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Table 1. Estimated effects of 60 Hz AC currents* - E$ z( Q, c; z& z9 I/ j L) d0 o
! B: ^, v: G! t1 mA Barely perceptible 3 X6 i6 S1 L* C: C
16 mA Maximum current an average man can grasp and “let go” ) m5 i, q( V9 K/ o2 W1 y/ f
20 mA Paralysis of respiratory muscles
& ]! @7 q a, q( l( \; K100 mA Ventricular fibrillation threshold
3 F% H% S' n' J) U2 A Cardiac standstill and internal organ damage
! D% e% U6 Z. s; ~9 ?& L" ?15/20 A Common fuse breaker opens circuit† & }3 l, x" K1 E0 r! a7 F7 ]; b5 I% B
! s; d& A! \, A S. f0 G*From NIOSH.1
. Z4 d0 b4 U- N; e3 F8 B2 \†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. $ p3 s6 g/ R" j5 e) \7 a
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