Can you run regular Ethernet cables outside?

Standard indoor Ethernet cables can be run outside, but their PVC jackets can degrade under sunlight, rain and temperature changes, eventually exposing the wiring and disrupting the connection. The article advises using cables rated for outdoor conditions to reduce this risk and protect the installation.

For a short exterior run, use outdoor-rated cable; for a route underground, choose one marked for direct burial and check local rules on burial depth, conduit and permitted cable types. Look for markings such as “CMX”, “OSP”, “UV-resistant” or “outdoor”, secure cables against abrasion, and fit surge protection at both ends. Outdoor-rated cables may not meet indoor fire-safety requirements, so check their documentation before bringing them inside; outdoor-rated fibre is another option.