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This specification covers nickel-coated, soft or annealed, round copper wire for use in electrical equipment. Five classes of wire are covered as follows: Class 2, Class 4, Class 7, Class 10, and Class 27. Properties like elongation, resistivity and dimensions of the wire shall be determined. The continuity of the coating shall be determined by the sodium polysulfide test. Adherence of the coating shall be determined by wrapping and immersion tests.
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 nickel-coated, soft or annealed, round copper wire for use in electrical equipment.
1.2 Five classes of wire are covered as follows:
1.2.1 Class 2—Wire whose nickel coating is at least 2 % of the total weight of the coated wire.
1.2.2 Class 4—Wire whose nickel coating is at least 4 % of the total weight of the coated wire.
1.2.3 Class 7—Wire whose nickel coating is at least 7 % of the total weight of the coated wire.
1.2.4 Class 10—Wire whose nickel coating is at least 10 % of the total weight of the coated wire.
1.2.5 Class 27—Wire whose nickel coating is at least 27 % of the total weight of the coated wire.
Note 1—For information purposes, the thickness of coating in microinches provided by the percentages listed in 1.2 is shown in Table 1.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parenthesis are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3.1 Exceptions—The SI values for density, resistivity, and volume are to be regarded as standard.
1.4 This hazard statement applies only to Section 6, Test Methods, and to the Appendix of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B49 Specification for Copper Rod Drawing Stock for Electrical Purposes
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
E75 Test Methods for Chemical Analysis of Copper-Nickel and Copper-Nickel-Zinc Alloys
NISTNBS Handbook 100--Copper Wire Tables Available from National Technical Information Service (NTIS), 5301 Shawnee Rd., Alexandria, VA 22312, http://www.ntis.gov.
ICS Number Code 77.150.30 (Copper products)
UNSPSC Code 26121517(Copper wire)
ASTM B355-11, Standard Specification for Nickel-Coated Soft or Annealed Copper Wire, ASTM International, West Conshohocken, PA, 2011, www.astm.orgBack to Top