Page 111 - Electrical Safety of Low Voltage Systems

94 Chapter Five

7. The term has been coined after tetanus, a disease of the nervous system that
shows identical symptoms.
8. IEEE 1584–2002 “Guide for Performing Arc-Flash Hazard Calculations” assumes
that persons will suffer second-degree burns if their skin is exposed to incident
2
energies of at least 5 J/cm .
9. Defined as the heat necessary to increase the temperature of a unit volume of
a substance by 1 C.
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10. Based on IEEE Std. 80–2000, “IEEE Guide for Safety in AC Substation Grounding.”
11. IEC TS 604479–1: 2005, “Effects of Current on Human Beings and Livestock.”
12. IEC TS 604479–1: 2005, “Effects of Current on Human Beings and Livestock,”
Table 1.
13. IEEE Std. 80–2000, “IEEE Guide for Safety in AC Substation Grounding,” para-
graph 7.1.
14. Besides dry conditions, body impedance data are also available for water-wet
and saltwater-wet conditions, as well as for medium and small surface areas of
contact. IEC 604479–1 deems the values described by the 50th percentile curve
the most statistically reliable.
15. IEC TS 604479–1: 2005, “Effects of Current on Human Beings and Livestock.”