ASTM B286-07

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:B286 −07
StandardSpecification for
Copper Conductors for Use in Hookup Wire for Electronic
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Equipment
This standard is issued under the fixed designation B286; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.1.2 Conductor size, designation, construction, and type
(Table 1).
1.1 This specification covers uninsulated metallic-coated
3.1.3 Whether tin, lead alloy, silver-coated, or nickel-coated
copper conductors for use in hookup wire for electronic
(see 4.1).
equipment.
3.1.4 For silver-coated conductors and nickel-coated
1.2 The SI values for density are to be regarded as standard.
conductors, class of coating (see 4.1), and when required,
For all other properties, the inch-pound values are to be
unannealed (see 4.2),
regarded as the standard.
3.1.5 Desired constructions where alternates are given
(Table 1, Type II and, 5.1, 6.1, and 6.2),
2. Referenced Documents
3.1.6 Package size (Section 12).
2.1 The following documents of the issue in effect on date
3.1.7 Special package marking if required (Section 11), and
of material purchase form a part of this specification to the
3.1.8 Place of inspection (Section 10).
extent referenced herein:
4. General Requirements
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2.2 ASTM Standards:
4.1 Coating of Wires—The coating of the solid conductors
B33 Specification for Tin-Coated Soft or Annealed Copper
and the wires composing stranded conductors (before strand-
Wire for Electrical Purposes
ing) shall conform to the coating requirements of ASTM
B189 Specification for Lead-Coated and Lead-Alloy-Coated
Specifications B33, B189, B298, and B355, as indicated on the
Soft Copper Wire for Electrical Purposes
purchase order.
B193 Test Method for Resistivity of Electrical Conductor
Materials
4.2 Temper—Unless otherwise specified, all coated conduc-
B258 Specification for Nominal Diameters and Cross-
tors shall be furnished in the annealed temper. When so
SectionalAreasofAWGSizesofSolidRoundWiresUsed
specified, silver-coated conductors or nickel-coated conductors
as Electrical Conductors
shall be furnished unannealed (Explanatory Note 1).
B298 Specification for Silver-Coated Soft orAnnealed Cop-
NOTE 1—The term unannealed as used in this specification means
per Wire
cold-worked conductor as produced on commercial wire-drawing ma-
B355 SpecificationforNickel-CoatedSoftorAnnealedCop-
chines.
per Wire
4.3 Elongation—The elongation of annealedType I conduc-
tors shall be as specified in Specifications B33, B189, B298,
3. Ordering Information
and B355 as applicable.The elongation of stranded conductors
3.1 Orders for material under this specification shall include
shall be permitted to vary from the requirements of the
the following information:
applicable Specifications: B33, B189, B298, and B355 by the
3.1.1 Quantity of each size, designation (Table 1) and type,
following amounts:
4.3.1 For stranded conductors 22AWG and smaller, the test
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This specification is under the jurisdiction of ASTM Committee B01 on
shall be performed on the whole conductor and the elongation
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
measured when the first strand of the conductor breaks. The
Conductors of Copper and Copper Alloys.
minimum average elongation shall not be less than 10 % with
Current edition approved Oct. 1, 2007. Published October 2007. Originally
no individual specimen less than 5 %.
approved in 1954. Last previous edition approved in 2002 as B286 – 02. DOI:
10.1520/B0286-07.
4.3.2 For stranded conductors larger than 22 AWG, strands
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
shall be carefully removed from the conductor and tested for
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
elongation. The minimum average elongation shall not be less
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. than 10 % with no individual strand less than 5 %.
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B286−07
4.4 D-C Resistance—The d-c resistance in ohms per 1000 ft beperformedonTypeIconductorsbeforeinsulatingandonthe
of annealed solid and stranded conductor shall not exceed, individual wires of Type II conductors before stranding.
before insulating, the appropriate values prescribed in Table 1
8.2 Tests to determine conformance to the elongation re-
(Explanatory Note 2).
quirements presc
...