Differences between shielded and unshielded, and plenum versus nonplenum systems.
Differences between shielded and unshielded, and plenum versus nonplenum systems.
I'm considering laying a 15-foot Ethernet wire through a wall filled with existing cables, including router and house wiring. Some folks recommend using plenum for safety reasons, while others suggest shielding to protect the signal. Both options come at a higher cost. What are your thoughts? Should I go with shielded/plenum or just one of them, or skip it altogether? Thanks!
Shielded wiring makes sense when cables stay away from household electrical systems and sensitive equipment like fans or HVAC components. Keeping it out of high-voltage areas and plenum spaces is crucial for safety. Building regulations often call for plenum cable near heat sources to prevent hazards. For ducted HVAC systems, local codes may allow alternatives, but prioritizing safety in emergencies is essential.
Choose straightforward riser cables. Interference won't be an issue. Shielded wires require proper connections and accurate grounding. Plenum cable is suitable for routing through ducts or airways. If your home faces fire risks, you'll need to address more serious concerns. There are already many other hazardous materials present that can worsen when burned.
Plenum or non-plenum doesn't affect a single cable over short distances. This becomes important when many cables are bundled together over long air runs behind ceilings. Most building codes permit roughly a 50-foot stretch of non-plenum before switching to plenum. Un-shielded cables work as long as they aren't near power supplies or fluorescent lights, which can create electromagnetic fields. Problems might appear close to house wiring but are unlikely at this short range.
Shielding can increase interference unless it's linked to a grounded switch.