General Order 64-A

Section X

Supply And Communication Lines In Crossings Or Conflicts

101.1    Height Adjacent to Crossings.

The vertical difference of the conductor level between the crossing and adjacent poles, towers or structures, shall at all times, be less than that which would produce an uplift strain on the pine, insulator or tie, on the adjacent poles, towers or structures, to crossing spans, unless special precaution is taken to prevent the conductor from becoming detached from insulator.