Electrical

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Across
  1. 4. the set of contacts made in a switch
  2. 6. tool used for electrical troubleshooting
  3. 7. the path that alternating current uses to return to the source
  4. 8. the part of a switch that gets energized with 24 volts
Down
  1. 1. the connector used to put on the end of a wire
  2. 2. a common source of power for direct current
  3. 3. where excess electricity goes when there's an issue
  4. 5. the line of power going through a switch