How to reduce coupling when routing power line carrier PLC wiring harnesses?

To reduce coupling in power line carrier PLC wiring harnesses, optimized routing and grouping are necessary. Wiring harness routing should follow the right-angle intersection principle, avoiding parallel runs; if parallel runs are unavoidable, the spacing should be greater than three times the wire diameter. Harness grouping: power lines, signal lines, and high-frequency lines should be bundled separately, with a group distance greater than 5cm. Shielded cables should be used, and the shielding layer should be grounded. Non-metallic cable ties should be used at fixing points to avoid grounding loops. Optimize routing by simulating and analyzing the coupling capacitance and inductance between wiring harnesses. In actual testing, coupling noise measured with an oscilloscope should be less than 5% of the signal amplitude. Reducing coupling can reduce crosstalk by 20dB and improve signal integrity.