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ASTM B263.pdf
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Designation: B 263 – 04
Standard Test Method for
Determination of Cross-Sectional Area of Stranded
Conductors
1
This standard is issued under the fixed designation B 263; 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.
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 appro-
priate safety and health practices and determine the applica-
bility 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 ASTM Standards:
2
B 830 Specification for Uniform Test Methods and Fre-
quency
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 %.
4.2 Steel Scale, for measurement of length, with smallest
divisions not greater than
1
⁄
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 B 830.
6. Test Specimens
6.1 The length of test specimens shall be as follows:
Nominal Size of Test Specimen,
cmil (mm
2
)
Length of Test Specimen min,
ft (mm)
Up to 17 000 (9), incl
Over 17 000 (9)
4 (1220)
2 (610)
7. Procedure
7.1 Cut the test specimen, making sure that the ends are at
the right angles to the axis of the conductor.
7.2 Measure the length of the specimen at room temperature
(see Note) to the nearest
1
⁄
32
in. (1 mm), and measure the mass
to within 60.1 %, converting to pounds (grams) if weighed in
other units.
NOTE 1—Correction for temperature variation need not be made, since
the error introduced in the length measurement by the temperature
variation is less than the required accuracy of the length measurement.
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 April 1, 2004. Published May 2004. Originally
approved in 1956. Last previous edition approved in 1999 as B 263 – 99.
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.
1
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
Copyright ASTM International
Reproduced by IHS under license with ASTM
Not for Resale
No reproduction or networking permitted without license from IHS
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