How much slack should copper backbone cables have for installation?

The correct approach for determining how much slack copper backbone cables should have during installation is to ensure there is enough to facilitate termination. This means that the installation should include sufficient slack to allow for the proper termination of the cables at both ends, accommodating any necessary bending and routing that might occur during the process. Having the right amount of slack helps in making any adjustments or changes post-installation without causing damage to the cables.

Additionally, having adequate slack promotes better organization and reduces stress on the cable connections, which can prevent potential issues like breaks or interference. It's essential for maintaining the overall integrity and performance of the network.

The other considerations, such as coiling or local codes, while important, do not prioritize the immediate requirements for termination, which is why they are not the correct choice here. Local codes may govern various aspects of cabling installation but do not specifically address the need for slack in the context of terminations, which is a practical requirement during installation.