Wiring and Cable Design Avoid 'Front Door EMI"

מק"ט: #50105 | משך קורס: 16 שעות אק'

The discipline of Electromagnetic Compatibility (EMC) concerned with the design of Electronic Systems, while minimizing electromagnetic coupling and interference from within the system and between the systems to its environment. The discipline of electromagnetic compatibility covers and requires involvement in a wide range of other fields of engineering, wiring and cabling engineering, electronic engineering, etc.


Meeting the strict EMC standards, as well as ensuring the satisfactory performance of the equipment in its intended electromagnetic environment requires the implementation of technical measures into the system’s design. Most interaction of electromagnetic fields and systems occur via the cables and wiring associated with the System. In fact, very appropriately, field to cable interactions are considered “the front door of EMI”. Therefore, no EMC design can be complete without the proper implementation of proper design of cables of wiring. Proper implementation of the necessary design measures in the early stages of the electronic equipment cables and wiring design and installation is a mandatory and yet cost-effective approach for the control of EMI in modern electrical and electronic equipment.

*שדות חובה
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This two-day comprehensive Course provides the trainees with the necessary tools for identification, analysis and understanding of the electromagnetic phenomena related to electronic equipment cables and wiring design and installation. The Course will emphasize the basic principles and practical applications of field to cable interactions, including radiation and coupling of EMI to cables, crosstalk and the subsequent wiring, cable and harness design, with mathematical derivations and calculations kept to the minimum necessary. The Course will cover most topics related to the discipline of wiring and cable design for EMC, which the wiring and cable designers may encounter along his work. This includes cable and wiring selection, cable shielding characterization and implementation, including maintaining shield integrity, shield grounding, installation and routing of cables and the necessary cable to enclosure interface for achieving EMC.
Practical solutions to practical problems, as well as “real life case histories” are used as examples, and case studies are extensively used along the Course. Bring your interference problems and return with practical and useful solutions.


  • Obtain a systematic approach to equipment wiring and cabling design for achieving EMC
  • Acquire a fundamental knowledge of the problem and interference sources in electrical and electronic systems
  • Understand the importance of the enclosure-wiring interface, and acquire a “common language” with the electronic and mechanical design engineers for achieving total system compatibility

In addition, participants are encouraged to bring forward actual design problems and questions they encountered, which the instructor will attempt to assist in their solution.

קהל יעד

The Course is intended for wiring and cable design engineers and technicians, who are involved in the design and development, qualification or engineering management of electronic and electrical wiring and cables and their installation.

תנאי קדם

Basic understanding of electronic components and circuits.


Module 1: Introduction

  • Basics of EMC
    • Nature of an EMI problem
    • EMI Sources, Victims and Interactions
    • “EMI - The Silent Threat”: A Video Presentation
  • Signals and Coupling Modes
    • Spectral contents of signals
    • Interference modes – Common Mode vs. Differential Mode Signals
    • Signal Coupling and Propagation: “Path of Least Inductance”
    • Transmission Line Basics and Frequency Considerations


Module 2: Cable Interaction

  • Field-To-Cable Coupling
    • Emission of fields from cables
    • Electric and Electromagnetic Field to Cables Interactions
    • Magnetic Field to Cables Interactions
    • Frequency Considerations in Field to Cables Interactions
  • Cable Crosstalk and Its Control
    • Capacitive and Inductive Coupling
    • Crosstalk Prediction Techniques
    • Cable Crosstalk Control Methods


Module 3: Cable Shielding

  • Cable Shielding for Electromagnetic Fields
    • Why Shield Cables?
    • Shield Surface Transfer Impedance
    • Shield Termination
    • Frequency Considerations in Cables Shielding
  • Cable Shielding for Magnetic Fields
    • The Basic Magnetic Field Problem
    • Low-Frequency Magnetic Shields
    • Super Screen
  • Cable Grounding vs. Shield Grounding
    • Signal Cable Grounding
    • Cable Shield Grounding


Module 4: Cable and Harness Design

  • Cable Selection Principles
    • Cable Equivalent Circuits and Impedance Matching
    • Cable Types and Classification
    • Cable Selection Based on Signal Performance
  • EMI Solutions in Cable Design
    • Cable Geometry and Configuration
    • Twisting Wire Pairs
    • Braided and Foil-Cable Shields
    • Multi-layer Shields
    • Coaxial and Tri-axial Shields
    • Discrete and Printed Ribbon Cable
    • Fiber Optics
  • Connector Selection and Termination
    • Connector Types and Configurations
    • Connector Backshells
    • Shield Termination, Grounding and Continuity
  • Filtering at the Connector
    • Filtered Connectors
  • Cable Harness Design
    • Shielding/Twisting Needs Determination
    • Cable Classification Approaches
    • Separation of Cable Categories
    • Harness Overall Shield Termination
    • EMC Considerations in System ICD (Interface Control Document)
  • Cable Design Myths and Pitfalls
    • “Single End Shield Grounding”
    • “Shield Ground Loops”


Module 5: Summary and Wrap-up

  • Cable EMI Case Histories
  • Summary
  • Q&A's