6 Best Ethernet Cables for Long Distance in 2026 (100m Limit Explained)

For a permanent run between buildings, this is the cable to bury. The combination that matters is shielding plus an outside-plant jacket plus solid bare copper, and getting all three from a manufacturer that Fluke-tests its output.

The F/UTP shielding is the reason to choose this over the unshielded outdoor options. A buried run passes near mains cable, pumps, gate motors and whatever else lives underground on a property. Foil shielding around the four pairs rejects that interference. Remember to bond the shield to ground at one end only.

The OSP (outside plant) jacket is built for sunlight, dirt, snow and standing moisture, and is rated for direct burial without conduit, though conduit is still worth using where you might ever need to pull a replacement.

Electrically it is 23 AWG solid bare copper at 550 MHz, supporting 1 and 5 Gigabit to 328 ft and 10 Gigabit to about 165 ft. Full PoE++ at 100 W across four pairs means you can power a camera or an access point at the far end without a local power supply, which on an outbuilding is often the whole point.

Fluke DSX-8000 tested against ANSI/TIA 568.2-E. For cable going under a lawn you will not dig up again for twenty years, buying the tested one is not where to economise.

If the cable will be installed or used in genuine cold, the jacket material is the specification that matters, and this is the one that addresses it.

Standard polyethylene jackets stiffen sharply below freezing. Bend a cold PE-jacketed cable during a winter install and the jacket can crack, often invisibly, and then water gets in and the run fails months later. fast Cat. uses LLDPE (linear low-density polyethylene), which stays flexible to minus 20 °C and resists cracking and abrasion better.

That matters in two situations: installing in winter, and ground that freezes and thaws seasonally, which flexes buried cable repeatedly over the years.

It is 23 AWG certified solid bare copper at 550 MHz, supporting PoE++ (4PPoE), and it is both ETL and UL listed with a CMX rating for outdoor use. The rigid slash-proof box is the same one that makes fast Cat.’s indoor cable easy to pull.

It is unshielded UTP, so it lacks the interference rejection of the trueCABLE. For a run across an open field or garden that is fine; for one following a buried mains line, choose the shielded option instead.

At $238.99 for 1000 ft it is actually the cheapest per foot of the bulk outdoor cables here, roughly $0.24/ft against trueCABLE’s $0.43.

This is the practical choice for one long run when you have no crimping tools, no cable tester, and no wish to acquire either.

It arrives with gold-plated RJ45 connectors already fitted and tested. That removes the two most common ways a self-installed long run fails: a miswired pair, and a bad crimp that works intermittently. For a 250 ft run buried under a lawn, having the terminations done properly at the factory is worth a great deal.

The conductors are shielded foil twisted pairs of oxygen-free copper, genuine copper, not CCA, rated to 10 Gbps and 600 MHz. The jacket is direct burial rated, so it goes straight in a trench without conduit.

The connectors have flexible PVC bubble boots, which protect the locking clip and make the cable easier to unplug. Sensible on a cable that may be disconnected seasonally.

Two things to plan for. First, you have to pull a pre-terminated cable through whatever hole it passes, and an RJ45 plug needs a larger opening than bare cable, which matters if it is going through conduit or a tight wall penetration. Second, 250 ft is 76 m, comfortably inside the 100 m limit but leaving less margin than you might think once patch leads at both ends are counted.

Not every long run is outdoors. A three-storey house, a barn conversion or a warehouse office can easily need 200 ft of cable without ever leaving the building, and for those, outdoor cable is the wrong choice.

Outdoor jackets are not fire-rated for in-wall use. Running direct burial cable inside a wall cavity is a code violation for the same reason CMR is required there: an unrated jacket carries fire and produces dense smoke. This is the cable for indoor long runs.

23 AWG solid bare copper at 550 MHz, CMR riser rated, gigabit to the full 328 ft and 10 Gigabit to about 165 ft. Every box is Fluke DSX-8000 tested against ANSI/TIA 568.2-D.

The 23 AWG gauge is worth noting specifically for long runs. Thicker conductors have lower resistance, which means less attenuation over distance and less voltage drop under PoE. On a 90 m run, the difference between 23 and 24 AWG is the difference between passing and failing certification.

PoE++ up to 100 W across all four pairs, which combined with the thicker conductors makes this the sensible choice when a long indoor run also has to power something at the far end.

PoE over a long run is where cable quality stops being theoretical, and this is the cable specified for it.

Power delivered over Ethernet drops in voltage along the cable, and the loss is proportional to resistance and length. A camera at 90 m sees noticeably less power than one at 10 m, and on marginal cable it sees too little, producing a device that boots, runs for a while, then reboots. That symptom is almost always cable, and almost never diagnosed as cable.

AiCat is 23 AWG solid bare copper with a PVC cross separator, which keeps the pairs apart for both crosstalk control and heat dissipation. Heat matters here: 100 W of PoE through a bundled run raises temperature, temperature raises resistance, and higher resistance drops more voltage, a loop that gets worse as it goes.

UL 444 listing is a stricter safety certification than the ETL verification most competitors carry, and it is the one worth having when cables inside a wall are carrying real power.

Every box is Fluke DSX-8000 verified, lot-tracked and barcode traceable, and it complies with TIA/EIA 568.2-D, NEMA WC-66, ISO/IEC 11081 and RoHS.

$21.99 for 100 ft of pre-terminated outdoor cable is cheap for a reason, and the reason needs stating plainly: the conductors are copper-clad aluminium, not copper.

That has three consequences. It should not be used for PoE, aluminium’s higher resistance means more heat under load. It is more brittle than copper, so it fails at tight bends and terminations sooner. And it does not meet NEC 800.179, which requires copper conductors in communications cable, so it is not appropriate for a permanent installation you might have inspected.

Where it is a reasonable buy: a temporary or semi-permanent run with no PoE, at a distance where CCA’s higher resistance does not matter much. A cable across a garden to a summer house, out to a workshop for a few months, or to a camping setup. At 100 ft (30 m) you are well inside any distance where the conductor material would degrade a plain data link.

The jacket is genuinely good for the money, LLDPE, UV resistant, water resistant, rated for burial and for extreme temperatures. Twenty cable ties and two dust covers are included, and the ends are factory-fitted with gold-plated plugs.

Think of it as a well-jacketed temporary cable rather than infrastructure. For anything permanent, or anything carrying power, spend the extra on solid copper.