NFPA 70E QUESTIONS AND ANSWERS ALREADY PASSED

NFPA 70E QUESTIONS AND ANSWERS ALREADY PASSED Arrangement of 70E Introduction (Article 90) Chapter 1 Safety Related Work Practices Chapter 2 Safety Related Maintenance Requirements Chapter 3 Safety Requirements for Special Equipment Annexes (Article 350) Arc Flash Hazard A dangerous condition associated with the possible release of energy caused by an electric arc Arc Rating The value attributed to materials that describes their performance to exposure to an electrical arc discharge. The arc rating is expressed in cal/cm^2 and is derived from the determined value of the arc thermal performance value (ATPV) or energy of breakopen threshold (E BT) (should a material system exhibit a breakopen resoponce below the APTV value). Arc rating is reported as either APTV or E bt, whichever is the lower value. Barricade A physical obstruction such as tapes, cones, or A-frame-type wood or metal structures intended to provide a warning and to limit access. Barrier 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. Shock boundaries Limited approach boundary, Restricted approach boundary, Prohibited approach boundary (not in 2015) Limited approach boundary An approach limit at a distance from an exposed energized electrical conductor or circtuit part within which a shock hazard exists. Restricted approach boundary An approach limit at a distance from an exposed energized electrical conductor or circuit part within which there is an increased likelihood of electric shock, due to electrical arc-over combined with inadvertent movement, for personnel working in close proximity to the energized electrical conductor or circuit part. Arc Flash Boundary When an arc flash hazard exists, an approach limit at a distance from a prospective arc source within which a person could receive a second degree burn if an electrical arc flash were to occur. Electrically safe work condition A state in which an electrical conductor or circuit part has been disconnected from energized parts, locked/tagged in accordance with established standards, tested to ensure the absence of voltage, and grounded if determined necessary. Hazard A source of possible injury or damage to health