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Table 1. Estimated effects of 60 Hz AC currents*
# m5 I, x; V6 T. [. u " _5 Z. P- c5 G0 C/ r
1 mA Barely perceptible
" r: \1 B/ w9 D) I; B16 mA Maximum current an average man can grasp and “let go”
* M: o$ Y q8 z20 mA Paralysis of respiratory muscles
! I+ q) T; A4 M$ z100 mA Ventricular fibrillation threshold 5 q2 P2 Y& |& n Q, ?
2 A Cardiac standstill and internal organ damage
; H8 K+ p/ j$ u4 T+ k15/20 A Common fuse breaker opens circuit† " {- B5 j# L' w, ~& F# ~
" r* }2 r; j- o) h; j4 C+ H*From NIOSH.1 . Q. j$ ~' v! 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. * u) e+ [6 _) k9 R, Z- _% r$ P* X
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