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This specification deals with bare fine-wire bunch-stranded and rope-lay bunch-stranded copper conductors made from round copper wires finer than No. 40 AWG, either coated or uncoated with tin or silver, for use as electrical conductors. The conductor types covered in this specification are designated Type B for bunch-stranded conductors, and Type R for rope-lay bunch-stranded conductors. On the other hand, the wire classifications are assigned as: Class R, stranded conductors using wire 42 AWG; Class S, stranded conductors using wire 44 AWG; Class T, stranded conductors using wire 46 AWG; Class U, stranded conductors using wire 48 AWG; and Class V, stranded conductors using wire 50 AWG. Wires shall undergo tests that shall evaluated their conformance to physical and electrical properties such as wire cross-sectional area and diameter, coating thickness, tensile strength, elongation, and DC resistance.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers bare bunch-stranded and rope-lay bunch-stranded conductors made from round copper wires finer than No. 40 AWG with diameters less than 0.0031 in. (.078 mm), either coated or uncoated with tin or silver, for use as electrical conductors. (Explanatory Note 1).
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B33 Specification for Tin-Coated Soft or Annealed Copper Wire for Electrical Purposes
B49 Specification for Copper Rod Drawing Stock for Electrical Purposes
B172 Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors
B174 Specification for Bunch-Stranded Copper Conductors for Electrical Conductors
B193 Test Method for Resistivity of Electrical Conductor Materials
B258 Specification for Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors
B298 Specification for Silver-Coated Soft or Annealed Copper Wire
B354 Terminology Relating to Uninsulated Metallic Electrical Conductors
ICS Number Code 29.050 (Superconductivity and conducting materials)
UNSPSC Code 26121517(Copper wire)
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ASTM B738-13, Standard Specification for Fine-Wire Bunch-Stranded and Rope-Lay Bunch-Stranded Copper Conductors for Use as Electrical Conductors, ASTM International, West Conshohocken, PA, 2013, www.astm.orgBack to Top