arc flash

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Across
  1. 4. the property of a material whereby combustion is prevented, terminated, or inhibited following the application of a flaming or non-flaming source of ignition, with or without subsequent removal of the ignition source
  2. 8. free from an electrical connection to a source of potential difference and from electrical charge
  3. 9. value attributed to materials that describes their performance on exposure to an electrical arc discharge
  4. 10. the potential difference between a grounded metal structure and a point on the earth's surface separated by a distance equal to normal maximum horizontal reach
  5. 11. an overall process that identifies hazards, estimates the potential severity of injury or damage to health, estimates the likelihood of occurrence of injury or damage to health and determines if protective measures are required
  6. 15. in electric arc testing, a material response evidenced by the formation of one or more holes in the material, which may allow thermal energy to pass through the material
  7. 17. a connection to earth obtained by a grounding electrode
  8. 18. any channel designed for holding wires, cables, or busbars
  9. 20. a physical obstruction that is intended to prevent contact with equipment or energized electrical conductors and circuit parts or to prevent unauthorized access to a work area
  10. 21. separated from other conducting surfaces by a dielectric offering a high resistance to the passage of current
Down
  1. 1. any electrical circuit, other than a communication circuit, that supplies energy to a device that gives a recognizable signal, such a circuit for doorbells, buzzers, code-calling systems, signal lights, etc
  2. 2. the greatest root-mean-square difference of potential between two conductors of a curcuit
  3. 3. the amount of thermal energy, impressed on a surface a certain distance from the source, generated during an electrical arc event
  4. 5. a combination of the likelihood of occurrence of injury or damage to health and the severity of injury or damage to health that results from a hazard
  5. 6. a wire, cable, or other form of metal installed for the purpose of conveying electric current from one piece of electrical equipment to another or to ground
  6. 7. placement of a lock on an energy-isolating device in accordance with an established procedure
  7. 12. equipment designed to withstand the effects of an internal arcing fault and that directs the internally released energy away from the worker
  8. 13. a ground potential gradient difference that can cause current flow from foot to foot through the body
  9. 14. electrically connected to or is a source of voltage
  10. 15. a low-impedance path that is obtained by permanently joining all non-current-carrying metal parts to ensure electrical continuity and has the capacity to conduct safely any current likely to be imposed on it
  11. 16. the basic electrochemical unit, characterized by an anode and a cathode used to receive, store, and deliver electrical energy
  12. 19. a source of possible injury or damage to health