U\)This specification covers 2, 3, and 4 cadmium copper alloy stranded retractile conductor electrical cords. These cords are insulated with a natural rubber compound encased in a Buna S or Buna S and natural rubber compound jacket which is vulcanized in a helical spring coil form to produce a cord which will extend and retract freely. These cords are designed for use on communications equipment at audio frequencies, with a temperature range of -0 to 60 degrees C for continuous operation.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15

MIL-DTL-13273C

2.2 Government documents.

2.2.1 Specifications and standards and handbooks. The following specifications, standards and

handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the

issues of these documents are those cited in the solicitation or contract.

FEDERAL STANDARD

FED-STD-228

Cable and Wire, Insulated; Methods of Testing.

DEPARTMENT OF DEFENSE SPECIFICATION

MIL-DTL-3885

Cable Assemblies and Cord Assemblies, Electrical.

(Copies of these documents are available online at https://assist.daps.dla.mil/quicksearch/ or

from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia,

PA 19111-5094.)

2.3 Non-Government publications. The following documents form a part of this document to the extent

specified herein. Unless otherwise specified, the documents are the issues of the documents cited in the

solicitation or contract (see 6.2).

NCSL INTERNATIONAL

NCSL-Z540.3

Requirements for the Calibration of Measuring and Test

Equipment

(Copies of this document are available from https://www.ncsli.org or from NCSL International, 2995

Wilderness Place, Suite 107, Boulder, CO 80301.)

2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a

conflict between the text of this document and the references cited herein, the text of this document takes

precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a

specific exemption has been obtained.

3. REQUIREMENTS

3.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or

environmentally preferable materials should be used to the maximum extent possible, provided that the

material meets or exceeds the operational and maintenance requirements, and promotes economically

advantageous life cycle costs.

3.2 Materials. Materials shall be as specified herein. When a material is not specified, a material

shall be used that enables the insulated wire to meet the performance requirements of this specification.

3.3 Conductor. Each conductor shall be equivalent to 511 circular mils (no. 23 AWG). It shall

consist of 21 strands of no. 36 AWG tinned soft cadmium copper alloy, having a 1% nominal

content of cadmium. It shall be bunch stranded with a lay not exceeding .75 inch (19.05 mm). Prior to

stranding, the elongation of individual tinned soft cadmium copper alloy strands shall be not less than

10%, and the tensile strength shall not exceed 55,000 psi. Subsequent to stranding, and prior to