ASTM B786/B786M-08(2018)
Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum Conductors for Subsequent Insulation
- Standard No.
- ASTM B786/B786M-08(2018)
- Release Date
- 2018
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM B786/B786M-08(2023)
- Latest
- ASTM B786/B786M-08(2023)
- Scope
- 1.1 This specification covers bare combination unilaystranded conductors made from round wires of aluminum 1350 and 8000 series of aluminum alloys, for insulated conductors for electrical purposes. Aluminum 1350 wires in tempers -H19 (extra hard), -H16 or -H26 (3⁄4 hard), -H14 or -H24 (1⁄2 hard), and -H142 or -H242 (1⁄2 hard) and 8000 series aluminum alloys wires in tempers “0” and H1X or H2X are permitted. These conductors shall be constructed with a central core wire surrounded by two layers of helically laid wires, resulting in an outer diameter equal to the compressed-stranded equivalent conductors. NOTE 1—For the purpose of this specification, combination unilay conductor is defined as follows: a central core wire surrounded by a layer of six helically laid wires of the same diameter as the core wire with a helically laid outer layer containing six smaller wires alternated between six wires of the same diameter as the wires in the layer underneath. Both layers have a common length and direction of lay (see Fig. 1). 1.1.1 For the purpose of this specification, normal conductor classification (Class AA, A, B, C) is not applicable, as these conductors are intended for subsequent insulation. The descriptive term combination unilay-stranded shall be used in place of conductor classification (Note 2 and Note 3). NOTE 2—Prior to 1975, aluminum 1350 was designated as EC aluminum. NOTE 3—The aluminum and temper designations conform to ANSI Standard H35.1. Aluminum 1350 corresponds to Unified Numbering System A91350 in accordance with Practice E527. Unified Numbering System alloy designations for 8000 Series aluminum alloys in accordance with Practice E527 are listed in Table number 1 of Specification B800. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM B786/B786M-08(2018) Referenced Document
- ASTM B193 Standard Test Method for Resistivity of Electrical Conductor Materials
- ASTM B230/B230M Standard Specification for Aluminum 1350-H19 Wire for Electrical Purposes
- ASTM B263 Standard Test Method for Determination of Cross-Sectional Area of Stranded Conductors
- ASTM B609/B609M Standard Specification for Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes
- ASTM B800 Standard Specification for 8000 Series Aluminum Alloy Wire for Electrical Purposes—Annealed and Intermediate Tempers*， 2021-02-01 Update
- ASTM B801 Standard Specification for Concentric-Lay-Stranded Conductors of 8000 Series Aluminum Alloy for Subsequent Covering or Insulation
- ASTM E29 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
- ASTM E527 Standard Practice for Numbering Metals and Alloys (UNS)
ASTM B786/B786M-08(2018) history
- 2023 ASTM B786/B786M-08(2023) Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum Conductors for Subsequent Insulation
- 2018 ASTM B786/B786M-08(2018) Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum Conductors for Subsequent Insulation
- 2008 ASTM B786/B786M-08(2013)e1 Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum Conductors for Subsequent Insulation
- 2008 ASTM B786-08(2013) Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum Conductors for Subsequent Insulation
- 2008 ASTM B786-08 Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum Conductors for Subsequent Insulation
- 2002 ASTM B786-02a Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum Conductors for Subsequent Insulation
- 2002 ASTM B786-02 Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum Conductors for Subsequent Insulation
- 2000 ASTM B786-00 Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum Conductors for Subsequent Insulation
