Ieee Std 80 2013 -

9.1 Preliminary grid design 9.2 Resistance of grounding grid 9.3 Maximum grid current (I G ) 9.4 Mesh voltage (E m ) calculation (Sverak's method) 9.5 Step voltage (E s ) calculation 9.6 Voltage gradient distribution 9.7 Refinement of grid design (iterative process)

11.1 Alternative methods (deep-driven rods, counterpoise, chemical rods) 11.2 Surface layer improvements ieee std 80 2013

6.1 Division of fault current between grid and neutral 6.2 Asymmetrical current factor (decrement factor) 6.3 Current split factor (grid current vs. remote earth) Overview 1

8.1 Allowable touch voltage 8.2 Allowable step voltage 8.3 Reduction factors (e.g., crushed rock surface layer) ieee std 80 2013

This standard is the definitive guide for designing substation grounding systems to protect personnel from electric shock hazards. 1. Overview 1.1 Scope 1.2 Purpose 1.3 Application

5.1 Design parameters 5.2 Fault current considerations 5.3 Fault duration 5.4 Soil resistivity 5.5 Resistivity measurement techniques (Wenner four-pin method) 5.6 Crushed rock surface layer resistivity