Outdoor Ethernet Cable Use Requires Specific Cable Types

Limitations of Indoor Ethernet Cables Outdoors

Standard indoor Ethernet cables, such as Cat5e and Cat6, are not designed for outdoor environments. Their PVC jackets are susceptible to damage from sunlight, which causes fading and cracking over time. This exposure compromises the cable's internal components, leading to connection degradation.

Outdoor temperatures, rain, and other elements accelerate this deterioration. Additionally, standard copper Ethernet cables lack proper protection against lightning strikes, posing a safety risk and potential equipment damage.

Choosing the Right Outdoor Cable

For outdoor installations, cables specifically rated for exterior exposure are required. These include outdoor-rated Ethernet cables and direct-burial cables. Outdoor cables typically feature a weather-resistant polyethylene (LLDPE or PE) jacket, which offers better resistance to UV exposure, moisture, and temperature fluctuations compared to standard PVC.

Direct-burial cables are designed for underground runs and can withstand long-term exposure to moisture and soil pressure. They often incorporate water-blocking tape, powder, or gel to protect internal wires even if the outer jacket is compromised.

Installation Best Practices and Considerations

Regardless of the cable type, installing surge protection at both ends of an outdoor cable run is a recommended practice. While requiring additional hardware, this measure helps mitigate risks associated with outdoor copper wiring. For situations where copper is undesirable, outdoor-rated fiber optic cables can be used, though any exposed equipment would still be vulnerable to elements.

Local ordinances should be checked for rules regarding buried wires, including conduit requirements, depth, and permitted cable types. For simple, short exterior runs to an outdoor access point, a Cat6 outdoor-rated Ethernet cable is appropriate, and all exterior runs should be securely fastened.