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Table 1. Estimated effects of 60 Hz AC currents*
, G! u8 L. z$ m! {" ^/ N# R
: b: q& C2 h, P8 ?1 r$ V1 mA Barely perceptible / ~% @4 z7 V7 L: w) ]) ]5 \9 T2 B
16 mA Maximum current an average man can grasp and “let go” 0 r* ^) M+ a0 }" g& A t) `
20 mA Paralysis of respiratory muscles ; a3 [8 v$ L, D7 m$ y8 Y
100 mA Ventricular fibrillation threshold
+ S% |6 q0 R4 S P* p6 w2 A Cardiac standstill and internal organ damage - Q! _( w; {1 ^% t% ]
15/20 A Common fuse breaker opens circuit†
7 n% _ [5 t( H- r* ?/ C" |3 Y" g# ]1 a 7 c$ [) o" V% A( K$ _: x
*From NIOSH.1
% b' B' t, k9 P†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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