ASTM B978/B978M-14

ASTM B978/B978M-14 - 1.4.2014

1. Scope

1.1 This specification covers concentric-lay-stranded conductors made from round aluminum-zirconium alloy wires and an aluminum matrix composite (AMC) core wire(s) for use as overhead electrical conductors (Explanatory Note 1 and Explanatory Note 2).

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.

2. Referenced Documents

B941-24	Standard Specification for Heat Resistant Aluminum-Zirconium Alloy Wire for Electrical Purposes
B976-21	Standard Specification for Fiber Reinforced Aluminum Matrix Composite (AMC) Core Wire for Aluminum Conductors Aluminum Matrix Composite Reinforced (ACAMCR) (formerly known as ACCR)
Aluminum Association Guideline	A Method of Stress-Strain Testing of Aluminum Conductors and ACSR and a Test Method for Determining the Long Time Creep of Aluminum Conductors in Overhead Lines
B263-04	Standard Test Method for Determination of Cross-Sectional Area of Stranded Conductors
E29-22	Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
B682-01(2024)	Standard Specification for Standard Metric Sizes of Electrical Conductors
B354-23	Standard Terminology Relating to Uninsulated Metallic Electrical Conductors
Publication 50	Code Words for Overhead Aluminum Electrical Conductors
NBS Handbook 100	--Copper Wire Tables