A power/data transmission breakout system includes a power/data transmission breakout device coupled to a powering device and each of a plurality of powered devices. The power/data transmission breakout device receives power and data from the powering device via a first power/data cable that is connected to the power/data transmission breakout device, and identifies a first powered device as a destination for the data. The power/data transmission breakout device then transmits a respective subset of the power that was received from the powering device via each of a plurality of second power/data cables that are each connected to the power/data transmission breakout device and a respective one of the plurality of powered devices, and transmits the data along with the respective subset of the power that was received from the powering device via the second power/data cable that is connected to that first powered device.