Introduction to Electrical Safety

What Is Electricity?

  • All matter is made up of atoms, and atoms are made up of smaller particles
  • The three main particles making up an atom are the proton, the neutron and the electron
  • The simple definition of “ELECTRICITY” is the flow of electrons through a conductor
  • Electricity is conducted through some materials better than others
  • Its resistance measures how well something conducts electricity
  • Some things hold their electrons very tightly
  • Electrons do not move through them very well
  • These things are called insulators
    • Rubber, plastic, cloth, glass and dry air are good insulators and have very high resistance.
  • Other materials have some loosely held electrons, which move through them very easily
  • These are called conductors
    • Most metals -- like copper, aluminum or steel -- are good conductors
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