A portable computing device can include one or more clutch assemblies that can include a conductive elastomer configured to contact at least a portion of the clutch assembly of the portable computing device. The conductive elastomer can be configured to also contact at least one region of the base portion of the portable computing device and can include highly conductive regions. A USB grounding plate can be attached to a portion of a case for the portable computing device and can be configured to provide a ground pathway between the case and a ground sheath of a USB connector inserted into an opening in a side wall of the case.