ASTM B263/B263M-04(2010)e1
(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
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 − 04(Reapproved 2010)
Standard Test Method for
Determination of Cross-Sectional Area of Stranded
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 Department of Defense.
ε NOTE—Designation was corrected editorially in October 2013.
1. Scope lot for the purpose of determining conformance of the lot to the
requirements of this test method.
1.1 This test method covers the procedure for determining
3.1.3 specimen, n—a specimen is a length of stranded
the cross-sectional area of stranded conductors by the mass
conductor removed for test purposes from any individual
method.
production unit of the sample.
1.2 The values stated in inch-pound or SI units are to be
regarded separately as the standard. The values in each system
4. Apparatus
are not exact equivalents; therefore, each system shall be used
4.1 Balance, for measurement of mass, accurate to 0.1 %.
independently of the other. Combining values from the two
systems may result in nonconformance with the specification.
4.2 Steel Scale, for measurement of length, with smallest
divisions not greater than ⁄32 in. [1 mm].
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.3 Jig, or equivalent equipment, for cutting the conductor
responsibility of the user of this standard to establish appro-
to length and at right angles to its axis.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Sampling
5.1 Samples shall be taken from the outer end of reel or
2. Referenced Documents
spool lengths, or from either end of coiled lengths.
2.1 The following documents form a part of this test method
5.2 Unless otherwise specified by the purchaser at the time
to the extent referenced herein.
of placing the order, a sample shall consist of the number of
2.2 ASTM Standards:
production units (reels or coils) shown in Table 1 or in
B830 Specification for Uniform Test Methods and Fre-
accordance with Specification B830.
quency
6. Test Specimens
3. Terminology
6.1 The length of test specimens shall be as follows:
3.1 Definitions of Terms Specific to This Standard:
Nominal Size of Test Specimen, Length of Test Specimen min,
3.1.1 lot, n—a lot is any amount of stranded conductor of
cmil [mm ] ft [mm]
Up to 17 000 [9], incl 4 [1220]
one type and size presented for acceptance at one time.
Over 17 000 [9] 2 [610]
3.1.2 sample, n—a sample is a quantity of production units
(reels, spools, coils, and so forth) selected at random from the
7. Procedure
7.1 Cut the test specimen, making sure that the ends are at
the right angles to the axis of the conductor.
This test method is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.02 on
7.2 Measure the length of the specimen at room temperature
Methods of Test and Sampling Procedure.
(see Note) to the nearest ⁄32 in. [1 mm], and measure the mass
Current edition approved Oct. 1, 2010. Published December 2010. Originally
to within 60.1 %, converting to pounds [grams] if weighed in
approved in 1956. Last previous edition approved in 2004 as B263 – 04. DOI:
10.1520/B0263_B0263M-04R10E01.
other units.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
NOTE 1—Correction for temperature variation need not be made, since
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 error introduced in the length measurement by the temperature
the ASTM website. variation is less than the required accuracy of the length measurement.
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B263/B263M − 04 (2010)
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, cmil [mm ]
100 000 ft 100 000 ft
8.3 Calculate the cross-sectional area (expressed as the
A A
[30 000 m] or [30 000 m] or
hard-drawn copper equivalent) of composite copper and
fraction thereof fraction thereof
copper-covered steel conductors, as follows:
Up to 83 690 [50] incl 1 1
B
Over 83 690 to 211 600 [50 to 110], incl 2 1
A 5 1000/L
...
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