What Is a LAN Cable? Types, Categories & Selection Guide

A LAN cable connects devices across a Local Area Network and provides the physical pathway for Ethernet data transmission. In modern structured cabling, the term usually refers to balanced twisted-pair copper cables such as Cat 5e, Cat 6, Cat 6A, Cat 7 and Cat 7A.

However, selecting the right cable involves much more than choosing the highest category number. Network speed, transmission distance, electromagnetic interference, Power over Ethernet, jacket material, fire requirements and the physical installation route all affect the correct cable construction.

For example, Cat 5e can still provide reliable Gigabit Ethernet where 1 GbE meets the network requirement. Cat 6 adds additional transmission margin, while Cat 6A supports 10GBASE-T across a conventional 100-meter structured-cabling channel. Cat 7 and Cat 7A provide higher-frequency, highly screened architectures for projects that require additional transmission and electromagnetic-performance margins.

Therefore, the best LAN cable is not automatically the cable with the highest category number. It is the cable that matches the complete network and installation requirement.

ETK Kablo manufactures a broad range of Data/LAN cables for enterprise networks, data centers, industrial Ethernet, smart buildings, outdoor infrastructure and other professional structured-cabling applications.

Quick answer: Choose Cat 5e when Gigabit Ethernet meets the project requirement. Consider Cat 6 when you want additional transmission headroom for professional LAN infrastructure. Select Cat 6A when the network requires 10 Gigabit Ethernet over full conventional channel distances. Evaluate Cat 7 or Cat 7A when the project requires highly screened Class F or Class FA cabling and greater high-frequency performance. Then choose the shielding, jacket and mechanical construction according to the actual installation environment.

What Is a LAN Cable?

A LAN cable is a network cable that connects devices within a Local Area Network. Typical connected equipment includes computers, network switches, routers, servers, wireless access points, IP cameras, building-management devices and industrial controllers.

Most professional copper LAN cables contain four twisted pairs, giving a total of eight insulated copper conductors.

The four-pair balanced construction allows the cable to transmit Ethernet signals while controlling unwanted electromagnetic coupling and crosstalk.

Depending on the design, the cable may also contain:

• An internal separator
• Individual pair foils
• An overall foil screen
• An overall copper braid
• A drain or earthing conductor
• PVC, LSZH/LSOH or PE outer jacket
• Steel wire armour or steel wire braid
• Messenger wire for aerial installation

Consequently, two cables in the same Ethernet category can have very different physical constructions.

LAN Cable vs Data Cable vs Ethernet Cable

The terms LAN cable, data cable and Ethernet cable often overlap, but they do not mean exactly the same thing.

Term	Typical Meaning
Data cable	Broad term for a cable that carries digital information
LAN cable	Cable used to connect equipment within a Local Area Network
Ethernet cable	Cable used to carry Ethernet network signals
Structured cabling cable	Installation cable used as part of a standardized building or campus cabling system

In commercial structured cabling, buyers often use these terms interchangeably when referring to Category-rated twisted-pair copper cables.

However, “data cable” remains the broader term. Fiber optic cable, for example, also carries data but does not belong to the same balanced copper cable architecture.

For this guide, LAN cable primarily refers to Category-rated copper Ethernet installation cable.

How Does a LAN Cable Work?

A copper LAN cable transmits electrical signals across balanced pairs of conductors.

Each pair uses a controlled twist geometry. The twisting helps the pair maintain electrical balance and reduces unwanted electromagnetic coupling.

Different pairs normally use different twist rates. This approach helps control interaction between adjacent pairs inside the same cable.

At higher Ethernet frequencies, cable design becomes increasingly demanding. Manufacturers must control parameters such as:

• Insertion loss
• Near-end crosstalk (NEXT)
• Power-sum NEXT
• Equal-level far-end crosstalk
• Return loss
• Characteristic impedance
• Propagation delay
• Resistance and resistance unbalance

Therefore, an Ethernet cable is not simply eight copper wires inside a jacket. Pair geometry, conductor dimensions, insulation, screening and manufacturing consistency all contribute to transmission performance.

