General Order 95
Section IV
Strength Requirements for All Classes of Lines
48.5 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
, 18
, 19
, 20
, 21
, 23
, & 24
of Appendix B
, except for medium–hard drawn copper, are based on the minimum ultimate
strengths given in the standard specifications of the American Society for
Testing Material. The ultimate strengths given in
Appendix B
for medium–hard drawn copper are 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 material not included in
Appendix B
, values for ultimate strengths similarly derived from specifications of
the ASTM shall be used except that, if such 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.