What is the (K) constant for aluminum?

The (K) constant, also known as the resistivity constant, for aluminum is important in electrical applications because it helps determine how much resistance a specific length of aluminum wire will have under certain conditions. The correct value of the (K) constant for aluminum is 21.2 ohm-millimeters squared per meter. This value is significant because it reflects aluminum's ability to conduct electricity, and it is often utilized in calculations for electrical systems to ensure efficiency and safety. When selecting materials for wiring, understanding the (K) constant assists engineers and electricians in making informed choices based on current-carrying capacity and resistance considerations.