Ieee Standard 80-2013 Pdf !!top!! -

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.

Not all available fault current goes to ground. The standard teaches you how to calculate the maximum grid current, including asymmetry factors and future system growth. ieee standard 80-2013 pdf

Be very wary of "free PDF" websites. Many contain malware, or worse, they host the draft version (which was never finalized) or the superseded 2000 edition. For safety-critical design, you must have the final, corrected 2013 version. The 2013 edition refines the allowable body current