metallkärnors

Metallkärnor refers to the metallic core found within certain types of cables, most commonly electrical wires and optical fibers. In electrical cables, this core is typically made of copper or aluminum, metals chosen for their excellent conductivity. Copper is widely used due to its superior conductivity and malleability, making it easy to shape and bend. Aluminum is a lighter and less expensive alternative, often employed in high-voltage transmission lines where weight is a significant factor. The specific material and construction of the metallkärna are crucial for determining the cable's electrical performance, including its resistance and current-carrying capacity.

In the context of optical fibers, the term metallkärna can sometimes be used to describe a metallic strengthening element or a metallic coating within the fiber's structure. While the primary information-carrying component of an optical fiber is glass or plastic, metallic components may be incorporated for mechanical support, protection, or to provide grounding. These metallic elements do not transmit light themselves but contribute to the overall durability and integrity of the fiber optic cable. The presence and type of metallkärna in any cable are dictated by its intended application and the performance requirements.