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Table 1. Estimated effects of 60 Hz AC currents*
9 e+ e) u# x% q+ b: N
" q$ A9 b8 U- b) D% k! u5 k7 E1 mA Barely perceptible ( o% P" N- g. |
16 mA Maximum current an average man can grasp and “let go” ! }* Q9 @; O1 ^: h
20 mA Paralysis of respiratory muscles . e: m; p$ X/ r' b" }; O0 _* f
100 mA Ventricular fibrillation threshold
/ f. H2 T1 `# ^ O2 A Cardiac standstill and internal organ damage
* D9 ]; Q- |* H2 `% y# Z4 H15/20 A Common fuse breaker opens circuit† 1 v0 Y& j, s* \$ S4 i6 t
# V# v: X0 s0 q/ N3 F9 _$ L*From NIOSH.1
0 w* h6 V+ M. I, D' J+ `& {2 a% Z†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. $ r) j2 y3 \ i" x: o
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