ASTM B47-95a

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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 47 – 95a
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
1
Copper Trolley Wire
This standard is issued under the fixed designation B 47; 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.
TABLE 1 Tensile Requirements (See Explanatory Note 2)
1. Scope
Tensile Strength, min. psi
1.1 This specification covers round and grooved hard-drawn
Elongation
Diameter, Area,
25 troy oz.
copper and silver-bearing copper trolley wire.
in 10 in.,
No silver
in. cmils
min./short
min, %
added
1.2 The values stated in inch-pound units are to be regarded
ton added
as the standard. The values given in parentheses are for
0.5477 300 000 46 400 48 500 4.50
information only.
0.4600 211 600 49 000 51 500 3.75
0.4096 167 800 51 000 53 000 3.25
2. Referenced Documents
0.3648 133 100 52 800 54 000 2.80
0.3249 105 600 54 500 55 000 2.40
2.1 ASTM Standards:
B 49 Specification for Copper Redraw Rod for Electrical
2
Purposes
as may be agreed upon between the manufacturer and the
B 193 Test Method for Resistivity of Electrical Conductor
purchaser, and that will conform to the requirements prescribed
3
Materials
in this specification may also be used.
4.3 Either oxygen-free or tough pitch copper may be sup-
3. Ordering Information
plied. Tests for oxygen content of the copper are not a
3.1 Orders for material under this specification shall include
requirement of this specification.
the following information:
3.1.1 Quantity of each size and section, ROUND WIRE
3.1.2 Wire size: diameter in inches (see 6.1 and Table 1) or
5. Tensile Properties
area in circular mils (see 10.1 and Fig. 1),
3.1.3 Shape of section (Section 1), 5.1 Round wire shall conform to the requirements as to
3.1.4 Type of copper, if the addition of silver of 25 troy
tensile properties specified in Table 1.
oz./short ton minimum, is required (see Section 4 and Explana- 5.2 Tests on a specimen of round wire containing a joint
tory Note 1),
shall show at least 95 % of the tensile strength specified in
3.1.5 Package size (see 18.3), Table 1. Elongation tests shall not be made on specimens
3.1.6 Lagging, if required (see 18.1),
containing joints.
3.1.7 Relation between vertical axis of grooved wire and 5.3 Tension tests shall be made on representative samples.
axis of reel (see 18.1),
The elongation shall be determined as the permanent increase
3.1.8 Size of arbor hole, if special (see 18.2), in length, due to the breaking of the wire in tension, measured
3.1.9 Special package marking, if required (see 18.4), and
between gage marks placed originally 10 in. apart upon the test
3.1.10 Place of inspection (Section 16). specimen (Explanatory Note 2). The fracture shall be between
the gage marks and not closer than 1 in. to either gage mark.
4. Materials and Manufacture
6. Dimensions and Permissible Variations
4.1 The material shall be copper of such quality and purity
that the finished product shall have the properties and charac-
6.1 The size of round trolley wire shall be expressed as the
teristics prescribed in this specification.
diameter of the wire in decimal fractions of an inch, to the
nearest 0.1 mil (0.0001 in.).
NOTE 1—Specification B 49 defines the materials suitable for use.
6.2 Wire shall be truly cylindrical in form. The diameter
4.2 Copper redraw rod of special qualities, forms, or types,
shall not vary more than plus and minus 1 % from that
specified.
1
This specification is under the jurisdiction of ASTM Committee B-1 on
7. Twist Test
Electrical Conductors and is the direct responsibility of B01.04 on Conductors of
Copper and Copper Alloys.
7.1 For the purpose of determining and developing defects
Current edition approved Sept. 10, 1995. Published November 1995. Originally
which may be prejudicial to the life of trolley wire, owing to its
issued 1923 to replace portions of B 1. Last previous edition B 47 – 95.
2
peculiar service as compared to that of wire for other purposes,
Annual Book of ASTM Standards, Vol 02.01.
3
Annual Book of ASTM Standards, Vol 02.03. round wire shall be subjected to the twist test described in 7.2.
1

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B47
Nominal size, cmils 133 100 167 800 211 600 300 000 350 000
2
Area, in. (Explanatory Note 6) 0 .1083 0 .1314 0 .1665 0 .2355 0 .2758
Area, cmils (Explanatory Note 6) 137 900 167 300 212 000 299 800 351 200
Weight, lb/mile (Explanatory Note 6) 2205 2674 3389 4792 5612
Dimensions for Inspection, in.
A 0.388 + 0.006 0.429 + 0.006 0.482 + 0.006 0
...