ASTM B401-99
(Specification)Standard Specification for Compact Round Concentric-Lay-Stranded Aluminum Conductors, Steel-Reinforced (ACSR/COMP)
Standard Specification for Compact Round Concentric-Lay-Stranded Aluminum Conductors, Steel-Reinforced (ACSR/COMP)
SCOPE
1.1 This specification covers compact round concentric-lay-stranded conductors made from aluminum 1350-H19 (extra hard) wires and round zinc-coated, aluminum-coated, or aluminum-clad steel core wires usually used in overhead lines. These conductors shall be constructed with one steel core wire surrounded by one or more layers of helically-laid compacted or otherwise shaped aluminum wires (Explanatory Notes 1 and 2).
1.2 Compact ACSR covered by this specification has five types of steel core wire which are designated by abbreviations as follows (Explanatory Note 2).
1.2.1 ACSR/GA/COMP -Compact ACSR using Class A zinc-coated steel wire,
1.2.2 ACSR/GB/COMP -Compact ACSR using Class B zinc-coated steel wire,
1.2.3 ACSR/GC/COMP -Compact ACSR using Class C zinc-coated steel wire,
1.2.4 ACSR/AZ/COMP -Compact ACSR using aluminum-coated (aluminized) steel wire, and
1.2.5 ACSR/AW/COMP -Compact ACSR using aluminum-clad steel wire.
1.3 The SI values of density and resistivity are to be regarded as standard. For all other properties the inch-pound values are to be regarded as standard and the SI units may be approximate. Note 1-Prior to 1975, aluminum 1350 was designated as EC aluminum. Note 2-The aluminum and temper designations conform to ANSI H35.1. Aluminum 1350 corresponds to Unified Numbering System A91350 in accordance with Practice E527.
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Designation: B 401 – 99
Standard Specification for
Compact Round Concentric-Lay-Stranded Aluminum
Conductors, Steel-Reinforced (ACSR/COMP)
This standard is issued under the fixed designation B 401; 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.
1. Scope B 230 Specification for Aluminum 1350-H19 Wire for Elec-
trical Purposes
1.1 This specification covers compact round concentric-lay-
B 232 Specification for Concentric-Lay-Stranded Alumi-
stranded conductors made from aluminum 1350-H19 (extra
num Conductors, Coated Steel Reinforced (ACSR)
hard) wires and round zinc-coated, aluminum-coated, or
B 263 Test Method for Determination of Cross-Sectional
aluminum-clad steel core wires usually used in overhead lines.
Area of Stranded Conductors
These conductors shall be constructed with one steel core wire
B 341 Specification for Aluminum-Coated (Aluminized)
surrounded by one or more layers of helically-laid compacted
Steel Core Wire for Aluminum Conductors, Steel-
or otherwise shaped aluminum wires (Explanatory Note 1 and
Reinforced (ACSR/AZ)
Note 2).
B 354 Terminology Relating to Uninsulated Metallic Elec-
1.2 Compact ACSR covered by this specification has five
trical Conductors
types of steel core wire which are designated by abbreviations
B 498 Specification for Zinc-Coated (Galvanized) Steel
as follows (Explanatory Note 2).
Core Wire for Aluminum Conductors, Steel Reinforced
1.2.1 ACSR/GA/COMP—Compact ACSR using Class A
(ACSR)
zinc-coated steel wire,
B 502 Specification for Aluminum-Clad Steel Core Wire for
1.2.2 ACSR/GB/COMP—Compact ACSR using Class B
Aluminum Conductors, Aluminum-Clad Steel Reinforced
zinc-coated steel wire,
B 802 Specification for Zinc-5 % Aluminum-Mischmetal
1.2.3 ACSR/GC/COMP—Compact ACSR using Class C
Alloy-Coated Steel Core Wire for Aluminum Conductors,
zinc-coated steel wire,
Steel Reinforced (ACSR)
1.2.4 ACSR/AZ/COMP—Compact ACSR using aluminum-
E 29 Practice for Using Significant Digits in Test Data to
coated (aluminized) steel wire, and
Determine Conformance with Specifications
1.2.5 ACSR/AW/COMP—Compact ACSR using aluminum-
E 527 Practice for Numbering Metals and Alloys (UNS)
clad steel wire.
