How The National Grid Works!

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Across
  1. 2. they are built into the walls of a building to provide places to safely plug electrical appliances
  2. 3. controls the flow of electricity to the building
  3. 6. they need a source of energy like coal to generate electricity
Down
  1. 1. this draws the electrical energy needed from the mains supply
  2. 4. they support overhead cables or power lines to transfer power from power stations to substations
  3. 5. high voltage electricity is reduced to a lower voltage for the buildings where it will be used
  4. 6. it goes into a wall socket and connects the electrical appliance to the circuit