Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft
NORMA vydána dne 1.11.2023
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Designation standards: ASTM B8-23
Publication date standards: 1.11.2023
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: American technical standard
Kategorie: Technické normy ASTM
This specification covers standard requirements for bare-concentric-lay stranded conductors made from round copper wires, either uncoated or coated with tin, lead, or lead alloy for general use for electrical purposes. These conductors shall be constructed with a central core surrounded by one or more layers of helically laid wires. The conductors shall be classified as follows: Class AA, Class A, Class B, Class C, and Class D. Sizes, number of wires, and diameter of wires in the various classes of concentric-lay-stranded conductors shall conform to the prescribed requirements. Welds and brazes may be made in rods or in wires prior to final drawing. The completed conductor of varying classes shall conform to the minimum distance required between the joints. Diameters, areas, and mass of concentric-lay-stranded copper conductors shall conform to the prescribed requirements. Physical and electrical tests of conductors stranded of hard-drawn or medium-hard-drawn wires shall be conducted before but not after stranding. The approximate mass and electrical resistance may be determined using the required increments. The material shall also conform to the temperature corrections factor for conductor resistance.
Keywords:
concentric-lay-stranded copper conductors, concentric-lay-stranded hard, copper conductors, copper conductors for electrical purposes, medium-hard, or soft copper conductors,, ICS Number Code 29.060.20 (Cables)