ASTM B258-02

Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors

ABSTRACT
This specification prescribes the standard nominal diameters and cross-sectional areas of American Wire Gage (AWG) sizes of solid round wires, used as electrical conductors, and gives equations and rules for the calculation of standard nominal mass and lengths, resistances, and breaking or rated strengths of such wires. All wire dimensions and properties shall be considered as occurring at the internationally standardized reference temperature and all calculations shall be rounded in the final value only.
SCOPE
1.1 This specification prescribes standard nominal diameters and cross-sectional areas of American Wire Gage (AWG) sizes of solid round wires, used as electrical conductors, and gives equations and rules for the calculation of standard nominal mass and lengths, resistances, and breaking strengths of such wires (Explanatory Note 1).
1.2 The values stated in inch-pound or SI units are to be regarded separately as standard. Each system shall be used independently of the other. Combining values of the two systems may result in nonconformance with the specification. For conductor sizes designated by AWG or kcmil sizes, the requirements in SI units have been numerically converted from the corresponding values stated or derived, in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in SI units.
1.2.1 For density, resistivity and temperature, the values stated in SI units are to be regarded as standard.

General Information

• Status: Historical
• Publication Date: 09-Apr-2002
• ICS: 29.060.10 - Wires
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.02 - Methods of Test and Sampling Procedure

