> For the complete documentation index, see [llms.txt](https://docs.rekor.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rekor.ai/edge-pro/installing/cable-connection.md).
# Cable Connection
## Safety Precautions
* The lightning arrester must be installed and grounded if you install the camera outdoors.
* Strong and weak current cables must be kept at least 5 cm apart from each other. When connecting the cables to the device, take care to avoid connecting strong current cables to weak current interfaces or you will damage your device.
* The tail of the cable must be cut if it cannot pass through the wall, please keep the label on the tail of the cable. Please make sure to use insulating tape and waterproof tape to insulate and waterproof all tails of cable to avoid short circuits and water leakage.
* Wrap all pigtail cables in insulated, waterproof, rubber tape to prevent short circuits or water damage.
## Power cable connection
Connect the ground cable to ground the device, and then connect the power cable. If crimp terminals are not used, the wire thickness cannot exceed 1.5mm2, and the length cannot exceed 25m. If crimp terminals are used, the wire can be up to 0.75mm2 for a 15 m length of wiring or up to 1.0mm2 if 20 m is required. Longer wiring is not supported. The ground impedance cannot exceed 5 ohms.
## Ethernet/POE cable installation
Connect the network cable. Mount the number O-ring for the waterproof connector onto the network cable port and install the remaining components of the waterproof connector in the sequence shown below. The waterproof connectors of the network cable must be secured tightly or they may come loose later.
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