MIL-DTL-27500H
AMERICAN NATIONAL STANDARD
ANSI/ASQC Z 1.4 - Sampling Procedures and Tables for Inspection by Attributes
(Application for copies should be addressed to American Society for Quality Control, ASQC, 611 East
Wisconsin Avenue, Milwaukee, Wisconsin 53202)
NATIONAL INSTITUTE FOR STANDARDS AND TECHNOLOGY (NIST)
NBS HDBK 100 - International Annealed Copper Standard (IACS)
(Application for copies should be addressed to National Institute for Standards and Technology, Administration
Building 101 (Publications Office) Gaithersburg, MD 20879
(Non-Government standards and other publications are normally available from the organizations which prepare or which
distribute the documents. These documents also may be available in or through libraries or other informational services.)
2.4 Order of precedence. In the event of a conflict between this specification and the references cited herein (except for
associated detail specifications, specification sheets or MS standards), the text of this specification will take precedence. Nothing in
this specification, however, will supersede applicable laws or regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Materials.
3.1.1 Copper shield round strand material. Before shielding, the copper strands used in the shields shall be annealed or soft-
drawn copper wire from commercially pure copper and shall conform to ASTM B 3.
3.1.2 Stainless steel shield material. Before shielding, the stainless steel strands shall conform to ASTM A 313, form I, (or form
II as applicable) composition 302 or 304, condition A.
3.1.3 High-strength copper alloy shield round strands. Before shielding, the high strength copper alloy strands shall conform to
ASTM B 624 except the minimum tensile strength shall be 55,000 lbf/in2, the minimum elongation shall be 6 percent, and the
conductivity shall be 80 percent (minimum) as stated in NBS Handbook 100.
3.2 Construction. Construction shall comply with the classification given in 1.2. Recommend combinations of shield style,
basic wire specification and jacket materials are shown in table II.
3.3 Basic wire. Wire used in the construction of the cable shall be qualified to the basic wire specification (see table I) before
cabling. The producer of the finished cable shall be a qualified source under the applicable basic wire specification, or shall be
responsible that qualified wire from a qualified source was used in the construction of the cable and be required to furnish on request
a test report from the manufacturer of the basic wire, plus a letter certifying that the component wire meets all the individual
component wire specification requirements from the builder of the cable. Color added to the insulation (such as a helical stripe or
circumferential band) for the purpose of wire number identification shall not degrade the insulation as evidenced by failure to meet
the requirements herein. Unless otherwise specified (see 6.2), the manufacturer of cable is responsible for assuring that the basic
wire meets the wire specification requirements prior to being fabricated into cable.
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