NEIEP Mechanics Practice Exam

What type of core is typically used in traveling cable over 200 feet long?

1. Copper

2. Aluminum

3. Steel

4. Plastic

The correct answer is: Steel

In traveling cable applications, especially for lengths over 200 feet, the use of steel cores is generally preferred due to their strength and durability. Steel provides excellent tensile strength, which is essential for supporting the weight and movements of longer cables as they extend and retract. This added strength helps to prevent sagging or damage, ensuring the cable operates effectively over its length. Moreover, traveling cables are often subjected to harsh conditions, including bending, twisting, and environmental factors. Steel cores can withstand these challenges better than materials like aluminum or plastic, making them suitable for rugged industrial environments. While copper and aluminum may be used in other applications for their conductive properties, they lack the structural integrity required for longer traveling cables, particularly under heavy loads and dynamic movements. Therefore, steel is the material of choice for ensuring reliability and longevity in these types of cables.