ASTM B902-04a

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Designation: B902 – 04a
Standard Specification for
Compressed Round Stranded Copper Conductors, Hard,
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Medium-Hard, or Soft Using Single Input Wire Construction
This standard is issued under the fixed designation B902; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope Area of Stranded Conductors
B354 Terminology Relating to Uninsulated Metallic Elec-
1.1 This specification covers stranded conductors made
trical Conductors
from round copper wires, either uncoated or coated with tin,
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2.2 Other Standard:
lead, or lead alloy for general use in insulated conductor
NBS Handbook 100: Copper Wire Tables
assemblies for electrical purposes. These conductors shall be
composed of one or more roller shaped or die closed layers of
3. Classification
helically laid wires using the single input wire (SIW) method-
3.1 The conductors described in this specification are in-
ology. (see Note 1 and Explanatory Note 1)
tendedforsubsequentinsulationorcovering.Theclassification
NOTE 1—Sealed conductors which are intended to prevent longitudinal
of these conductors is SIW compressed.
water propagation and are further covered/insulated, are also permitted
within the guidelines of this specification.
4. Ordering Information
1.2 The values stated in inch-pound or SI units are to be
4.1 Orders for material under this specification shall include
regarded separately as standard. The values in each system are
the following information:
not exact equivalents; therefore, each system shall be used
4.1.1 Quantity of each size,
independently of the other. Combining values from the two
4.1.2 Conductorsize:circular-milareaorAWG(seeSection
systems may result in nonconformance with the specification.
7),
1.2.1 For density, resistivity, and temperature, the values
4.1.3 Class: SIW compressed (see 1.2 and Table 1),
stated in SI units are to be regarded as standard.
4.1.4 Temper (see 5.3),
4.1.5 Whether coated or uncoated; if coated (see 5.1 and
2. Referenced Documents
5.2).
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2.1 ASTM Standards:
4.1.6 Details of special-purpose lays, if required (see 7.3).
B1 Specification for Hard-Drawn Copper Wire
4.1.7 Whenphysicaltestsshallbemade(see10.2and10.3).
B2 Specification for Medium-Hard-Drawn Copper Wire
4.1.8 Package size (see 16.1).
B3 Specification for Soft or Annealed Copper Wire
4.1.9 Lagging, if required (see 16.2).
B33 Specification forTinned Soft orAnnealed CopperWire
4.1.10 Special package marking, if required (see Section
for Electrical Purposes
16.3), and
B189 Specification for Lead-Coated and Lead-Alloy-
4.1.11 Place of inspection (see Section 15).
Coated Soft Copper Wire for Electrical Purposes
5. Requirements for Wires
B193 Test Method for Resistivity of Electrical Conductor
Materials
5.1 The purchaser shall designate the type of wire and the
B246 Specification for Tinned Hard-Drawn and Medium-
kind of coating, if any, to be used in the conductor.
Hard-Drawn Copper Wire for Electrical Purposes
5.2 Before stranding, the copper wire used shall meet all of
B263 Test Method for Determination of Cross-Sectional
the requirements of the following specifications ofASTM that
are applicable to its type:
5.2.1 Specification B3,
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This specification is under the jurisdiction of ASTM Committee B01 of
5.2.2 Specification B33,
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
5.2.3 Specification B2,
Conductors of Copper and Copper Alloys.
Current edition approved Sept. 1, 2004. Published September 2004. Orignally 5.2.4 Specification B1,
approved in 2000. Last previous edition approved in 2004 as B902 – 04. DOI:
5.2.5 Specification B189, and
10.1520/B0902-04A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from NationalTechnical Information Service, 5285 Port Royal Road,
the ASTM website. Springfield, VA 22161.
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B902 – 04a
TABLE 1 Construction Requirements of Compressed Round SIW Standard Copper Conductors
Compressed Strand Dimensions
Conductor Size Nominal Nominal
Diameter Diameter
of SIW of SIW
Minimum Compressed Compressed
Number of Conductor, Conductor, Mass DC Resistance at 20°C
2
cmils AWG mm Wires in. mm. lb/1000ft kg/km V/1000ft V/km
5 000 000 2534 217 2.424 61.57 15890 23649 0.00218 0.00715
4 500 000 2280 217 2.300 58.41 14300 21283 0.00242 0.00794
4 000 000
...