LAN Cable Categories: Cat 5e, Cat 6, Cat 6A, Cat 7 and Cat 7A

Category	Standardized Frequency	Typical Ethernet Application	Typical Selection Direction
Cat 3	16 MHz	Legacy communication and older low-speed networks	Legacy or specialized applications
Cat 5e	100 MHz	1000BASE-T Gigabit Ethernet	Cost-efficient general LAN networks
Cat 6	250 MHz	1 GbE at conventional channel lengths; 10 GbE over shorter links under applicable conditions	Professional enterprise and commercial networks
Cat 6A	500 MHz	10GBASE-T up to 100 m channel	Enterprise, data center and future-ready LAN
Cat 7	600 MHz	10 GbE / Class F	Highly screened networks and demanding EMI environments
Cat 7A	1000 MHz	10 GbE / Class FA with greater frequency headroom	Advanced screened structured cabling

Frequency in MHz and network speed in Gbps describe different characteristics. A cable with twice the standardized frequency does not automatically deliver twice the Ethernet data rate.

This distinction becomes particularly important when comparing Cat 6A, Cat 7 and Cat 7A.

For a detailed category-by-category analysis, see our Cat6 vs Cat6A vs Cat7 vs Cat7A comparison.

Cat 5e LAN Cable

Cat 5e cable operates through 100 MHz and remains a practical solution for Gigabit Ethernet networks.

Typical applications include offices, commercial buildings, IP surveillance, VoIP, Wi-Fi access points and general Ethernet infrastructure.

Cat 5e remains technically relevant when 1 GbE provides sufficient bandwidth. Therefore, projects should not reject it simply because newer categories exist.

Cat 6 LAN Cable

Cat 6 cable increases category performance to 250 MHz and provides greater crosstalk margin than Cat 5e.

It commonly supports Gigabit Ethernet over conventional structured-cabling distances. In addition, suitable Cat 6 installations can support 10GBASE-T over shorter distances, subject to channel conditions and alien-crosstalk performance.

For many new office, commercial and industrial networks, Cat 6 provides a practical balance between transmission performance, cable size and project cost.

Cat 6A LAN Cable

Cat 6A cable extends category performance to 500 MHz and supports 10GBASE-T across a full conventional 100-meter structured-cabling channel when the complete system meets the applicable requirements.

As a result, Cat 6A has become an important option for enterprise networks, data centers, Wi-Fi infrastructure, server environments and high-bandwidth commercial systems.

However, Cat 6A itself does not define the screening architecture. U/UTP, U/FTP, F/FTP and S/FTP constructions can all exist within Category 6A.

Data-center projects can compare these architectures in our Cat6A cable for data centers guide.

Cat 7 LAN Cable

Cat 7 cable corresponds to ISO/IEC Class F structured cabling and provides standardized performance through 600 MHz.

Cat 7 normally uses a highly screened construction such as S/FTP. Individual foil screens isolate the pairs while an overall braid adds another electromagnetic barrier.

This architecture makes Cat 7 particularly attractive for industrial, high-density or electrically demanding network environments.

Cat 7 belongs primarily to ISO/IEC and EN structured-cabling frameworks rather than conventional ANSI/TIA category recognition. Therefore, project specifications should identify the applicable cabling standard instead of relying only on the category name.

Cat 7A LAN Cable

Cat 7A cable corresponds to Class FA performance through 1000 MHz.

It provides greater high-frequency transmission headroom than Cat 7 and normally uses comprehensive S/FTP screening.

Cat 7A supports 10 Gigabit Ethernet in suitable structured cabling systems. However, the 1000 MHz rating should not be interpreted as a separate standardized 40 Gigabit Ethernet capability for conventional LAN channels.

Instead, Cat 7A mainly provides additional frequency margin, shielding performance and Class FA capability for demanding cabling systems.

LAN Cable Shielding: U/UTP, F/UTP, U/FTP, F/FTP and S/FTP

Category and shielding describe different parts of a cable specification.

For example, two Cat 6A cables can provide the same Category 6A transmission class while using completely different screen architectures.

Construction	Overall Screen	Individual Pair Screen
U/UTP	None	None
F/UTP	Foil	None
S/UTP	Braid	None
SF/UTP	Foil + braid	None
U/FTP	None	Foil around each pair
F/FTP	Foil	Foil around each pair
S/FTP	Braid	Foil around each pair

When Is U/UTP Appropriate?

U/UTP uses no metallic screen. Instead, controlled pair geometry provides the electrical balance required for the applicable cable category.

It can provide an efficient solution in offices, commercial buildings and other controlled electromagnetic environments.

Because U/UTP does not contain metallic screening, it can also offer advantages in diameter, weight, flexibility and termination simplicity.

When Should You Use a Shielded LAN Cable?

A screened cable can provide additional protection where the route encounters significant electromagnetic interference.

Common EMI sources include:

• Variable-frequency drives
• Industrial motors
• Power distribution equipment
• Transformers
• Switchgear
• High-current power cables
• Power conversion equipment

Nevertheless, shielding should solve a real engineering requirement. Adding maximum screening to every network does not automatically improve the project.

