ASTM B835-00

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Designation: B 835 – 00
Standard Specification for
Compact Round Stranded Copper Conductors Using Single
Input Wire Construction
This standard is issued under the fixed designation B 835; 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 4. Ordering Information
1.1 This specification covers bare compact round stranded 4.1 Orders for material in accordance with this specification
conductors made from uncoated copper wires of a single input shall include the following information:
wire (SIW) diameter for general use in covered or insulated 4.1.1 Quantity of each size (Table 1);
electrical wires or cables. These conductors shall be con- 4.1.2 Conductor size, circular-mil area or AWG (Section 8);
structed with one or more layers of helically laid compacted 4.1.3 Packaging (Section 15), if required;
wires (Explanatory Note 1, Note 2, and Note 3). 4.1.4 Special package marking; and
1.2 The values stated in inch-pound or SI units are to be 4.1.5 Place of inspection (Section 14).
regarded separately as standard. The values in each system are
5. Requirements for Wires
not exact equivalents; therefore, each system shall be used
5.1 Before stranding and compacting, the copper wire shall
independently of the other. Combining values from the two
systems may result in nonconformance with the specification. meet all of the requirements of Specification B 3.
1.2.1 For density, resistivity and temperature, the values
6. Joints
stated in SI units are to be regarded as standard.
6.1 Welds and brazes may be made in rods or in wires prior
2. Referenced Documents
to final drawing.
2.1 The following documents of the issue in effect on date 6.2 Welds and brazes may be made in the individual wires
for compact conductors, but they shall not be closer together
of material purchase form a part of this specification to the
extent referenced herein. than 1 ft (0.3 m) for conductor of 19 wires or less or closer than
2.2 ASTM Standards: 1 ft (0.3 m) in a layer for conductor of more than 19 wires.
6.3 No joint or splice shall be made in a compact-stranded
B 3 Specification for Soft or Annealed Copper Wire
B 263 Test Method for Determination of Cross-Sectional conductor as a whole.
Area of Stranded Conductors
7. Lay
B 354 Terminology Relating to Uninsulated Metallic Elec-
7.1 The length of lay shall not be less than 8 or more than
trical Conductors
16 times the outside diameter of the completed conductor.
2.3 NIST Document:
7.2 The direction of lay of the outer layer shall be left-hand,
NBS Handbook 100—Copper Wire Tables
and it may be reversed or unidirectional in successive layers.
3. Classification
7.3 Other lay requirements may be furnished upon special
agreement between the manufacturer and the purchaser.
3.1 The conductors described in this specification are in-
tended for subsequent insulation or covering. The classification
8. Construction
of these conductors is SIW compact.
8.1 The construction of the compact round SIW stranded
conductors shall be as given in Table 1.
This specification is under the jurisdiction of ASTM Committee B-1 on
8.2 Wires used in the fabrication of the compact round
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
conductor shall be of such dimensions as to produce a finished
Conductors of Copper and Copper Alloys.
conductor as prescribed in Table 1.
Current edition approved April 10, 2000. Published June 2000. Originally
published as B 835 – 93. Last previous edition B 835 – 93.
Annual Book of ASTM Standards, Vol 02.03.
Available from National Institute of Standards and Technology (NIST),
Gaithersburg, MD 20899.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 835
TABLE 1 Construction Requirements of Compact Round SIW-Stranded Copper Conductors
Conductor Size Compact Conductor Diameter d-c Resistance at 20°C
Minimum Mass/1000 ft, Mass/km,
Number of Wires lb/1000 ft kg/km
Circular, mils AWG mm in. mm V/1000 ft V/km
1 000 000 . 507 53 1.060 26.9 3086 4590 0.0106 0.0347
900 000 . 456 53 0.999 25.4 2780 4140 0.0118 0.0386
800 000 . 405 53 0.938 23.8 2469 3680 0.0132 0.0433
750 000 . 380 53 0.908 23.0 2316 3450 0.0141 0.0462
700 000 . 355 34 0.877 22.3 2160 3220 0.0151 0.0495
650 000 . 329 34 0.845 21.4 2006 2990 0.0163 0.0535
600 000 . 304 34 0.813 20.6 1850 2760 0.0176 0.0577
550 000 . 279 34 0.775 19.7 1700 2530 0.0192 0.0630
500 000 . 253 30 0.736 18.7 1542 2300 0.0212 0.0695
450 000 . 228 30 0.700 17.8 1390 2070 0.0235 0.0770
400 000 . 203 24 0.659 16.7 1236 1840 0.0264 0.0865
350 000 . 177 24 0.616 15.7 1080 1610 0.0302 0.0990
300 000 . 152 18 0.570 14.5 925 1380 0.0353 0.116
250 000 . 127 18 0.520 13.2 772 1150 0.0423 0.139
211 600 4/0 107 17 0.475 12.1 653 972 0.0500 0.164
167 800 3/0 85.0 15 0.423 10.8 518 771 0.0630 0.206
133 100 2/0 67.4 12 0.376 9.57 411 611 0.0795 0.261
105 600 1/0 53.5 7 0.336 8.55 326 485 0.100 0.328
83 690 1 42.4 7 0.299 7.60 259 385 0.126 0.413
66 350 2 33.6 6 0.268 6.81 205 305 0.159 0.521
41 740 4 21.2 6 0.213 5.41 129 192 0.253 0.830
26 240 6 13.3 6 0.169 4.29 80.9 121 0.403 1.32
16 510 8 8.37 6 0.134 3.40 51.0 75.9 0.641 2.10
9. Density 9.4 For conductors to be used in covered or insulated wires
or cables, dc resistance measurement may be used instead of
9.1 For the purpose of calculating mass per unit length,
the method outlined in Section 10, to determine compliance
cross sections, and so forth, the density of the copper shall be
3 3
with this specification; however, the referee method shall be
taken as 8.89 g/cm (0.32117 lb/in. ) at 20°C.
that outlined in Section 10.
9.2 The mass and electrical resistance of a unit length of
stranded unsealed conductor are a function of the length of lay.
10. Variation in Area
The approximate mass and electrical resistance may be deter-
10.1 The cross-sectional area of the compact round conduc-
mined using the standard increments shown in Table 2. When
tor shall not be less than 98 % of the cross-sectional area as
greater accuracy is desired, the
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