2.3 Other Documents:
1.3 The SI values of density and resistivity are to be
ANSI H35.1, American National Standard Alloy and Tem-
regarded as standard. For all other properties the inch-pound
per Designation Systems For Aluminum
values are to be regarded as standard and the SI units may be
NBS Handbook 100—Copper Wire Tables of the National
approximate.
Bureau of Standards
NOTE 1—Prior to 1975, aluminum 1350 was designated as EC alumi-
num.
3. Ordering Information
NOTE 2—The aluminum and temper designations conform to ANSI
3.1 Orders for material under this specification shall include
H35.1. Aluminum 1350 corresponds to Unified Numbering System
the following information:
A91350 in accordance with Practice E 527.
3.1.1 Quantity of each size and stranding (Table 1),
2. Referenced Documents
3.1.2 Conductor size: circular-mil area or AWG (Section 6,
and Table 1),
2.1 The following documents of the issue in effect on date
3.1.3 Steel wire coating or aluminum-clad (see 11.3),
of material purchase form a part of this specification to the
3.1.4 Special tension test, if required (see 15.3),
extent referenced herein.
2.2 ASTM Standards:
Annual Book of ASTM Standards, Vol 02.03.
Annual Book of ASTM Standards, Vol 14.02.
1 4
This specification is under the jurisdiction of ASTM Committee B-1 on Annual Book of ASTM Standards, Vol 01.01.
Electrical Conductors, and is the direct responsibility of Subcommittee B01.07 on Available from the American National Standards Institute, 11 West 42nd St.,
Conductors of Light Metals. 13th Floor, New York, NY 10018.
Current edition approved April 10, 1999. Published June 1999. Originally Available from the National Technical Information Service, 5285 Port Royal
published as B 401 – 63 T. Last previous edition B 401 – 92. Rd., Springfield, VA 22161.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 401
TABLE 1 Construction Requirements for Compact Round Concentric-Lay-Stranded Aluminum Conductors, Steel Reinforced
Required Construction Nominal Mass for Conductors With:
Compact
Conductor Size Steel Wire Aluminum-Clad
Number of
Conductor Coated Steel Core Wire
(Aluminum Wires) Diameter Steel Core Wire
Aluminum
Diameter
Wires
cmil mm AWG in. mm in. mm lb/1000 ft kg/km lb/1000 ft kg/km
336 400 170.5 . 18 0.1367 3.472 0.628 15.95 364.8 542.8 357.2 531.5
266 800 135.2 . 18 0.1217 3.091 0.559 14.20 289.1 430.2 283.1 421.3
211 600 107.2 0000 6 0.1878 4.770 0.517 13.13 290.8 432.7 276.5 411.5
167 800 85.03 000 6 0.1672 4.247 0.461 11.71 230.5 343.0 219.2 326.1
133 100 67.44 00 6 0.1489 3.782 0.410 10.41 182.8 272.0 173.8 258.7
105 600 53.51 0 6 0.1327 3.371 0.365 9.27 145.2 216.0 138.1 205.4
83 690 42.41 1 6 0.1181 3.000 0.326 8.28 115.0 171.1 109.4 162.7
66 360 33.62 2 7 0.1299 3.299 0.298 7.57 106.6 158.7 99.8 148.5
66 360 33.62 2 6 0.1052 2.672 0.290 7.37 91.2 135.8 86.8 129.1
52 620 26.66 3 6 0.0937 2.380 0.258 6.55 72.4 107.7 68.8 102.4
41 740 21.15 4 7 0.1029 2.614 0.236 5.99 67.0 99.6 62.7 93.3
41 740 21.15 4 6 0.0834 2.118 0.229 5.82 57.3 85.3 54.5 81.1
26 240 13.30 6 6 0.0661 1.679 0.182 4.62 36.0 53.6 . .
