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Table 1. Estimated effects of 60 Hz AC currents*
/ N& b9 K! R: }6 {6 [
4 p0 J5 [: C+ A; m1 mA Barely perceptible + W S" V7 s" N, D% }8 s
16 mA Maximum current an average man can grasp and “let go” 7 |2 O! D* R% H \2 ~
20 mA Paralysis of respiratory muscles ( a, v! N+ S1 V& H4 D @
100 mA Ventricular fibrillation threshold
@5 _4 o4 P: I! e# L2 x M d2 A Cardiac standstill and internal organ damage
7 v3 t* l0 E' |3 _* K5 N( L* w15/20 A Common fuse breaker opens circuit†
6 b0 O" @! S) z: }$ i
& P. q/ m; E# o! J5 m6 `*From NIOSH.1
5 h) @ }# e: u* T†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.
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