Most lengthy length power lines don’t use insulation across the conductors them selves. Insulating in this way would need to be so thick that it wouldn’t be cost effective. In its place, almost all of the insulation originates from air gaps, or simply spacing all the things far ample apart. https://opticiansnearme47756.mdkblog.com/35576855/rumored-buzz-on-cheap-prescription-glasses