ASTM B354-98

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Designation:B 354–98
Standard Terminology Relating to
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Uninsulated Metallic Electrical Conductors
This standard is issued under the fixed designation B 354; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
These terminologies relate only to interpretations as applied to uninsulated metallic electrical
conductors in specifications under the jurisdiction of ASTM Committee B-1 on Wires for Electrical
Conductors, and do not necessarily correspond to the definitions used in other fields.
1. Scope TW—trapezoidal shaped wire.
Zn-5Al-MM—zinc-5% aluminum-mischmetal alloy coat-
1.1 This terminology standard defines abbreviations and
ing.
terms specific to uninsulated electrical conductors. For terms
relating to superconductors, see Terminology B713.
4. Terminology
2. Referenced Documents 4.1 Definitions:
2.1 ASTM Standards:
aeolian vibration—resonant vibration of a conductor caused
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B713 Terminology Relating to Superconductors
by the alternate shedding of wind-induced vortices from
opposite sides of the conductor. (Frequency is usually less
3. Abbreviations AAC—aluminum conductor.
than 200 Hz and amplitude rarely exceeds one conductor
AACSR—aluminum alloy conductor, steel reinforced.
diameter.)
ACAR—aluminum conductor, aluminum alloy reinforced.
annealed wire—see soft wire.
ACSR—aluminum conductor, steel reinforced.
area density—mass per unit area.
AW—aluminum clad steel wire.
bare conductor—a conductor having no nonmetallic cover-
AZ—aluminum coated (aluminized) steel wire.
ing.
COMP—compact construction.
brazing—the joining of ends of two wires, rods, or groups of
GA—zinc coated (galvanized) steel wire, coating class A.
wires with a nonferrous filler metal at temperatures above
GB—zinc coated (galvanized) steel wire, coating class B.
800°F [427°C].
GC—zinc coated (galvanized) steel wire, coating class C.
breaking strength—the maximum load that a conductor
HS—zinc coated (galvanized) high strength steel wire.
attains when tested in tension to rupture.
MA—zinc-5% aluminum-mischmetal alloy coated steel
bunch-stranded conductor—a conductor composed of wires
wire, coating class A.
twisted together with a given length and direction of lay in
MB—zinc-5% aluminum-mischmetal alloy coated steel
such manner that the respective wires at successive cross
wire, coating class B.
sections along the length of the conductor do not necessarily
MC—zinc-5% aluminum-mischmetal alloy coated steel
form a symmetrical geometric pattern, nor necessarily oc-
wire, coating class C.
cupy the same positions relative to each other.
MS—zinc-5 % aluminum-mischmetal alloy coated high
circular mil (cmil)—a unit of area equal to the area of a circle
strength steel wire.
one mil (0.001 in., 0.0254 mm) in diameter. The area of a
SD—self dampening construction.
circle in circular mils is equal to the square of the diameter
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SIW—single input wire construction.
in mils [area(cmils) = diameter(mils) ], 1 cmil = 7.854 3 10
2 −10 2
−7 in. [5.067 3 10 m ].
clad wire—wire comprised of a given metal covered with a
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This terminology is under the jurisdiction of ASTM Committee B-1 on
relatively thick application of a different metal.
Electrical Conductors and is the direct responsibility of Subcommittee B01.01 on
Editorial and Records. coated wire—wire comprised of a given metal covered with a
Current edition approved Sept. 10, 1998. Published November 1998. Originally
relatively thin application of a different metal.
published as B354–60T. Last previous edition B354–93.
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Annual Book of ASTM Standards, Vol 02.03.
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B354–98
cold-drawing—reducing the cross section by pulling through one or more layers of wires or members are laid helically to
adieordies,atatemperaturelowerthantherecrystallization form a concentric-lay.
temperature. continuous cast drawing stock—the as-rolled section, nor-
combination stranded conductor—a conductor constructed mally round, produced by a continuous casting and rolling
with wires of different diameters with such differences process.
occurring either within a single layer or from layer to layer. core—see conductor core.
compact stranded conductor—a unidirectional or unilay or cored, annular, conductor—a conductor in which one or
conventional concentric conductor, constructed with a cen- more layers of wires are laid helically around a central core
tral core surrounded by one or more layers of helically laid of metallic or nonmetallic material. The c
...