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Table 1. Estimated effects of 60 Hz AC currents* $ y: k7 R# h4 ~4 F% E& y
) n! r$ T' F" {: ]7 s
1 mA Barely perceptible & R7 ], F9 G$ R; ~5 @
16 mA Maximum current an average man can grasp and “let go”
( Y* u6 i+ b0 T9 ?6 m% ^3 S2 A20 mA Paralysis of respiratory muscles 3 X" `' m7 h; L1 Q% a/ C; l
100 mA Ventricular fibrillation threshold
* J& [9 _+ n0 A) w9 N2 A Cardiac standstill and internal organ damage # d; N# F9 ^; j" _
15/20 A Common fuse breaker opens circuit† + y) ~7 ]4 i4 X7 X
2 M5 ?. |/ e8 o6 B
*From NIOSH.1
# F$ Z8 t0 ~! A, {( D! \5 N†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. ) M4 t0 ^" | V" i o0 c
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