The 2013 edition refines the allowable body current based on updated biomedical research. The standard now uses a 50 kg (110 lb) and 70 kg (154 lb) body weight model more accurately. The tolerable step and touch voltages are recalculated using these refined models, generally resulting in slightly more conservative (safer) limits than the 2000 edition for the same fault clearing time.
For those familiar with the previous iteration, the 2013 version introduced several critical technical shifts: ieee standard 80-2013 pdf
) and compare them against the tolerable limits. If the actual voltages exceed the limits, the design must be refined (e.g., by adding more conductors or ground rods). Academia.edu Key Technical Parameters Description Typical Target Value cap R sub g Ground Resistance (large substations); (distribution) Step Voltage Voltage between feet 1m apart Must be less than tolerable cap E sub s t e p end-sub Touch Voltage Voltage between hand and feet Must be less than tolerable cap E sub t o u c h end-sub Grid Depth Burial depth of the mat Common range: 0.5m to 1.5m Official Access & Resources Official Document : You can purchase or access the full text through the IEEE Xplore Digital Library Sample Calculations : For a detailed walkthrough of the math, review Annex B of the standard , which provides complex design examples. IEEE Guide for Safety in AC Substation - Grounding The 2013 edition refines the allowable body current