Electrical conductors and insulators

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Across
  1. 4. A person with specialized training and equipment to work with electrical systems
  2. 7. Most ___________ conduct electricity.
  3. 8. A material that electricity can go through easily
  4. 9. Wires and electrical cables are usually made of ____________ .
  5. 10. What do wires have around them for protection?
  6. 12. You must never put out an electrical fire with this.
Down
  1. 1. You must not use electrical appliances in this room.
  2. 2. If you touch an electrical wire with wet hands, you can be _____________ .
  3. 3. This is a good example of an insulator
  4. 5. Electrical appliances change _____________ into light, heat, sound, or movement.
  5. 6. A material that electricity cannot go through
  6. 11. If someone near you touches a live electrical wire, you must not __________ them.