MIL-M-15562D, MILITARY SPECIFICATION: MATTING OR SHEET, FLOOR COVERING, INSULATING FOR HIGH VOLTAGE APPLICATION (17 JUN 1974) [S/S BY MIL-DTL-15562G]., This specification covers rubber or plastic matting and sheet floor coverings for use around electrical apparatus or circuits, as a safety measure to protect personnel from accidental exposure to electrical potentials not exceeding 3000 volts. Equipment operating at higher voltages utilize other built-in safety measures to provide personnel protection.