How to choose the right network cable for yourself?
Wire type selection simple approach: First, consider bandwidth requirements → distance → usage environment, then choose category, and whether to use shielding.
I. Step 1: Determine network speed requirements (most crucial)
Note: The bottleneck is often not the network cable, but the router / optical modem. For example, if your home only has gigabit broadband, there is no need to buy seven-category or eight-category cables.
Home gigabit broadband (most common)
Recommendation: Super five-category CAT5e or six-category CAT6
CAT5e: The most cost-effective, can run at full gigabit speed, sufficient for ordinary internet, TV, and surveillance
CAT6: Has more margin, suitable for NAS, large file transfer for multiple devices, and reserved for upgrading to 10-gigabit internal network
Not recommended: Five-category CAT5 (maximum 100 Mbps, outdated and obsolete)
10-gigabit internal network (NAS high-speed copying, 10-gigabit switch)
Short distance < 55 meters: CAT6 can run 10-gigabit
55 - 100 meters: To achieve stable 10-gigabit speed, CAT6A is necessary
> 100 meters: Twisted-pair network cables are not enough, use fiber + optical module
Tip: 100 meters is the theoretical limit. Poor-quality cables will actually shrink. Long distances should preferably choose brand pure copper.
II. Step 2: Look at wiring distance
≤ 55 meters: CAT6 can run 10-gigabit
55 - 100 meters: To achieve stable 10-gigabit speed, CAT6A is necessary
> 100 meters: Twisted-pair network cables are not enough, use fiber + optical module
Note: 100 meters is the theoretical limit. Poor-quality cables will actually shrink. Long distances should preferably choose brand pure copper.
III. Step 3: Environment → Choose shielded / unshielded, indoor / outdoor
How to choose shielded STP / unshielded UTP? Unshielded UTP (most common for home and ordinary office)
Construction is simple and cheap. It is sufficient for normal indoor environments. No strong interference, no need for shielding.
Shielded STP
Suitable for: factories, close to wires / frequency converters, machine rooms, scenarios with strong electromagnetic interference
Unshielded UTP (most commonly chosen for most homes and ordinary offices)
Construction is simple and cheap. It is sufficient for normal indoor environments. No strong interference, no need for shielding.
Indoor cables vs Outdoor cables
Indoor ordinary network cables: Can only be used indoors, cannot be exposed to sunlight or rain
Outdoor wiring (on the exterior wall, on the outdoor pole): Outdoor water-resistant network cables (with PE waterproof outer skin, some with Kevlar anti-tensile), ordinary network cables will crack and get wet after being exposed outdoors for a few months.
IV. Step 4: Material (key to avoiding pitfalls! Many network cable pitfalls are here)
Priority: oxygen-free copper, followed by copper-clad copper; Avoid copper-clad aluminum, copper-clad steel:
Copper-clad aluminum: High resistance, severe signal attenuation over long distances, PoE monitoring is prone to unstable power supply, short lifespan
Simple differentiation: Oxygen-free copper network cables feel soft, the copper core color is reddish; Copper-clad aluminum is white and hard
V. Quick selection comparison table (direct application)
Table
Usage scenarios Recommended network cables
For ordinary home gigabit broadband, IPTV, and regular cameras CAT5e (oxygen-free copper UTP)
For home NAS, full-house wiring, and wanting to reserve 10 Gigabit connection CAT6 (oxygen-free copper UTP)
For surveillance with PoE, indoor wiring CAT5e / CAT6 oxygen-free copper
For outdoor surveillance, exterior wiring CAT5e/CAT6 outdoor water-resistant oxygen-free copper
For factories, strong electromagnetic environment CAT6 STP shielded
For 10 Gigabit internal network, within a distance of approximately 100 meters CAT6A
VI. Common Misconceptions Reminder
It is not the case that the higher the category, the better: Buying category 7 or 8 cables for home gigabit broadband is a waste. Most category 7 cables are shielded cables, and it is difficult to achieve good grounding in home decoration.
"Category 7 connectors" have many advantages, but ordinary household CAT6 is sufficient.
Network cables are part of the entire system: The optical modem, router, switch, and connectors all need to be matched. Changing the network cable alone cannot increase the speed.
You can tell me these 3 pieces of information, and I will directly help you determine the model:
1) Purpose (home internet / NAS / surveillance?)
2) Approximate length of the network cable
3) Indoor or outdoor, is there any strong wire nearby?
