Beldon wire and cable make great Teflon silver plated wire. I had 100’ 18awg 3 conductors with a silver plated shield. You connect the shield a receive ground end and double up wires on the 18 grounds. Do Not connect the shield at both ends proved to increase shield performance. Use excellent connectors and you have great interconnect cables. If you have a large commercial wire reseller in your area they normally have left over from a spool. The spools come 500 and 1000 ft rolls of the stuff and the prices have gone way up and the Teflon is a hassle to strip but worth the effort.