ASTM B47-95a(2001)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 (Reapproved 2001)
Standard Specification for
Copper Trolley Wire
ThisstandardisissuedunderthefixeddesignationB47;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
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 Thisspecificationcoversroundandgroovedhard-drawn
Elongation
Diameter, Area,
25 troy oz.
copper and silver-bearing copper trolley wire.
in 10 in.,
No silver
in. cmils
min./short
min, %
1.2 The values stated in inch-pound units are to be regarded added
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
Purposes
4.2 Copper redraw rod of special qualities, forms, or types,
B 193 Test Method for Resistivity of Electrical Conductor
as may be agreed upon between the manufacturer and the
Materials
purchaser,andthatwillconformtotherequirementsprescribed
in this specification may also be used.
3. Ordering Information
4.3 Either oxygen-free or tough pitch copper may be sup-
3.1 Orders for material under this specification shall include
plied. Tests for oxygen content of the copper are not a
the following information:
requirement of this specification.
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
area in circular mils (see 10.1 and Fig. 1),
5. Tensile Properties
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
4. Materials and Manufacture
the gage marks and not closer than 1 in. to either gage mark.
4.1 The material shall be copper of such quality and purity
6. Dimensions and Permissible Variations
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
NOTE 1—Specification B 49 defines the materials suitable for use.
nearest 0.1 mil (0.0001 in.).
6.2 Wire shall be truly cylindrical in form. The diameter
1 shall not vary more than plus and minus 1 % from that
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of B01.04 on Conductors of specified.
Copper and Copper Alloys.
Current edition approved Sept. 10, 1995. Published November 1995. Originally
7. Twist Test
issued 1923 to replace portions of B 1. Last previous edition B 47 – 95.
7.1 For the purpose of determining and developing defects
Annual Book of ASTM Standards, Vol 02.01.
Annual Book of ASTM Standards, Vol 02.03. whichmaybeprejudicialtothelifeoftrolleywire,owingtoits
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B47
Nominal size, cmils 133 100 167 800 211 600 300 000 350 000
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 0.574 + 0.010 0.620 + 0.010
− 0.012 − 0.012 − 0.012 − 0.020 − 0.020
B 0.392 6 0.007 0.430 6 0.008 0.482 6 0.009 0.574 6 0.011 0.620 6 0.012
C 0.318 6 0.007 0.340 6 0.007 0.376 6 0.007 0.376 6 0.007 0.376 6 0.007
Dimensions for Reference, in.
D—radius 0.196 0.215 0.241 0.287 0.310
E 0.217 + 0.005 0.237 + 0.005 0.267 6 0.010 0.267 6 0.010 0.267 6 0.010
− 0.010 − 0.010
F 0.200 0.220 0.250 0.250 0.250
G 0.031 0.047 0.063 0.127 0.156
H 0.005 0.005 0.005 0.005 0.005
J27 6 2° 27 6 2° 27 6 2° 27 6 2° 27 6 2°
K51 6 2° 51 6 2° 51 6 2° 51 6 2° 51 6 2°
L 78° 78° 78° 78° 78°
M—radius 0.015 + 0.010 0.015 + 0.010 0.015 + 0.010 0.015 + 0.010 0.015 + 0.010
− 0.005 −0.005 − 0.005 − 0.005 − 0.005
NOTE—Dimension H is defined by two center lines, of which the upper is the center line of the radius of the groove and the lower is the center line
of the groove.
FIG. 1 Standard Sections Grooved Trolley Wire
peculiar service as compared to that of wire for other purposes, GROOVED WIRE
round wire shall be subjected to the twist test described in 7.2.
Round wire that does not withstand at least 9 twists without
8. Tensile Properties
breaking shall not be considered satisfactory.
8.1 Grooved wire shall conform to the requirements as to
7.2 Three twist tests shall be made on specimens 10 in. (254
tensile properties specified in Table 2.
mm) in length between the holders of the testing machine. The
8.2 Tests on a specimen of grooved wire containing a joint
twisting machine shall be so constructed that there is a linear
shall show at least 95 % of the tensile strength specified in
motion of the tail stock with respect to the head.The twist shall
Table 2. Elongation tests shall not be made on specimens
be applied not faster than 10 turns/min. All three specimens
containing joints.
shall be twisted to destruction and shall not reveal under test
8.3 The tension and elongation tests for grooved wire shall
any seams, pits, slivers, or surface imperfections of sufficient
be made in the same manner as those on round wire as
magnitude to indicate inherent defects or imperfections in the
described in 5.3.
wire. At the time of fracture, the wire shall twist with
reasonable uniformity.
B47
TABLE 2 Tensile Requirements (See Explanatory Note 2)
10. Dimensions and Permissible Variations
Tensile Strength, min. psi
Nominal Elongation
10.1 The size of grooved trolley wire shall be expressed as
Area, in 10 in.,
No silver 25 troy oz min./
the nominal area of cross section in circular mils, the standard
cmils min, %
added short ton added
sizes being as specified in Fig. 1.
350 000 42 800 44 600 4.50
10.2 The weight in pounds per mile of grooved trolley wire
300 000 44 200 48 000 4.50
211 600 46 600 51 300 3.75 calculated from the weight of a specimen not less than 18 in. in
167 800 48 500 52 700 3.25
length shall not vary more than plus and minus 4 % from that
133 100 50 200 53 000 2.80
specified in Fig. 1.
10.3 Conformance of the trolley wire to the specified
dimensions shall be determined by taking the measurements
9. Sections
showninFig.1undertheheading,“DimensionsforInspection,
9.1 Standard sections of grooved trolley wire shall be those in.” The shape of the groove shall be checked with the
known as the “American Standard Grooved Trolley Wire appropriate “go” and “no-go” slip gages described in Fig. 2.
Sections” (the Standard Design of the American Transit Engi- The gages shall be applied to the ends of the samples taken
neering Association) shown in Fig. 1. from each reel. Samples shall be clean and ends free from
Dimensions of Gage, in. (Except as Indicated)
For Trolley Wire of Nominal Size For Trolley Wire of Nominal Size For Trolley Wire of
Dimension 133 100 cmil 167 800 cmil Nominal Sizes 211 600, 300 000,
and 350 000 cmil
Go No-Go Go No-Go Go No-Go
5 5 5 5 5 5
D ⁄16 ⁄16 ⁄16 ⁄16 ⁄16 ⁄16
10.001 10.001 10.000
E 0.223 6 0.0005 0.207 0.243 6 0.0005 0.227 0.278 6 0.0005 0.257
–0.000 –0.001 –0.000
F 0.212 0.200
...