Ethernet Cables Guide — Which Category to Actually Pull
Cat6a is the right cable to pull through walls in 2026. Cat5e is fine if it's already there. Cat7 and Cat8 are mostly marketing for residential. Fiber matters in specific cases. Here's the full breakdown from a 22-year installer.
The honest answer up front
For 99% of residential installs in 2026, Cat6a is the right cable to pull through your walls. It handles 10 Gbps to 100m, future-proofs for the next decade, and the price difference vs Cat6 is small. Cat7 and Cat8 are mostly snake oil for residential. Fiber matters only in specific multi-gig backbone cases. Here's the full breakdown.
The Ethernet cable hierarchy
| Cable | Speed | Distance | When to use |
|---|---|---|---|
| Cat5e | 1 Gbps | 100m | Existing in older houses — fine for sub-1-Gbps internet. Don't pull NEW Cat5e in 2026. |
| Cat6 | 1 Gbps standard, 10 Gbps to 55m | 100m at 1 Gbps | Acceptable for new pulls in budget-conscious installs. Use Cat6a instead if your budget allows ($0.30/ft more). |
| Cat6a | 10 Gbps | 100m | The right choice for residential new pulls in 2026. Handles 10 Gbps over the full run. Slightly thicker than Cat6. |
| Cat7 | 10 Gbps | 100m | Marketed for residential but uses non-standard connectors (GG45/TERA). Skip — Cat6a does the same job with standard RJ45. |
| Cat8 | 40 Gbps | 30m | Data center cable. Useless for residential — short distance limit, expensive, no household device uses 40G yet. |
| Fiber (multimode OM4) | 10-100 Gbps | 300m+ | For multi-gig backbone (rack to rack across long distances), commercial installs, or future-proofing a custom-built home. |
The "Cat7 / Cat8" confusion
You'll see Cat7 and Cat8 cables marketed heavily on Amazon and at big-box stores. They're mostly a scam for residential applications. Here's why:
- Cat7 uses a different connector standard (GG45 or TERA) that no consumer device supports. The "Cat7" cables sold with RJ45 connectors are NOT actually Cat7 — they're Cat6a with marketing.
- Cat8 is real but limited to 30m runs. No residential application uses 40 Gbps yet. Save the money — Cat6a handles 10 Gbps to 100m which is the realistic ceiling for residential for the next 10 years.
Patch cables vs in-wall cable
"Cable" can mean two different things. Don't mix them up.
Patch cables (pre-made, terminated)
The cables you buy on Amazon with RJ45 ends already attached. Used to connect device-to-switch, switch-to-router, etc. Buy Cat6a patches in 1ft, 3ft, 6ft, 10ft lengths. Color-code if you can. Cat6a patch cables on Amazon.
In-wall cable (bulk, unterminated)
The cable that gets pulled through walls and ceilings. Buy by the box (500ft or 1000ft). Look for CMR (riser) rating for floor-to-floor runs and CMP (plenum) rating for ceilings/HVAC spaces. Terminate at keystone jacks (wall plates) and patch panels (rack side). Bulk Cat6a CMR on Amazon.
The structured wiring checklist for a new build / renovation
If you're building or renovating, this is what to wire in BEFORE drywall goes up. It's the cheapest possible time to do it. After drywall, every Ethernet drop costs 10-50× more.
- Every TV location — minimum 2× Cat6a drops per TV (one for the TV, one for a streaming device / future use)
- Every primary device location — desk in home office, kitchen counter (Sonos / smart display), bedroom (smart hub / future device)
- Every ceiling access-point location — 1× Cat6a per AP, terminated with keystone in the ceiling box, PoE-fed from the rack
- Every potential security camera location — corners of house exterior, garage, gate, driveway, doorbell
- Every potential PoE device location — front door bell, side-yard motion sensor, smoke detector network points
- Central rack location — closet or basement with proper ventilation, dedicated 20A outlet, all cables homerun here
For a 3,000-5,000 sq ft new build, expect 20-40 Cat6a drops total. Hardware (cable + jacks + patch panel + rack) is $800-$1,500. Labor for a structured-wiring specialist is $3,000-$8,000. Total: $4,000-$10,000 for a network that'll work for the next 15 years.
Fiber — when it actually matters at home
Fiber inside the home (not from your ISP — that's separate) makes sense in narrow cases:
- Multi-gig backbone — connecting two switches across a long distance (basement rack to attic AP closet) where Cat6a wouldn't carry 10 Gbps cleanly
- Detached structures — running cable to a detached garage, pool house, or studio. Fiber doesn't suffer from ground-loop or surge issues like copper does.
- Future-proofing custom homes — running OM4 multimode alongside Cat6a means you can upgrade to 100 Gbps backbone someday without re-pulling
Termination requires fiber tools and skill — usually a job for a structured-wiring specialist, not a DIY. Materials: OM4 multimode is $0.60-$1.20/ft, plus connectors and patch panel ports.
★ Rick's install rule
If you're pulling cable in 2026, pull Cat6a. Don't pull Cat5e (last decade). Don't pull Cat6 (saves a few cents, locks you at 1 Gbps over the full run). Don't pull Cat7 or Cat8 (snake oil for residential). Cat6a, properly terminated to keystone jacks and a patch panel, handles every realistic residential need for the next 10-15 years.