Furthermore, shielded cabling works as a complete system. Compatible connectors, patch panels, correct shield continuity and an appropriate bonding strategy all contribute to final performance.

What Is the Best LAN Cable Jacket: PVC, LSZH or PE?

Ethernet category does not determine the outer jacket material.

A Cat 6 or Cat 6A cable, for example, can use different jackets depending on the installation environment.

Jacket	Typical Selection Direction
PVC	General indoor installations where PVC is permitted
LSZH / LSOH	Projects requiring low-smoke and halogen-free material characteristics
PE	Outdoor-oriented Ethernet routes

PVC LAN Cable

PVC remains a widely used cable material because it can provide useful flexibility, mechanical durability and cost efficiency.

Therefore, PVC can remain an appropriate solution in many offices, industrial facilities and protected technical environments when the project permits it.

LSZH / LSOH LAN Cable

LSZH cable uses low-smoke, halogen-free materials for projects where smoke and acidic combustion gases create additional concerns.

Typical applications include data centers, public buildings, transport infrastructure and other enclosed or safety-sensitive environments.

However, LSZH does not automatically mean fire resistant. It also does not automatically define a CPR Euroclass.

For a detailed material comparison, see our LSZH vs PVC cable guide.

PE Outdoor LAN Cable

Polyethylene jackets provide a practical option for outdoor-oriented Ethernet infrastructure because PE offers strong resistance to moisture and environmental exposure.

Typical applications include outdoor Wi-Fi, external CCTV, campus links and industrial network routes.

Nevertheless, a PE jacket alone does not make every cable suitable for every outdoor installation. UV exposure, water, mechanical risk, building-entry rules and installation method still require separate evaluation.

Indoor, Outdoor, Aerial and Armored LAN Cable

The physical route can matter just as much as Ethernet performance.

A standard indoor LAN cable may perform perfectly inside a protected office pathway yet fail to address the mechanical and environmental conditions of an industrial outdoor route.

Indoor LAN Cable

Indoor structured cabling usually prioritizes transmission performance, fire requirements, pathway capacity and installation efficiency.

PVC or LSZH jackets may apply depending on the project specification and local regulations.

Outdoor LAN Cable

Outdoor network routes require suitable environmental protection. Therefore, designers should review UV exposure, water, temperature and jacket material.

Aerial Ethernet Cable

Aerial installation adds mechanical loading that conventional indoor cable does not encounter.

Dedicated aerial cable may use a messenger or another support system to carry span loads. Consequently, buyers should not treat standard PE-jacketed outdoor cable as automatically suitable for pole-to-pole installation.

Armored Ethernet Cable

Industrial and infrastructure routes can expose network cables to impact, crushing, rodents and maintenance activity.

In these cases, an armored construction can provide additional mechanical protection.

Importantly, armour and electrical shielding serve different functions. A foil or copper braid mainly addresses electromagnetic performance. SWA or SWB primarily adds mechanical protection.

For more detail, see our armored vs unarmored cable guide.

How Long Can a LAN Cable Be?

Many conventional balanced copper Ethernet structured-cabling systems use a maximum 100-meter channel architecture.

A common configuration includes:

• Up to 90 meters of permanent-link installation cable
• Patch and equipment cords completing the channel

However, the supported Ethernet application still depends on the cable category.

For example, Cat 5e supports Gigabit Ethernet over a conventional compliant channel. Cat 6A supports 10GBASE-T across the full conventional 100-meter channel. Cat 6 can support 10GBASE-T over shorter links under suitable installation conditions.

Therefore, simply extending a copper cable beyond the applicable system limit is not good network design.

For longer distances, designers can add active network equipment or consider fiber optic cabling.

Can a LAN Cable Carry Power over Ethernet?

Yes. Power over Ethernet allows compatible network systems to carry data and electrical power across the same balanced copper cabling.

PoE commonly powers equipment such as:

• Wireless access points
• IP cameras
• VoIP telephones
• Access-control devices
• Building automation equipment
• IoT devices

However, PoE introduces additional cable-selection criteria because electrical current generates heat in copper conductors.

For PoE-intensive projects, review:

• Conductor size
• DC resistance
• Resistance unbalance
• Cable bundle size
• Ambient temperature
• Number of energized pairs
• Pathway ventilation
• Connector compatibility
• Required PoE power level

Consequently, buyers should not assume that every cable in one Ethernet category behaves identically under high remote-power loading.

