A cable can look heavily shielded on a drawing, use a dense copper braid, and still become the weak point during an EMC test. That catches many development teams off guard because shielding is often treated as a material choice: add foil, specify high braid coverage, and the interference problem should disappear. In real equipment, however, the cable body is only one part of the electromagnetic path. Connector transitions, shield exposure, grounding, installation, frequency, and termination can decide whether the finished assembly actually works.