This standard applies to the materials@ constructions@ and testing of weather-resistant thermoplastic and crosslinked polyethylene covered conductors@ rated for 75??or 90??normal service temperature. These conductors are intended primarily for the distribution of electrical energy under normal conditions of overhead (aerial) installations and service outdoors. This standard does not cover Track Resistant Coverings or constructions. The coverings carry no voltage rating@ and the conductors must be installed on insulators adequate for the service voltage. The user may want to give consideration to the dielectric compatibility of the covering@ insulator@ and conductor/insulator tie. When reference is made in this publication to an industry standard@ that reference is to the standard with the title and date of issue listed in Appendix A. Where a conflict exists between the requirements of this standard and those of a referenced standard@ the requirements of this standard shall apply. The recommended bending radii for conductors are given in Appendix B. U.S. Customary units@ except for temperature@ are specified throughout this standard and are the controlling units. Approximate International System of Units (SI) equivalents are included for information only. The rounding-off method of ASTM E 29 shall be used for determining conformance with requirements. To convert from an English unit to the appropriate SI unit@ multiply the value of the English unit by the appropriate number from Appendix C.