ASTM B263/B263M-14
(Test Method)Standard Test Method for Determination of Cross-Sectional Area of Stranded Conductors
Standard Test Method for Determination of Cross-Sectional Area of Stranded Conductors
ABSTRACT
This test method covers the standard procedure for determining the cross-sectional area of stranded conductors by the mass method. The apparatus shall consist of a balance for mass measurement, a steel scale for length measurement, and a jig or equivalent equipment for cutting the conductor to length and at right angles to its axis. Cross-sectional area of stranded conductors such as those with only one type of conducting material, cored annular conductors and steel-reinforced aluminum conductors, composite copper and copper-covered steel conductors, and composite aluminum 1350 and aluminum alloy 6201 conductor shall be calculated.
SCOPE
1.1 This test method covers the procedure for determining the cross-sectional area of stranded conductors by the mass method.
1.2 The values stated in inch-pound or SI units are to be regarded separately as the standard. The values in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
1.3 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.
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Designation: B263/B263M − 14
Standard Test Method for
Determination of Cross-Sectional Area of Stranded
1
Conductors
This standard is issued under the fixed designation B263/B263M; 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 U.S. Department of Defense.
1. Scope 3.1.3 specimen, n—a specimen is a length of stranded
conductor removed for test purposes from any individual
1.1 This test method covers the procedure for determining
production unit of the sample.
the cross-sectional area of stranded conductors by the mass
method.
4. Apparatus
1.2 The values stated in inch-pound or SI units are to be
4.1 Balance, for measurement of mass, accurate to 0.1 %.
regarded separately as the standard. The values in each system
4.2 Steel Scale, for measurement of length, with smallest
are not exact equivalents; therefore, each system shall be used
1
divisions not greater than ⁄32 in. [1 mm].
independently of the other. Combining values from the two
4.3 Jig, or equivalent equipment, for cutting the conductor
systems may result in nonconformance with the specification.
to length and at right angles to its axis.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Sampling
responsibility of the user of this standard to establish appro-
5.1 Samples shall be taken from the outer end of reel or
priate safety and health practices and determine the applica-
spool lengths, or from either end of coiled lengths.
bility of regulatory limitations prior to use.
5.2 Unless otherwise specified by the purchaser at the time
2. Referenced Documents of placing the order, a sample shall consist of the number of
production units (reels or coils) shown in Table 1 or in
2.1 The following documents form a part of this test method
accordance with Specification B830.
to the extent referenced herein.
2
6. Test Specimens
2.2 ASTM Standards:
B830 Specification for Uniform Test Methods and Fre-
6.1 The length of test specimens shall be as follows:
quency
Nominal Size of Test Specimen, Length of Test Specimen min,
2
cmil [mm ] ft [mm]
3. Terminology
Up to 17 000 [9], incl 4 [1220]
3.1 Definitions of Terms Specific to This Standard:
Over 17 000 [9] 2 [610]
3.1.1 lot, n—a lot is any amount of stranded conductor of
7. Procedure
one type and size presented for acceptance at one time.
7.1 Cut the test specimen, making sure that the ends are at
3.1.2 sample, n—a sample is a quantity of production units
the right angles to the axis of the conductor.
(reels, spools, coils, and so forth) selected at random from the
7.2 Measure the length of the specimen at room temperature
lot for the purpose of determining conformance of the lot to the
1
(see Note) to the nearest ⁄32 in. [1 mm], and measure the mass
requirements of this test method.
to within 60.1 %, converting to pounds [grams] if weighed in
other units.
1
This test method is under the jurisdiction of ASTM Committee B01 on
NOTE 1—Correction for temperature variation need not be made, since
Electrical Conductors and is the direct responsibility of Subcommittee B01.02 on
the error introduced in the length measurement by the temperature
Methods of Test and Sampling Procedure.
