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University safety guidance says current as low as about how much can cause injury?

Even 3 milliamps can hurt.

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  1. 300 milliamps
  2. 3 amps
  3. 3 milliamps ✔

Why: Your body is far more sensitive to current than most people think. Even a few thousandths of an amp can injure, so treat every circuit as live until tested.

Huh, didn't know that: UVA tells staff to report any electrical shock to a supervisor and seek medical attention.

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Why do electricians tend to fall in love with train drivers? Because they make good conductors.
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References

Answer: 3 milliamps. Your body is far more sensitive to current than most people think. Even a few thousandths of an amp can injure, so treat every circuit as live until tested.

  1. University of Virginia EHS Electrical Safety Awareness ehs.virginia.edu/Electrical-Safety/Awareness
    Electric current through the body, even at levels as low as 3 milliamps, can cause injuries or even death.
    Checked 2026-10-11.

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