Filter Wiring / Connection Tips
EMI filtering works both ways. It stops noise on the power line from getting in and stops the noise generated inside the system from going out. Since the noise predominantly travels over the power lines and is often radiated from those, filter wiring/connection becomes crucial in the EMI filter installation process. Keeping wiring best practices in mind can help to reduce a lot of potential EMI problems.

• Aim to keep power and control wiring separated. Ensure that power and control wires do not run parallel. If cables must cross, ensure that cables cross at or as close to a right angle as possible.
• Route the conductors as close to the panel as you can.
• Ensure that the filter input and output conductors are separated.
• Keep input and output leads separated.
• Use shielded wiring if necessary, especially, on the side that needs to be protected from the radiated noise.
• Ensure that the shield of shielded cables is terminated at both ends.

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