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For cameras that watch an entry point you cannot afford to lose, Power over Ethernet is the better choice, and Wi-Fi is the better choice when running a cable is not realistic. That is the short answer. PoE wins on reliability because one cable carries both the video and the electricity, so there is no battery to swap and no wireless link to degrade. Wi-Fi wins on convenience, since a camera that only needs a nearby outlet can go almost anywhere. Most households end up with a mix, and the useful question is which spots deserve the cable.
What PoE actually is
Power over Ethernet sends electrical power along the same twisted-pair cable that carries network data. A switch or an injector at one end supplies the power, and the camera at the other end draws it. According to the overview of the IEEE standards, the original 802.3af standard (Type 1) delivers up to 12.95 W at the powered device, and 802.3at (Type 2, often called PoE+) delivers 25.5 W. The newer 802.3bt standard goes higher still. A typical fixed security camera fits comfortably inside the lower tiers. A camera with heaters, motors for pan and tilt, or a built-in spotlight draws more, so check the maximum wattage on the spec sheet and match it to the switch port.
The distance limit is the number people remember. Both Reolink and Netgear state the maximum Ethernet cable length for 802.3af, at and bt as 100 meters, or 328 feet. Reolink adds a caveat that the nominal limit hides: power draw causes voltage drop along the wire, and it reports night-time camera brownouts beyond roughly 50 to 60 meters on heavy loads. Infrared illumination turns on at night, so a camera that runs fine all day can reboot at dusk at the far end of a long cable.
The cable itself matters
Cat5e, Cat6 and Cat6a all share the same 100-meter ceiling, so a fancier category does not buy distance. What does matter is the metal. Reolink specifically warns against copper-clad aluminum cable, saying it has higher resistance than solid copper and can raise voltage drop and heat on long runs. Cheap bulk spools sold online are sometimes this kind of cable. Look for solid bare copper in the product description, and for outdoor runs, cable rated for outdoor or direct burial use. If the run exceeds the limit, an inline PoE extender regenerates the signal and power, though each extra device is one more thing to fail.
Netgear’s guidance on categories is Cat 5 as a minimum for 802.3af and at, with Cat 5e or Cat 6 recommended. In practice nobody buys Cat 5 anymore. Spend the small extra amount for Cat 6 while the wall is open, since the labor is the expensive part of the job.
Where Wi-Fi cameras hold up, and where they do not
A Wi-Fi camera still needs power. It is either plugged into an outlet, running on a battery, or fed by a solar panel, a setup we looked at in whether a solar camera is worth it. The wireless part only removes the data cable. That is a real convenience on a detached garage or a rented apartment, and a poor trade at a front door if the signal there is weak.
Signal strength is the weak point. A camera at the edge of your router’s range may connect fine at noon and stutter in the evening when every neighbor’s network is busy. Wi-Fi also shares airtime with everything else you own. A camera that streams continuous video to a recorder uses far more of that capacity than one that sends a clip on motion. Wired systems sidestep that contention.
The failure mode when something goes wrong is also different. A Wi-Fi camera that loses its connection falls back to whatever its internal memory or card can do, and one with no local storage records nothing. We discuss that tradeoff in local storage versus cloud cameras. A PoE camera can lose its internet connection and still record to a box in your house, because the cable to that box is not affected.
Installation: the part nobody budgets for
A wired camera makes a hole in your wall. Someone has to run the cable from a central point, usually a router or a small switch, to each camera location, through an attic, a crawlspace or the exterior. If you own the house and are comfortable in the attic, that is a weekend. If you rent, it may be a lease violation, and our notes on lease rules for security devices explain why asking first is cheaper than a deposit deduction.
Plan the power too. A PoE switch has a total wattage budget, and the number of ports does not tell you how many cameras it can run at full power. A switch advertising eight ports may have a total budget that supports fewer than eight high-draw cameras. Add up the maximum draw of every camera and compare it to the switch’s stated total, leaving a margin.
One more practical point: a PoE camera needs an NVR, a switch with a compatible recorder, or a network video server to be useful. Some systems bundle these, and some brands lock cameras to their own recorder. Open-standard cameras give you more freedom later, and proprietary ones sometimes work out of the box more easily. Neither is wrong, but it is worth knowing which one you are buying before the cable goes in the wall.
A sensible split
Use cable where the camera guards something that matters and where the route is easy: the front door, the driveway approach, the back entry. Use Wi-Fi for the awkward corners, for interior cameras you may move, and for any spot where a cable would be a lease problem. Pair both with local recording. For help choosing hardware, our roundup of the best home security cameras covers the product side.
Our take
If you own the house and can run a cable, put PoE on the cameras that guard your doors and use Wi-Fi for everything else. Skip copper-clad aluminum cable, check the switch’s total wattage, and keep any long run under about 50 meters if the camera has infrared or a spotlight.
Common questions about PoE and Wi-Fi cameras
Can a PoE camera work without internet?
Yes, if it records to a local recorder on the same network. The camera and recorder only need the switch between them. You lose remote viewing and cloud features until the internet returns.
How far can a PoE camera be from the switch?
The Ethernet standard limit is 100 meters (328 feet) for 802.3af, at and bt. Reolink reports that cameras with heavy power draw can brown out at night beyond about 50 to 60 meters on some cables.
Do I need a special cable for PoE?
No special type, but quality matters. Cat 5e or Cat 6 solid copper cable works, and copper-clad aluminum is best avoided because of its higher resistance.
Whichever way you go, take a photo of every cable route and label both ends. Two years later, when a camera drops out, you will be glad to know which wire goes where.
Who checked this
True Security Gear does not run a test lab and does not take units apart. One half of the work is documents: manufacturer specs, certifications, and seller claims checked against the paperwork. The other half is the record owners leave behind, in verified-buyer reviews, owner forums, and warranty complaints. Where that evidence is thin we say it is thin, rather than filling the gap with an adjective. The criteria are on How we evaluate.
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