Relations

• Replaces: ASTM B258-01 - Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors
• Effective Date: 10-Apr-2002
• Replaced By: ASTM B258-02(2008) - Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors
• Effective Date: 01-Sep-2008
• Referred By: ASTM B520-12(2017) - Standard Specification for Tin-Coated, Copper-Clad Steel Wire for Electronic Application
• Effective Date: 10-Apr-2002
• Referred By: ASTM B355-11(2016) - Standard Specification for Nickel-Coated Soft or Annealed Copper Wire
• Effective Date: 10-Apr-2002
• Referred By: ASTM B566-04a(2021) - Standard Specification for Copper-Clad Aluminum Wire
• Effective Date: 10-Apr-2002
• Referred By: ASTM B910/B910M-07(2018) - Standard Specification for Annealed Copper-Clad Steel Wire
• Effective Date: 10-Apr-2002
• Referred By: ASTM B961-13(2019) - Standard Specification for Silver Coated Copper and Copper Alloy Stranded Conductors for Electronic Space Application
• Effective Date: 10-Apr-2002
• Referred By: ASTM B913-21 - Standard Test Method for Evaluation of Crimped Electrical Connections to 16-Gauge and Smaller Diameter Stranded and Solid Conductors
• Effective Date: 10-Apr-2002
• Referred By: ASTM B1001-17 - Standard Specification for Copper Electrode Wire Used for Welding Seams of Steel Cans
• Effective Date: 10-Apr-2002
• Referred By: ASTM B869-07(2018) - Standard Specification for Copper-Clad Steel Electrical Conductor for CATV Drop Wire
• Effective Date: 10-Apr-2002
• Referred By: ASTM B227-15(2019) - Standard Specification for Hard-Drawn Copper-Clad Steel Wire
• Effective Date: 10-Apr-2002
• Referred By: ASTM B189-05(2021) - Standard Specification for Lead-Coated and Lead-Alloy-Coated Soft Copper Wire for Electrical Purposes
• Effective Date: 10-Apr-2002
• Referred By: ASTM B501-10(2019) - Standard Specification for Silver-Coated, Copper-Clad Steel Wire for Electronic Application
• Effective Date: 10-Apr-2002
• Referred By: ASTM B452-22 - Standard Specification for Copper-Clad Steel Wire for Electronic Application
• Effective Date: 10-Apr-2002
• Referred By: ASTM B965-09(2018) - Standard Specification for High Performance Tin-Coated Annealed Copper Wire Intended for Electrical and Electronic Application for Solderability
• Effective Date: 10-Apr-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B 258 – 02
Standard Specification for
Standard Nominal Diameters and Cross-Sectional Areas of
AWG Sizes of Solid Round Wires Used as Electrical
1
Conductors
This standard is issued under the fixed designation B 258; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
4
1. Scope B 9 Specification for Bronze Trolley Wire
B 33 Specification for Tinned Soft or Annealed Copper
1.1 This specification prescribes standard nominal diam-
4
Wire for Electrical Purposes
eters and cross-sectional areas ofAmerican Wire Gage (AWG)
4
B 47 Specification for Copper Trolley Wire
sizes of solid round wires, used as electrical conductors, and
B 105 Specification for Hard-Drawn Copper Alloy Wires
gives equations and rules for the calculation of standard
4
for Electrical Conductors
nominal mass and lengths, resistances, and breaking strengths
B 189 Specification for Lead-Coated and Lead-Alloy-
of such wires (Explanatory Note 1).
4
Coated Soft Copper Wire for Electrical Purposes
1.2 The values stated in inch-pound or SI units are to be
B 193 Test Method for Resistivity of Electrical Conductor
regarded separately as standard. Each system shall be used
Materials
independently of the other. Combining values of the two
B 227 Specification for Hard-Drawn Copper-Clad Steel
systems may result in nonconformance with the specification.
4
Wire
For conductor sizes designated by AWG or kcmil sizes, the
B 230/B 230M Specification forAluminum 1350-H19 Wire
requirements in SI units have been numerically converted from
4
for Electrical Purposes
thecorrespondingvaluesstatedorderived,ininch-poundunits.
B 314 Specification for Aluminum 1350 Wire for Commu-
For conductor sizes designated by SI units only, the require-
5
nication Cable
ments are stated or derived in SI units.
B 396 Specification for Aluminum-Alloy 5005-H19 Wire
1.2.1 For density, resistivity and temperature, the values
4
for Electrical Purposes
stated in SI units are to be regarded as standard.
B 398/B 398M Specification for Aluminum-Alloy 6201-
4
2. Referenced Documents
T81 Wire for Electrical Purposes
B 415 Specification for Hard-Drawn Aluminum-Clad Steel
2.1 ASTM Standards:
4
Wire
A 111 Specification for Zinc-Coated (Galvanized) “Iron”
2
B 609/B 609M Specification for Aluminum 1350 Round
Telephone and Telegraph Line Wire
Wire, Annealed and Intermediate Tempers, for Electrical
A 326 Specification for Zinc-Coated (Galvanized) High
4
3
Purposes
Tensile Steel Telephone and Telegraph Line Wire
4
B 800 Specification for 8000 Series Aluminum Alloy Wire
B 1 Specification for Hard-Drawn Copper Wire
4
for Electrical Purposes—Annealed and Intermediate Tem-
B 2 Specification for Medium-Hard-Drawn Copper Wire
4
4
pers
B 3 Specification for Soft or Annealed Copper Wire
E 29 Practice for Using Significant Digits in Test Data to
6
Determine Conformance with Specifications
1
This specification is under the jurisdiction of ASTM Committee B01 on
F 205 Test Method for Measuring Diameter of FineWire by
Electrical Conductors and is the direct responsibility of Subcommittee B01.02 on
7
Weighing
Methods of Test and Sampling Procedure.
Current edition approved April 10, 2002. Published June 2002. Originally
published as B 258 – 51 T. Last previous edition B 258 – 01.
2 5
Annual Book of ASTM Standards, Vol 01.06. Discontinued, see 1994 Annual Book of ASTM Standards, Vol 02.03.
3 6
Discontinued, see 1990 Annual Book of ASTM Standards, Vol 01.06. Annual Book of ASTM Standards, Vol 14.02.
4 7
Annual Book of ASTM Standards, Vol 02.03. Annual Book of ASTM Standards, Vol 10.04.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B 258–02
3. Standard Reference Temperature the following equations and shall be rounded in accordance
withSection4tothesamenumberofsignificantfiguresasused
3.1 Forthepurposeofthisspecification,allwiredimensions
in expressing the standard diameters, but in no case to less than
and properties shall be considered as occurring at the interna-
three significant figures:
tionally standardized reference temperature of 20°C (68°F).
2
Area, cmil 5 d
4. Standard Rules for Rounding
2 2 24
Area, mm 5 d 3 5.067 3 10
4.1 All calculations for the standard nominal dimensions
and properties of solid round wires shall be rounded in the final
where:
value only, in accordance with rounding method of Practice
d = diameter of the wire in mils as given in Table 1.
E 29.
Standard nominal cross-sectional areas in circular
...