LAN Cable for Data Centers

Data centers place additional demands on copper network cabling because they combine high transmission rates with dense pathways and large cable bundles.

Cat 6A forms an important copper option where the architecture uses 10GBASE-T and RJ45 connectivity.

In addition, cable designers must consider:

• Alien crosstalk
• Cable outside diameter
• Rack density
• Pathway fill
• PoE thermal loading
• Screening architecture
• Grounding and bonding
• Fire requirements

As a result, U/FTP, F/FTP and S/FTP can all make sense in different data-center environments.

Our Cat6A data center cable comparison examines these shielding structures in detail.

LAN Cable for Industrial Ethernet

Industrial Ethernet combines network transmission requirements with environmental and mechanical challenges that conventional office networks may never encounter.

A factory or process plant can expose a LAN cable to:

• High electromagnetic interference
• Mechanical impact
• Vibration
• Oil or chemicals
• Moisture
• UV exposure
• Temperature variation
• Outdoor routes

Therefore, an industrial network specification should combine Ethernet category with appropriate shielding, jacket and mechanical protection.

Our industrial Ethernet cable selection guide covers these environments in greater depth.

LAN Cable for Offices and Smart Buildings

Office and smart-building networks can carry much more than desktop Ethernet.

The same structured cabling infrastructure can support:

• Computers
• Wi-Fi access points
• IP telephones
• IP cameras
• Access-control systems
• Building-management equipment
• Digital signage
• IoT devices

Cat 6 often provides a practical solution for general enterprise networks. Meanwhile, Cat 6A can offer greater long-term capacity where the building expects 10GBASE-T, higher Wi-Fi backhaul requirements or a longer cabling lifecycle.

Therefore, designers should consider both current traffic and future network upgrades.

Does a Higher LAN Cable Category Always Mean a Better Network?

No.

A higher category can provide additional bandwidth and transmission margin, but the complete channel still controls actual network performance.

The installed channel includes more than the bulk cable:

• Patch panels
• Keystone jacks
• Connectors
• Patch cords
• Termination quality
• Cable routing
• Installation workmanship

Installing Cat 6A cable with lower-performing or incorrectly installed components does not automatically create a compliant Cat 6A channel.

Likewise, selecting Cat 7A for a basic Gigabit office network may add cost and installation complexity without creating a meaningful operational benefit.

LAN Cable Standards

Professional structured cabling should follow the standards that apply to the project and market.

Common reference families include:

• ISO/IEC 11801 structured cabling
• EN 50173 structured cabling
• ANSI/TIA-568 structured cabling
• IEC 61156 balanced communication cable standards
• IEEE 802.3 Ethernet application standards

ISO describes ISO/IEC 11801-1 as a generic cabling framework that supports services including voice, data and video and can also incorporate power delivery.

Nevertheless, buyers should specify the required standard and edition rather than writing only “Ethernet cable.”

Cat 5e, Cat 6 and Cat 6A appear widely across ISO/IEC and ANSI/TIA frameworks. Cat 7 and Cat 7A primarily belong to ISO/IEC and EN Class F / Class FA structured-cabling systems.

How to Choose the Right LAN Cable

A structured selection process prevents both under-specification and unnecessary over-specification.

1. Define the Required Ethernet Speed

Start with the network application.

If 1 GbE meets the requirement, Cat 5e or Cat 6 may provide sufficient capacity. If the network requires 10GBASE-T over a full conventional copper channel, Cat 6A becomes the key reference point.

2. Check the Transmission Distance

Do not select category without reviewing link length.

For example, Cat 6 and Cat 6A have different 10GBASE-T distance capabilities.

3. Evaluate Electromagnetic Interference

A standard office may not need comprehensive metallic shielding.

By contrast, an industrial route near motors, drives or power equipment may benefit significantly from F/UTP, U/FTP, F/FTP or S/FTP.

4. Define the Installation Environment

Specify whether the route is indoor, outdoor, aerial, underground, in conduit, on an industrial tray or mechanically exposed.

5. Select the Jacket Material

Choose PVC, LSZH/LSOH or PE according to fire strategy and environmental requirements.

6. Review PoE Requirements

High-power PoE can make conductor resistance, bundle temperature and conductor size more important.

7. Determine Mechanical Protection

Add SWA, SWB or another reinforcement only when the route actually requires additional mechanical protection.

8. Verify the Complete Channel

Finally, ensure that connectors, patch panels, patch cords and installation workmanship support the required system performance.

What Should a LAN Cable RFQ Include?

