c.) and that with
alternating current (a. EFFECTS CURRENT PASSING THROUGH THE HUMAN BODY
4., the level danger
varies depending the frequency: low and high frequencies are less dangerous than the
technically applied frequencies and (see Figures 4. more dangerous than d.c.): a.c.c. regards a.1.
Figure 4.1 Probability ventricular fibrillation about %
AC 4. currents (15 100 Hz) persons Description zones:
.2 Probability ventricular fibrillation about %
AC 4.c.1.
Zone
designation
Zone limits Physiological effects
AC 0,5 mA
a
Usually reaction
AC Usually harmful physiological effects
AC Usually organic damage expected
AC above Dangerous pathophysiological effects: cardiac arrest, breathing
arrest and severe burns
AC 4.1.1.EFFECTS CURRENT PASSING THROUGH THE HUMAN BODY 21
4.4). Principles
There difference between the hazard associated with direct (d.1 4.1
Time/current zones effect a.3 above Probability ventricular fibrillation above %
1) For duration current-flow below ms, the limit for the body current for line remains
constant value 200 mA.c
