If you get the chance, always run more extra network fiber cabling
Running extra fiber and Ethernet cabling whenever walls are open or trenches are dug is widely seen as cheap insurance against future needs, since labor, permits, and duct space cost far more than additional strands. Commenters contrast small-scale/home and telco-scale economics, but generally argue for single‑mode fiber, conduits with pull strings, and generous port placement to handle higher speeds, changing layouts, and failures from rodents, construction, or lightning. Others note that while Wi‑Fi and MoCA increasingly replace edge cabling, robust wired backbones and flexible infrastructure (conduit, innerduct, spare fibers) remain critical for reliability, latency-sensitive work, and long-term upgradeability.
Extra cabling: when “more” makes sense (and when it doesn’t)
- Many agree with the article’s core point: when you’re already opening walls or trenches, extra fiber/copper is cheap insurance; labor, permits, and access are the expensive parts.
- Telco/large-network perspectives push back: duct space, weight on poles, and leased duct costs make “run everything” unrealistic at scale; capacity must be economically planned.
- In small-scale hosting, campus links, or homes, the incremental cost of thicker fiber bundles is often a rounding error compared to pulling again later.
Conduit, pull strings, and physical risks
- Strong consensus: always use conduit where possible and always leave a pull string (or tape); the “dead” cable can sometimes act as a pull, but that’s unreliable on long/lubricated runs.
- Multi-cell innerduct in conduit is praised for making later additions easier.
- Direct-burial copper between buildings is widely discouraged: nearby lightning and seasonal ground movement kill it; fiber or copper+media converters are safer.
- Rodents, raccoons, squirrels, backhoes, ice, and mis-aimed drywall screws are recurring failure modes. Armored or bend-resilient fiber and nail plates help.
Fiber details: bend radius, cleaning, and safety
- Extended debate on minimum bend radius: modern G.657 fiber can bend far tighter than Cat6; jacket specs can be more limiting than the glass itself.
- Emphasis on careful routing (no sharp corners, staples, over-tight zip ties) and on cleaning connector faces; dust can cause intermittent faults.
- Safety: never look into a fiber; assume it’s lit. Use a phone camera or light meter instead.
Single-mode vs multi-mode
- Broad agreement: in 2025, default to single-mode fiber. It’s cheaper or comparable to multimode, scales to far higher speeds/distances, and is what most new data centers and access networks favor.
- Multimode is now mainly for legacy systems or vendor‑locked subsystems; if required, run SMF plus MMF, not MMF alone.
Homes, offices, and WiFi vs wired
- Many homebuilders and renovators regret under-wiring: too few Ethernet drops, no garage/attic/yard runs, not enough circuits or exterior outlets.
- Ceiling APs with wired backhaul are strongly recommended in concrete/brick or metal-stud buildings; WiFi alone often struggles with latency and coverage.
- Small switches can fix “one jack per room,” but 10G switches are still hot and pricey; some settle for 1G/2.5G at edges with 10G fiber or DAC backbones.
Tools and alternatives
- For home/homelab, mechanical connectors often suffice; fusion splicers are now attainable via cheap/used units but seen as overkill for short runs.
- Alternatives like MoCA over coax and powerline are discussed as fallbacks where pulling new cable is impractical.