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Table 1. Estimated effects of 60 Hz AC currents*
7 Z* l2 z" Z; t5 i
" R2 @# w4 m$ n1 mA Barely perceptible
3 f4 A7 p) `2 l# o3 y. h# o* e16 mA Maximum current an average man can grasp and “let go” 8 u. |$ C% w$ ?! m2 u' y
20 mA Paralysis of respiratory muscles F- H/ O5 @8 G1 p Y
100 mA Ventricular fibrillation threshold " |/ g: Z9 O, g7 C
2 A Cardiac standstill and internal organ damage
" e2 Q& a q+ Z2 {6 n15/20 A Common fuse breaker opens circuit† % l, f; b. W* E8 ~7 [) p6 e
2 t3 j2 Y1 {9 T% `' F# B* H# d
*From NIOSH.1
: D+ F: h4 v( b" i†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. # k* i. X( c* q2 S7 c0 \
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