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Table 1. Estimated effects of 60 Hz AC currents*
" ], d( v* }) h( P3 s
* \% X; k7 K, g8 P0 H' B1 mA Barely perceptible
/ C$ ]: G7 X' ]4 f$ {16 mA Maximum current an average man can grasp and “let go” & L8 V& U6 X. _2 U, C+ M4 H, D
20 mA Paralysis of respiratory muscles 5 y/ a2 E* U$ e+ O7 {0 f7 P. j- m
100 mA Ventricular fibrillation threshold 2 Z. X3 h6 i. W& |; T
2 A Cardiac standstill and internal organ damage 9 C8 p7 G: O; g! Q) a" g0 w
15/20 A Common fuse breaker opens circuit† }' Z0 u$ H3 _( x- `
2 C: J4 J; x3 ?8 N7 b9 q- j
*From NIOSH.1
a: ~4 n) `6 @! G†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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