Cable markings show all of the following, EXCEPT

• A. Ampacity
• B. Voltage rating
• C. Conductor material
• D. Insulation color

Answer: (A)

Cable markings reveal practical properties that stay with the conductor itself: the material of the conductor (copper or aluminum), the insulation type and color for identification, and the voltage rating the insulation is designed to handle. They may also indicate the conductor size. Ampacity, the current-carrying capacity, isn’t printed on the jacket because it isn’t a fixed property of the cable alone. It depends on how the cable is used—the conductor size, the insulation’s temperature rating, and the installation conditions (like ambient temperature and whether it’s in conduit or in free air). Those factors are tied together using NEC tables to determine safe operating current, not a single ampacity number shown on the cable. So the markings show voltage rating, conductor material, and insulation color, but not ampacity.