Current edition approved April 1, 2014. Published April 2014. Originally variation is less than the required accuracy of the length measurement.
approved in 1956. Last previous edition approved in 2010 as B263/B263M – 04
ε1
8. Calculation
(2010) . DOI: 10.1520/B0263_B0263M-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
8.1 Calculate the cross-sectional area of a stranded
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
conductor, composed of only one type of conducting material,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. as follows:
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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B263/B263M − 14
TABLE 1 Number of Production Units Required per Sample
k = increment (increase) in mass and electrical resistance
Number of Production Units in
of the conducting material (from product
Sample
specifications), %.
For first For each additional
Nominal Conductor Size,
2
100 000 ft 100 000 ft 8.3 Calculate the cross-sectional area (expressed as the
cmil [mm ]
A A
[30 000 m] [30 000 m]
hard-drawn copper equivalent) of composite copper and
or or
fraction thereof fraction thereof copper-covered ste
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: B263/B263M − 04 (Reapproved 2010) B263/B263M − 14
Standard Test Method for
Determination of Cross-Sectional Area of Stranded
1
Conductors
This standard is issued under the fixed designation B263/B263M; 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 U.S. Department of Defense.
1
ε NOTE—Designation was corrected editorially in October 2013.
1. Scope
1.1 This test method covers the procedure for determining the cross-sectional area of stranded conductors by the mass method.
1.2 The values stated in inch-pound or SI units are to be regarded separately as the standard. The values in each system are not
exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may
result in nonconformance with the specification.
1.3 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
2.1 The following documents form a part of this test method to the extent referenced herein.
2
2.2 ASTM Standards:
B830 Specification for Uniform Test Methods and Frequency
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 lot, n—a lot is any amount of stranded conductor of one type and size presented for acceptance at one time.
3.1.2 sample, n—a sample is a quantity of production units (reels, spools, coils, and so forth) selected at random from the lot
for the purpose of determining conformance of the lot to the requirements of this test method.
3.1.3 specimen, n—a specimen is a length of stranded conductor removed for test purposes from any individual production unit
of the sample.
4. Apparatus
4.1 Balance, for measurement of mass, accurate to 0.1 %.
1
4.2 Steel Scale, for measurement of length, with smallest divisions not greater than ⁄32 in. [1 mm].
4.3 Jig, or equivalent equipment, for cutting the conductor to length and at right angles to its axis.
5. Sampling
5.1 Samples shall be taken from the outer end of reel or spool lengths, or from either end of coiled lengths.
5.2 Unless otherwise specified by the purchaser at the time of placing the order, a sample shall consist of the number of
production units (reels or coils) shown in Table 1 or in accordance with Specification B830.
1
This test method is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.02 on Methods of
Test and Sampling Procedure.
Current edition approved Oct. 1, 2010April 1, 2014. Published December 2010April 2014. Originally approved in 1956. Last previous edition approved in 20042010 as
ε1
B263 – 04.B263/B263M – 04 (2010) . DOI: 10.1520/B0263_B0263M-04R10E01.10.1520/B0263_B0263M-14.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
B263/B263M − 14
TABLE 1 Number of Production Units Required per Sample
Number of Production Units in
Sample
For Each
For Firstfirst
Nominal Conductor Size,
Additionaleach
2
100 000 ft
cmil [mm ]
additional 100 000 ft
A
[30 000 m]
A
[30 000 m]
or
or
fraction thereof
fraction thereof
Up to 83 690 [50] incl 1 1
B
Over 83 690 to 211 600 [50 to 110], incl 2 1
B
Over 211 600 to 500 000 [110 to 260], incl 3 1
B
Over 500 000 [260] 4 1
A
Not more than one specimen per production unit shall be taken if the length in
any one unit exceeds 100 000 ft [30 000 m].
B
If the number of units in the shipment is less than that indicated, one specimen
shall be taken from each unit.
TABLE 2 Mass Factors, f
Mass Factor, f,
Metal lb/cmil·1000 ft
3
[g/cm ]
Copper—bare, tinned, lead-coated, or lead alloy-coated 0.0030270 [8.890]
Aluminum 1350 0.0009189 [2.705]
Aluminum alloy 6201 0.0009142 [2.690]
Aluminum alloys, 8000 series 0.0009236 [2.710]
Copper-cla
...
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