Original
General Order
95
Section
IV
Strength Requirements for All Classes of
Lines
48.4 Conductors, Span Wires, Guys and Messengers
Values used for ultimate strengths of wires and cable shall not exceed those given in Appendix B. The ultimate strengths given in Tables 17 to 24 of Appendix B, except for medium-hard-drawn copper, are based on the minimum ultimate strengths given in the standards specifications of the American Society for Testing Materials. The ultimate strengths given in Appendix B for medium-hard-drawn copper based on the standard specifications of the ASTM and provide an allowance above the minimum values of one-quarter of the range between minimum and maximum values. For use of types of wires and cables of other materials not included in Appendix B, values for ultimate strengths similarly derived from specifications are nonexistent, maker’s specifications may be used provided that tests have been made which shall justify the maker’s rating for ultimate strength.