In which condition may communications cables be allowed to run alongside electric power circuits?

Communications cables can be allowed to run alongside electric power circuits under special permissions due to specific regulatory standards and safety practices. These permissions are typically granted when it can be assured that adequate safety measures have been taken to prevent interference and maintain the integrity of both the communication signals and the power circuits.

This practice recognizes that, while it's generally safer to keep communications and power cables separate to reduce the risk of electromagnetic interference and potential safety hazards, certain installations may require them to be in close proximity. Under these circumstances, regulations may specify necessary conditions—such as using cables designed to minimize interference or implementing additional protective measures—to ensure a safe and functional installation. This is particularly important in complex environments like commercial buildings or data centers, where the demand for space and efficiency often necessitates such configurations.

While other options suggest maintaining distances or using shielding, they do not account for the regulatory framework that allows for flexibility under special circumstances when all safety protocols are adhered to.