0 votes 0 votes The undesirable property of an electrical insulating material is high dielectric strength High relative permittivity high thermal conductivity High insulation resistivity Power Systems gate2014-ee-1 insulation power-system-analysis conducting-wires + – makhdoom ghaya asked Feb 11, 2017 • edited Nov 21, 2019 by Lakshman Bhaiya makhdoom ghaya 9.4k points answer comment Share See all 0 reply Please log in or register to add a comment.