ASTM B902-13

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Designation:B902 −13
StandardSpecification for
Compressed Round Stranded Copper Conductors, Hard,
1
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 B263 Test Method for Determination of Cross-Sectional
Area of Stranded Conductors
1.1 This specification covers stranded conductors made
B354 Terminology Relating to Uninsulated Metallic Electri-
from round copper wires, either uncoated or coated with tin,
cal Conductors
lead, or lead alloy for general use in insulated conductor
3
2.2 Other Standard:
assemblies for electrical purposes. These conductors shall be
NBS Handbook 100: Copper Wire Tables
composed of one or more roller shaped or die closed layers of
helically laid wires using the single input wire (SIW) method-
3. Classification
ology. (see Note 1 and Explanatory Note 1)
3.1 The conductors described in this specification are in-
NOTE 1—Sealed conductors which are intended to prevent longitudinal
tendedforsubsequentinsulationorcovering.Theclassification
water propagation and are further covered/insulated, are also permitted
of these conductors is SIW compressed.
within the guidelines of this specification.
1.2 The values stated in inch-pound or SI units are to be
4. Ordering Information
regarded separately as standard. The values in each system are
4.1 Orders for material under this specification shall include
not exact equivalents; therefore, each system shall be used
the following information:
independently of the other. Combining values from the two
4.1.1 Quantity of each size,
systems may result in nonconformance with the specification.
4.1.2 Conductorsize:circular-milareaorAWG(seeSection
1.2.1 For density, resistivity, and temperature, the values
7),
stated in SI units are to be regarded as standard.
4.1.3 Class: SIW compressed (see 1.2 and Table 1),
4.1.4 Temper (see 5.3),
2. Referenced Documents
4.1.5 Whether coated or uncoated; if coated (see 5.1 and
2
2.1 ASTM Standards:
5.2).
B1 Specification for Hard-Drawn Copper Wire
4.1.6 Details of special-purpose lays, if required (see 7.3).
B2 Specification for Medium-Hard-Drawn Copper Wire
4.1.7 When physical tests shall be made (see Sections 9 and
B3 Specification for Soft or Annealed Copper Wire
10).
B33 Specification for Tin-Coated Soft or Annealed Copper
4.1.8 Package size (see 16.1).
Wire for Electrical Purposes
4.1.9 Lagging, if required (see 16.2).
B189 Specification for Lead-Coated and Lead-Alloy-Coated
4.1.10 Special package marking, if required (see Section
Soft Copper Wire for Electrical Purposes
16.3), and
B193 Test Method for Resistivity of Electrical Conductor
4.1.11 Place of inspection (see Section 15).
Materials
B246 Specification for Tinned Hard-Drawn and Medium- 5. Requirements for Wires
Hard-Drawn Copper Wire for Electrical Purposes
5.1 The purchaser shall designate the type of wire and the
kind of coating, if any, to be used in the conductor.
1 5.2 Before stranding, the copper wire used shall meet all of
This specification is under the jurisdiction of ASTM Committee B01 of
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on the requirements of the following specifications ofASTM that
Conductors of Copper and Copper Alloys.
are applicable to its type:
Current edition approved Feb. 1, 2013. Published February 2013. Originally
5.2.1 Specification B3,
approved in 2000. Last previous edition approved in 2010 as B902 – 04a (2010).
5.2.2 Specification B33,
DOI: 10.1520/B0902-13.
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 National Technical Information Service (NTIS), 5301 Shawnee
the ASTM website. Rd., Alexandria, VA 22312, http://www.ntis.gov.
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B902−13
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 Ω/1000ft Ω/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 2027 217 2.168 55.07 12590 18738
...