Step & Touch Voltage Calculator

Calculate allowable step and touch voltages for substation grounding design per IEEE 80.

Crushed rock: 2500-10000, Concrete: 20-100, Grass: 100-400 Ω·m.
Ω·m
Thickness of the surface material.
m
Fault clearing time.
seconds
50 kg or 70 kg person.
kg

Results

Surface Derating Factor Cs-
Max Allowable Step Voltage-V
Max Allowable Touch Voltage-V
References: IEEE 80 — Guide for Safety in AC Substation Grounding