or simplified formulas), the guide helps you calculate the total resistance of the grid to remote earth. A lower Rg is always better.
The IEEE Std 80-2013, titled the "IEEE Guide for Safety in AC Substation Grounding," provides the definitive methodology for designing and evaluating grounding systems to ensure personnel safety during electrical faults. It primarily addresses the mitigation of hazardous touch and step voltages that can occur when a fault current is discharged into the earth. Core Objectives of IEEE Std 80-2013 ieee standard 80-2013 pdf
Establish Safety Limits: Define the maximum allowable body current and the corresponding tolerable touch and step voltages to prevent ventricular fibrillation. The standard itself is often dense theoretical text,
Design Grounding Systems: Provide a systematic procedure for designing a grounding grid that keeps voltage gradients within safe limits. Using Schwarz’s equations (or simplified formulas)
Specify Materials: Offer guidelines for selecting conductors and connections capable of withstanding the thermal and mechanical stresses of fault currents. Key Technical Components
The standard itself is often dense theoretical text, but the annexes are where the practical engineering work happens:
When you open your IEEE Standard 80-2013 PDF, do not read it cover to cover. Use this navigation hack: