Tingling sensation can be expected on a 60-hertz AC circuit when the current passing through the body in milli-amperes is ?

Tingling sensation can be expected on a 60-hertz AC circuit when the current passing through the body in milli-amperes is ?

• A. 5 to 10 mA
• B. 10 to 20 mA
• C. 30 to 50 mA
• D. 0.5 to 3 mA

Answer: (D)

When current at mains frequency (60 Hz) passes through the body, tiny nerves respond to even small amounts of current. The first perceptible sensation is in the very low milliamp range, and a mild tingling is typically reported around 0.5 to about 3 mA. As current increases beyond this, the sensation becomes stronger and other effects appear, such as a more noticeable shock around 5–10 mA and potential muscle contraction around 10–20 mA. Since tingling is a light, early perceptual effect, the current level most consistent with that sensation is roughly 0.5 to 3 mA.

When current at mains frequency (60 Hz) passes through the body, tiny nerves respond to even small amounts of current. The first perceptible sensation is in the very low milliamp range, and a mild tingling is typically reported around 0.5 to about 3 mA. As current increases beyond this, the sensation becomes stronger and other effects appear, such as a more noticeable shock around 5–10 mA and potential muscle contraction around 10–20 mA. Since tingling is a light, early perceptual effect, the current level most consistent with that sensation is roughly 0.5 to 3 mA.