Standard Specification for 19 Wire Combination Unilay-Stranded Aluminum 1350 Conductors for Subsequent Insulation
|Publication Date:||15 July 1993|
|ICS Code (Cables):||29.060.20|
1.1 This specification covers aluminum 1350-H19 (extra hard), 1350-H16 or −H26 (3/4hard), 1350-H14 or −H24 (½ hard), and 1350-H142 or −H242 (½ hard) bare combination unilay-stranded conductors made from round aluminum wires, for insulated conductors for electrical purposes. 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).
1.2 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 H 35.1. Aluminum 1350 corresponds to Unified Numbering System A91350 in accordance with Practice E 527.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.