ASTM F819-04a
(Terminology)Standard Terminology Relating to Electrical Protective Equipment for Workers
Standard Terminology Relating to Electrical Protective Equipment for Workers
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Designation:F 819–04a
Standard Terminology
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Relating to Electrical Protective Equipment for Workers
This standard is issued under the fixed designation F 819; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
afterflame time, n—the length of time in seconds for which a compatible—not injurious to or changing the physical or
material continues to flame after the ignition source has been electrical characteristics of the blankets or affecting their
removed. application, use, or acceptability.
cover—an electrically insulated enclosure designed to be
DISCUSSION—In arc testing, the length of time for which a specimen
installed temporarily on various types of irregularly shaped
continues to exhibit a visible flaming as determined by a time display
electrical equipment to protect personnel and equipment
video recording of the specimen during arc testing
working in close proximity.
arc duration, n—time duration of the arc(s).
delta peak temperature, n—differencebetweenthemaximum
arc energy (vi dt), n—sum of the instantaneous arc voltage
temperature and the initial temperature of the sensor during
values multiplied by the instantaneous arc current values
the test, °C.
multiplied by the incremental time values during the arc, (J).
designated person—an individual who is qualified by expe-
arc gap—distance between the arc electrodes (inch).
rience or training to perform an assigned task.
Arc thermal performance value (ATPV), n—in arc testing,
distorted—physically changed from the natural and original
the incident energy on a fabric or material that results in a
shape, caused by stress of any type.
50 % probability that sufficient heat transfer through the
electrical testing facility—a location with qualified personnel,
tested specimen is predicted to cause the onset of a second-
testing equipment, and procedures for the inspection and
degree skin burn injury based on the Stoll curve.
electrical testing of electrical insulating protective equip-
arc voltage, n—voltage across the gap caused by the current
ment.
flowing through the resistance created by the arc gap, V.
electrode—the energized or grounded conductor portion of
blanket roll-up—a container made from fabric or similar
electrical test equipment which is placed near or in contact
materialandspecificallydesignedtoprotecttheblanketfrom
with the material or equipment being tested.
damage during storage or transportation.
electrode clearance—the shortest path from the energized
breakdown, electrical—the electrical discharge or arc occur-
electrode to the ground electrode.
ringbetweentheelectrodesandthroughtheequipmentbeing
embrittlement, n—the formation of a brittle residue as the
tested.
result of pyrolysis or incomplete combustion.
bulk storage—the storage of hose or covers together with one
flashover—the electrical discharge or arc occurring between
or more layers piled neatly, but without the benefit of
electrodes and over or around, but not through, the equip-
spacers, supports, or special protective containers.
ment being tested.
charring, n—the formation of carbonaceous residue as the
foot portion—the portion of the footwear below the wearer’s
result of pyrolysis or incomplete combustion.
ankle bone.
closure, n—point on supply current wave form where arc is
FRP insulating tubes and rods—fiberglass reinforced plastic
initiated.
(FRP) products manufactured so that the tubes and rods
color splash—a splash, smear, or streak of contrasting color
produced will meet the electrical and mechanical require-
evident on the inside or outside surface of the gloves or
ments in the standard.
sleeves that was deposited during the dipping operation and
gauntlet—the area of a glove between the wrist and the
is vulcanized into the material as part of the homogenous
reinforced edge of the opening.
compound.
halogenation treatment—exposure of the entire rubber sur-
face area to a halogen for the purpose of reducing surface
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friction.
These definitions are under the jurisdiction of ASTM Committee F18 on
Electrical Protective Equipment for Workers and are the direct responsibility of
heat attenuation factor HAF, n—in electric arc testing, the
Subcommittee F18.60 on Terminology.
percent of the incident energy which is blocked by a material
Current edition approved Dec. 1, 2004. Published January 2005. Originally
at an incident energy level equal to ATPV.
approved in 1995. Last previous edition approved in 2004 as F 819-04.
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