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Table 1. Estimated effects of 60 Hz AC currents* ( ?0 R% c# P& J( z3 r# C* [5 H3 ]1 E
7 J2 t" W! k% x! Z1 mA Barely perceptible
# o ?! \, U6 q$ I1 _* h/ [16 mA Maximum current an average man can grasp and “let go” 7 p' N0 y {6 L6 j
20 mA Paralysis of respiratory muscles , R/ t2 p0 ^7 H/ a
100 mA Ventricular fibrillation threshold
- r/ x- I: d6 y8 T H2 A Cardiac standstill and internal organ damage 2 h6 ]7 P- n% u0 ]0 z
15/20 A Common fuse breaker opens circuit† / K, }7 U `$ ^8 K5 P- Y8 S- x5 C, m. E
8 Z( _2 o# T; C8 Z2 V
*From NIOSH.1 5 x0 Z% D: h0 x% |7 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.
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