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NFPA 70E QUESTIONS AND ANSWERS
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Accessible (as applied to equipment) ✔✔Admitting close approach; not guarded by locked doors, elevation, or other effective means.
Accessible (as applied to wiring methods) ✔✔Capable of being removed or exposed without damaging the building structure or finish or not permanently closed in by the structure or finish of the building.
Accessible, Readily (Readily Accessible) ✔✔Capable of being reached quickly for operation, renewal, or inspections without requiring those to whom ready access is requisite to take actions such as to use tools (other than keys), to climb over or under, to remove obstacles, or to resort to portable ladders, and so forth.
Arc Flash Hazard ✔✔A source of possible injury or damage to health associated with the release of energy caused by an electric arc.
What elements increase the likelihood of an arc flash incident? ✔✔When energized electrical conductors or circuit parts are exposed or when they are within equipment in a guarded or
enclosed condition, provided a person is interacting with the equipment in such a manner that could cause an electric arc.
Arc Flash Suit ✔✔A complete arc-rated clothing and equipment system that covers the entire body, except for the hands and feet.
Arc Rating ✔✔The value attributed to materials that describes their performance to exposure to an electrical arc discharge. This is expressed in cal/cm2 and is derived from the determined value of the arc thermal performance value or energy of breakopen threshold.
How is arc rating reported? ✔✔ATPV (arc thermal performance value) or Ebt (energy of breakopen threshold), whichever is the lower value.
Attachment Plug (Plug Cap) ✔✔A device that, by insertion in a receptacle, establishes a connection between the conductors of the attached flexible cord and the conductors connected permanently to the receptacle.
Authority Having Jurisdiction (AHJ) ✔✔An organization, office, or individual responsible for enforcing the requirements of a code or standard, or for approving equipment, materials, an installation, or a procedure.
Stoll Skin Burn Injury Model ✔✔The onset of a second degree burn on unprotected skin is likely to occur at an exposure of 1.2 cal/cm2 for one second - equals incident energy when an arc flash hazard exists.
Boundary, Limited Approach ✔✔An approach limit at a distance from an exposed energized electrical conductor or circuit part within which a shock hazard exists.
Boundary, Restricted Approach ✔✔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.
Branch Circuit ✔✔The circuit conductors between the final over-current device protecting the circuit and the outlet(s).
Circuit Breaker ✔✔A device designed to open and close a circuit by nonautomatic means and to open the circuit automatically on a predetermined overcurrent without damage to itself when properly applied within its rating.
Conductive ✔✔Suitable for carrying electric current.
Conductor, Bare ✔✔A conductor having no covering or electrical insulation whatsoever.
Conductor, Covered ✔✔A conductor encased within material of composition or thickness that is not recognized by this Code as electrical insulation.
Conductor, Insulated ✔✔A conductor encased within material of composition and thickness that is recognized by this Code as electrical insulation.
Controller ✔✔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.
