Calculation of horizontal displacement of conductors under wind loading toward buildings and other supporting structures

Wind loadings can be the determining factor in the structural design and location of supporting structures, including the choice of materials, sizes, and configuration. Deflection of structures or supported facilities under wind loading may require increased clearances between conductors or cables, thus affecting the physical design of the structures, as well as requiring increased clearances from buildings and affecting the location of the structures themselves. Both exact methodologies and rules of thumb are presented for calculating horizontal loadings and wind deflections of conductors and cables. Tables give values for common conductors that may be used in determining compliance with the National Electrical Safety Code