Most extensive distance power lines don’t use insulation around the conductors by themselves. Insulating in this way would have to be so thick that it wouldn’t be cost effective. As a substitute, the vast majority of insulation originates from air gaps, or just spacing every thing significantly adequate aside. Transmission https://surround-sound-system60471.boyblogguide.com/29280824/the-definitive-guide-to-car-speakers