Final answer:
The classification EH12 for a welding electrode does not indicate its carbon content directly; the percentage of carbon content would need to be determined from the manufacturer's specifications or the electrode's MSDS.
Step-by-step explanation:
If an electrode is classified as EH12, it refers to the type of welding electrode that is being used. The classification system for welding electrodes usually includes a series of letters and numbers that indicate the electrode's characteristics, such as tensile strength, welding position, type of coating, and the current that it can be used with.
However, the classification does not directly specify the carbon content of the electrode. To determine the normal carbon content of an electrode, one would typically need to refer to the manufacturer's specifications or the material safety data sheet (MSDS) for that specific electrode. Therefore, without additional context or information, it is not possible to determine the carbon content solely based on the classification EH12.