This Recommendation proposes a new system that simultaneously provides power supply and communications using a single twisted pair cable. Traditionally, power and communications have been provided through separate cable systems. However, by twisting the power cable, this new approach enables both functions to be delivered through a single cable to all devices. The new cable system offers multiple advantages including reduced cable resource usage, minimized waste generation and improved efficiency in installation and maintenance. It also promotes reuse and recycling of components, supports long-term utilization of cable systems, and ultimately contributes to conserving both resources and energy. In addition, this cable system limits power supply to a maximum of 90 W per cable (DC 60 V / 1.5 A), which supports energy efficiency and the miniaturization and weight reduction of components and devices, while also enhancing electrical safety. Furthermore, since power and communication can be provided simultaneously to all terminals, it enables energy consumption control through artificial intelligence (AI)-based power management. This contributes to building a new eco-system that supports the realization of a sustainable society.