FAQ
TL;DR: Home LANs reach 1 Gbit/s on compliant Cat5/5e; “You are buying a good brand non-shielded 5e, 6a cable and it will work.” [Elektroda, m.jastrzebski, post #16697203]
Why it matters: This FAQ shows how to wire three room sockets to a hall router for reliable, upgrade-ready networking—ideal for homeowners and renters setting up stable Ethernet without guesswork.
Quick Facts
- Topology: run point‑to‑point cables from router LAN ports, or add a switch at the router if ports are short. [Elektroda, wniedzie, post #16695308]
- Cabling: quality unshielded Cat5e or Cat6A works for gigabit; avoid overcomplicating shielding in typical homes. [Elektroda, m.jastrzebski, post #16697203]
- Shielding rule: if you use FTP/STP, the screen must be grounded; do not bond to radiators. [Elektroda, hermes-80, post #16697059]
- Termination: stay consistent—choose T568A or T568B and wire both ends the same. [Elektroda, m.jastrzebski, post #16697354]
- Conductors: prefer solid copper; avoid copper‑clad aluminum (CCA) Ethernet cables. [Elektroda, gkwiatkowski, post #16697214]
Should I run each room socket directly to the router or daisy‑chain?
Use a point‑to‑point run from each room socket to the router’s LAN ports. If the router lacks enough ports, place an Ethernet switch beside it and land each cable there. This delivers full bandwidth per room and simpler troubleshooting than daisy‑chains. [Elektroda, wniedzie, post #16695308]
What Ethernet cable should I install for a home with three rooms?
Install quality unshielded Cat5e or Cat6A from a reputable brand. Cat5e handles gigabit when compliant, and Cat6A adds headroom for future upgrades. “You are buying a good brand non-shielded 5e, 6a cable and it will work.” This balances cost, performance, and ease of termination for DIY. [Elektroda, m.jastrzebski, post #16697203]
Is Cat6 required for 1 Gbit/s?
No. Compliant Cat5 or Cat5e supports 1 Gbit/s. If gigabit fails on a labeled Cat5e, the cable or termination likely misses spec. Focus on proper terminations and reputable cable. Test links after punching down to confirm gigabit. [Elektroda, m.jastrzebski, post #16697203]
Do I need shielded cable (FTP/STP) in a house?
Usually no. Shielding helps mainly in specific interference conditions uncommon in homes. An improperly grounded shield can worsen performance. Choose unshielded for simplicity unless a clear EMI source exists. Keep runs clear of power lines either way. [Elektroda, m.jastrzebski, post #16697203]
If I do use shielded cable, must I ground it?
Yes. Every screened cable must be properly grounded to be effective. Do not connect the screen to ad‑hoc points like a radiator. Use shielded jacks and a grounding path designed for structured cabling hardware. [Elektroda, hermes-80, post #16697059]
Which wiring scheme should I pick: T568A or T568B?
Pick one scheme and stick with it end‑to‑end. Consistency matters more than which scheme you choose. Wire both the patch panel/keystone and the remote jack the same. Mixed terminations on one run cause link failures. [Elektroda, m.jastrzebski, post #16697354]
Can different runs use A on one cable and B on another?
Yes. Each individual run must match at both ends, but different runs can use different schemes. Keep clear labels so future work stays consistent. “Both ends of the cable... must be made in the same standard.” [Elektroda, m.jastrzebski, post #16697354]
Are keystone jacks fine for room sockets?
Yes. Keystone jacks are modular terminations that accept punch‑down wiring in T568A or T568B. They let you mount neat wall plates and swap components easily. Terminate your in‑wall cable on the keystone, then use a short patch cord to the device. [Elektroda, l1m4k, post #16697343]
Should I install one or two cables per wall point?
Pull two cables per location. It increases reliability and flexibility. You can run two 1 Gbit/s ports or four 100 Mbit/s ports from a single double‑jack. This future‑proofs TVs, consoles, set‑top boxes, and PCs at one spot. [Elektroda, hermes-80, post #16697375]
Can I reach 10 Gbit/s later if I install Cat6A now?
Yes. Cat6A is specified to support up to 10 Gbit/s. If you foresee multi‑gig upgrades, installing Cat6A during construction saves re‑cabling later. Use quality components and keep runs tidy for best results. [Elektroda, hermes-80, post #16697375]
Are cheap CCA (copper‑clad aluminum) Ethernet cables okay?
Avoid CCA. Choose cables made entirely of copper conductors. CCA increases resistance, complicates PoE, and can fail terminations. Solid copper improves reliability and supports full‑spec performance in the long term. [Elektroda, gkwiatkowski, post #16697214]
How do I terminate a run correctly on keystones?
- Pick T568A or T568B and match the color code on both ends.
- Punch down pairs fully with a 110 tool; keep twists to the posts.
- Test with a cable tester for continuity and gigabit link. [Elektroda, m.jastrzebski, post #16697354]
What if my gigabit link drops or seems slow?
Suspect termination first. Re‑punch pairs, ensure twists reach the IDC slots, and confirm both ends use the same scheme. Using shielded cable without proper grounding can also degrade performance. Swap in a known‑good patch cord to isolate issues. [Elektroda, m.jastrzebski, post #16697203]
My router has only two LAN ports. How do I serve three rooms?
Add an unmanaged Ethernet switch near the router. Connect the router LAN to the switch uplink, then each room run to the switch. This lets all three sockets work simultaneously with full throughput per port. [Elektroda, wniedzie, post #16695308]
Does mixing shielded cable with unshielded jacks cause problems?
Yes. Using FTP cable with unshielded connectors leaves the screen floating. A floating screen can act like an antenna and hurt performance. If you choose shielding, use shielded jacks and provide grounding. [Elektroda, m.jastrzebski, post #16697203]
Is T568B more common, and should I just use it everywhere?
Many installers choose T568B for consistency. Using one scheme across your home simplifies labeling and maintenance. The key is keeping both ends identical for each run. Standardize on one and document it. [Elektroda, hermes-80, post #16697454]