Across
- 3. The case or housing of apparatus- or the fence or walls surrounding an installation to prevent personnel from unintentionally contacting energized electrical conductors or circuit parts or to protect the equipment from physical damage.
- 4. The overhead conductors between the utility electric supply system and the service point.
- 9. An approach limit at a distance from exposed live parts within which a worker could receive a second degree burn if an electrical arc flash were to occur. Defines the point which FR protection is necessary to avoid a second degree burn.
- 11. Suitable for carrying electric current.
- 12. A device or group of devices that serves to govern, in some predetermined manner, the electric power delivered to the apparatus to which it is connected.
- 13. An organization, office, or individual responsible for enforcing the requirements of a code or standard, or for the approving equipment, materials, an installation, or a procedure.
- 15. The rating value attributed to materials that describes their performance to exposure to an electrical arc discharge.
- 17. The value assigned to a cell or battery of a given voltage class for the purpose of convenient designation; the operating voltage of the cell or system may vary above or below this value.
- 18. A dangerous condition associated with the release of energy caused by an electric arc.
- 25. The circuit conductors between the final overcurrent device protecting the circuit and the outlet(s).
- 28. All circuit conductors between the services equipment, the source of a separately derived system, or other power supply source and the final branch-circuit overcurrent device.
- 29. The point of connection between the facilities of the serving utility and the premises wiring.
- 30. An enclosure that is designed for either surface mounting or flush mounting and is provided with a frame, mat, or trim in witch a swinging door or doors are or can be hung.
- 31. Free from any electrical connection to a source of voltage.
- 32. One who has demonstrated skills and knowledge related to the construction and operation of electrical equipment and installations and has received safety training to identify and avoid the hazards involved.
- 33. A ground potential gradient (difference) that can cause current flow from foot to foot through the body.
- 34. The person in charge of the premises, or other persons appointed or selected by the person in charge of the premises who performs certain duties associated with stationary storage batteries.
- 38. The basic electrochemical unit, characterized by an anode and a cathode used to receive, store, and deliver electrical energy.
- 40. Any current in excess of the rated current of equipment or the ampacity of a conductor.
- 41. 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.
- 43. One or more cells chosen to represent the operating parameters of the entire battery (sometimes called “temperature reference” cell).
- 44. The highest level of fault current that could theoretically occur at a point on a circuit. This is the fault current that can flow in the event of a zero impedance short circuit and if no protection devices operate.
- 46. A dangerous condition associated with the possible release of energy caused by contact with or approach to live parts.
- 47. The underground conductors between the utility electric supply system and the service point.
- 48. Connected to establish electrical con¬tinuity and conductivity.
- 49. An approach limit at a distance from an exposed live part within which a shock hazard exists.
Down
- 1. An assembly of one or more en¬closed sections having a common power bus and princi¬pally containing motor control units.
- 2. A physical obstruction to prevent unauthorized access to a work area and to limit access.
- 3. A dangerous condition such that con¬tact or equipment failure can result in electric shock, arc flash burn, thermal burn, or blast.
- 5. Operation of equipment in excess of normal, full-load rating, or of a conductor in excess of rated ampacity that, when it persists for a sufficient length of time, would cause damage or dangerous overheating.
- 6. A mechanical switching device used for isolating a circuit or equipment from a power source of power.
- 7. A conducting object through which a direct connection to earth is established.
- 8. A ground potential gradient (difference) that can cause current flow from hand to hand or hand to foot through the body.
- 10. A device designed to open and close a circuit by non-automatic means and to open the circuit au¬tomatically on a predetermined overcurrent without damage to itself when properly applied within its rating.
- 14. 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.
- 16. An approach limit at a distance from an exposed live part within which there is an increased risk of shock due to electrical arc-over combined with inadvertent movement for personnel working in close proximity to the live part.
- 19. A device in¬tended for the protection of personnel that functions to de-energize a circuit or portion thereof within an established period of time when a current to ground exceeds the values established for a Class A device.
- 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.
- 21. The largest amount of current capable of being delivered at a point on the system during a short circuit condition.
- 22. The distance between a person’s face and chest area and a prospective arc source.
- 23. Without live parts exposed to a person on the operating side of the equipment
- 24. An assembly of a fuse support with either a fuseholder or fuse carrier, or disconnecting blade.
- 26. An approach limit at a distance from exposed live parts within which work is considered the same as making contact with live parts.
- 27. Not readily accessible to persons unless special means for access are used.
- 35. Electrically connected to, or is, a source of voltage.
- 36. A solid, liquid, or aqueous immobilized liquid medium that provides the ion transport mechanism between the positive and negative electrodes of a cell.
- 37. The property of a material whereby combustion is prevented, terminated, or inhibited following a source of ignition with or without subsequent removal of the ignition source.
- 39. An overcurrent protective device with a circuit-opening fusible part that is heated and severed by the pas-sage of overcurrent through it.
- 42. A unit of an electrical system, other than a conductor, that carries or controls electric energy as its principal function.
- 45. The amount of current delivered at a point on the system during a short circuit condition.