Summarizing Electric Hazards and the Human Body

Summary

  • The two types of electric hazards are thermal (excessive power) and shock (current through a person).
  • Shock severity is determined by current, path, duration, and AC frequency.
  • This table lists shock hazards as a function of current.
  • This figure graphs the threshold current for two hazards as a function of frequency.

Glossary

thermal hazard

a hazard in which electric current causes undesired thermal effects

shock hazard

when electric current passes through a person

short circuit

also known as a “short,” a low-resistance path between terminals of a voltage source

microshock sensitive

a condition in which a person’s skin resistance is bypassed, possibly by a medical procedure, rendering the person vulnerable to electrical shock at currents about 1/1000 the normally required level

This lesson is part of:

Electric Current, Resistance, and Ohm's Law

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