A High-Voltage Cable Cross-Section (image) Chalmers University of Technology Share Print E-Mail Caption A high-voltage cable cross-section is depicted. The electrically conductive core is covered by a black protective layer, a white insulation layer of plastic and an additional black protective layer. Credit Carolina Eek Jaworski Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.