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Shock hazard

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College Physics I – Introduction

Definition

A shock hazard occurs when electrical current passes through a person's body, potentially causing injury or death. It is often the result of direct contact with live wires or faulty electrical devices.

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5 Must Know Facts For Your Next Test

  1. Shock hazards can cause severe burns, cardiac arrest, and muscle contractions.
  2. The severity of an electric shock is influenced by the current's magnitude, the path it takes through the body, and the duration of exposure.
  3. Current above 10 milliamperes (mA) can cause painful to severe shocks; above 100 mA can be fatal.
  4. Ground-fault circuit interrupters (GFCIs) are safety devices designed to protect against shock hazards by quickly cutting off power when a ground fault is detected.
  5. Wet conditions increase the risk of shock hazards because water reduces skin resistance and allows more current to flow through the body.

Review Questions

  • What factors influence the severity of an electric shock?
  • At what current level can an electric shock become potentially fatal?
  • How do ground-fault circuit interrupters (GFCIs) help prevent shock hazards?
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