3.1.5 Place of inspection (Section 16), and 7. Rated Strength of Conductor
3.1.6 Packaging and Package Marking (Section 17).
7.1 The rated strength of a completed conductor shall be
taken as the aggregate strength of the aluminum and steel
4. Joints
components, calculated as follows: The strength contribution
of the aluminum wires shall be taken as the percentage,
4.1 Electric-butt welds, electric-butt, cold-upset welds, or
according to the number of layers of aluminum wires, indicated
cold-pressure welds in the individual round-drawn or shaped
in Table 2, of the sum of the strengths of the 1350-H19 wires,
aluminum wires may be made during the stranding process. No
calculated on the basis of the nominal wire diameter for the
weld shall occur within 50 ft (15 m) of a weld in the same wire
corresponding noncompacted construction given in Specifica-
or in any other wire of the completed conductor.
tion B 232 and the appropriate specified minimum average
4.2 There shall be no joints of any kind made in the finished
tensile strength given in Specification B 230. The strength
coated, or aluminum-clad steel wires.
contribution of the steel core shall be taken as 96 % of the
strength of the steel wire calculated from its specified nominal
5. Lay
diameter and the appropriate specified minimum stress at 1 %
5.1 The preferred lay of the aluminum wires of aluminum
extension given in Specification B 341, B 498, B 502, or
conductors, steel-reinforced, having a single wire steel core
B 802, whichever is applicable.
and one layer of aluminum wires is 14 times the outside
7.2 Rated strength and breaking strength values shall be
diameter of the conductor but the lay shall be not less than 13
rounded to three significant figures, in the final value only, in
nor more than 16 times that diameter.
accordance with Practice E 29.
5.2 The preferred lay of the outside layer of aluminum wires
7.3 Rated strength of conductors are given in Table 3.
of aluminum conductors, steel-reinforced, having multiple
layers of aluminum wires is 12 times the outside diameter of
8. Density
the conductor but the lay shall be not less than 11 nor more
8.1 For the purpose of calculating mass, mass per unit
than 14 times that diameter.
length, cross sections, etc., the density of aluminum 1350 shall
5.3 The preferred lay of the layer immediately beneath the 3 3
be taken as 2705 kg/m (0.0975 lb/in. ) at 20°C.
outside layer of aluminum wires of aluminum conductors,
8.2 For the purpose of calculating mass, mass per unit
steel-reinforced, having multiple layers of aluminum wires is
length, cross sections, etc., the density of coated steel wire shall
14 times the outside diameter of such layer but the lay shall be 3 3
be taken as 7780 kg/m (0.281 lb/in. ) at 20°C.
not less than 11 nor more than 17.5 times that diameter.
8.3 For the purpose of calculating mass, mass per unit
5.4 The direction of lay of the outside layer of aluminum
length, cross sections, etc., the density of aluminum-clad steel
3 3
wires shall be right hand.
wire shall be taken as 6590 kg/m (0.2381 lb/in. ) at 20°C.
5.5 The direction of lay shall be reversed in successive
layers.
TABLE 2 Strength Rating Factors
Stranding Rating Factor, %
6. Construction
Number of Wires Number of Layers
Aluminum Steel
Aluminum Steel Aluminum Steel
6.1 The diameter of the steel core wire, the number of
A
61 1 96 96
aluminum wires, the aluminum cross-sectional area, the diam-
A
71 1 96 96
A
eter and weight of the compact round concentric-lay-stranded
18 1 2 93 96
aluminum conductors, steel-reinforced, shall be as shown in A
Central steel wire only: the 96 % Rating Factor is applied to the single steel
Table 1. wire core in the event it contains a weld (made prior to drawing).
B 401
TABLE 3 Rated Strengths for Compact Round Concentric-Lay-Stranded Aluminum Conductors, Steel-Reinforced
Rated Strength For Conductors With:
Aluminum-
Conductor Size
Coated Aluminum-Clad
Coated Steel Core Wire:
Steel Core
...
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