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Table 1. Estimated effects of 60 Hz AC currents*
) p& y3 I+ x& P2 c) C8 V8 ?
! J. D. G& d& w1 mA Barely perceptible
! R; {/ t4 ^# ?7 T+ ?2 B" I7 _5 g16 mA Maximum current an average man can grasp and “let go” ( t9 f: ~& T$ z! v2 x+ ?
20 mA Paralysis of respiratory muscles 9 ?* m- z6 g/ _. c4 y( K4 e8 j
100 mA Ventricular fibrillation threshold + y/ l* V0 E9 s! {7 H0 }
2 A Cardiac standstill and internal organ damage
. S, k' y# L- l) g0 b15/20 A Common fuse breaker opens circuit†
6 s; z* O6 y- v& L% P % _7 }) ?8 f8 |4 t" o5 X7 A
*From NIOSH.1
! [3 r9 H1 X8 n: V5 k% a% I/ K# ^†Contact with 20 mA of current can be fatal. As a frame of reference, common household circuit breaker may be rated at 15, 20, and 30 A. + d2 E8 B3 [$ G m
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