hey guys I'm not very good when it comes to electricity/electronics but would an extra layer of shie

hey guys I'm not very good when it comes to electricity/electronics but would an extra layer of shielding help? Like another layer of heat wrap? With electricity not really going through the wires I'm guessing that's what causes the 'noise' when the wires are bunched up & not when they're out straight? Then would the extra layer of heat wrap help or not really? More curious than anything now πŸ˜†
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