A professional RFQ should contain more information than “Cat 6 Ethernet cable.”

Consider specifying:

• Required Ethernet category
• Network application and speed
• U/UTP, F/UTP, S/UTP, SF/UTP, U/FTP, F/FTP or S/FTP
• Solid copper conductor requirement
• Required AWG or conductor diameter
• Maximum DC resistance
• PVC, LSZH/LSOH or PE jacket
• Indoor, outdoor or aerial installation
• SWA, SWB or other mechanical protection where required
• PoE requirement
• Maximum cable outside diameter
• Operating temperature
• Applicable ISO/IEC, EN or ANSI/TIA standard
• CPR Euroclass where applicable
• Permanent-link or channel testing requirement
• Packaging length
• Cable marking
• Test certificates and documentation

This information allows manufacturers and suppliers to quote the same technical construction and makes commercial comparisons more meaningful.

ETK Kablo LAN Cable Solutions

ETK Kablo manufactures copper Data/LAN cables for professional structured cabling, enterprise networks, data centers, industrial networks, smart buildings and telecommunications infrastructure.

The portfolio includes Cat 5e, Cat 6, Cat 6A, Cat 7 and Cat 7A constructions.

Depending on the category, ETK Kablo offers unshielded, foil-screened, braid-screened and individually screened cable architectures.

Projects can also select different outer materials and mechanical constructions, including PVC, LSOH/LSZH, PE, aerial designs, Steel Wire Armour and Steel Wire Braid in applicable product families.

This range allows project engineers, distributors, contractors and system integrators to specify the cable according to the complete network environment instead of relying on category alone.

Frequently Asked Questions

What is a LAN cable?

A LAN cable connects network equipment within a Local Area Network. In professional copper structured cabling, the term usually refers to Category-rated twisted-pair Ethernet cable.

Is a LAN cable the same as an Ethernet cable?

The terms are commonly used interchangeably for twisted-pair network cabling. However, LAN describes the network environment while Ethernet describes the communication technology.

What is the difference between Cat 5e and Cat 6?

Cat 5e provides category performance through 100 MHz and supports Gigabit Ethernet. Cat 6 extends category performance to 250 MHz and provides additional transmission and crosstalk margin.

What is the difference between Cat 6 and Cat 6A?

Cat 6A operates through 500 MHz and supports 10GBASE-T across a conventional 100-meter structured-cabling channel. Cat 6 provides lower category bandwidth and supports 10GBASE-T only over shorter links under appropriate conditions.

Is Cat 7 faster than Cat 6A?

Cat 7 provides higher standardized frequency performance and stronger typical shielding, but both Cat 6A and Cat 7 can support 10GBASE-T across suitable 100-meter channels. Higher MHz does not automatically mean a higher Ethernet data rate.

Does Cat 7A support 40 Gbps?

Cat 7A should primarily be specified as a 1000 MHz Class FA cabling category. Its higher frequency rating does not automatically create a standardized 40GBASE-T LAN application over conventional Category 7A channels.

What is U/UTP cable?

U/UTP has no overall metallic screen and no individual pair screens. It relies on balanced twisted-pair geometry to control signal interaction.

What is F/UTP cable?

F/UTP uses one overall foil screen around four unshielded twisted pairs.

What is U/FTP cable?

U/FTP has no overall metallic screen but individually foil-screens each twisted pair.

What is S/FTP cable?

S/FTP individually foil-screens each pair and adds an overall metallic braid around the complete cable core.

Can LAN cable carry PoE?

Yes. Suitable structured cabling can carry Ethernet data and compatible Power over Ethernet. However, designers must consider conductor resistance, temperature, bundle size and the required PoE power level.

How far can Ethernet cable run?

Many conventional balanced copper structured-cabling applications use a maximum 100-meter channel. The supported Ethernet speed within that distance depends on the cable category and complete installed system.

Which LAN cable should I use for 10 Gigabit Ethernet?

Cat 6A is designed for 10GBASE-T across a full conventional 100-meter structured-cabling channel. Cat 7 and Cat 7A can also support 10 GbE in suitable Class F and Class FA systems.

Should I use shielded or unshielded Ethernet cable?

Choose according to the electromagnetic environment. U/UTP can work well in controlled office environments, while screened constructions can provide additional protection in high-EMI or high-density installations.

Is LSZH LAN cable better than PVC?

Neither material is universally better. LSZH provides benefits where low smoke and reduced halogen-related combustion gases matter. PVC remains practical where the project permits it and values flexibility, durability or cost efficiency.

Can LAN cable be installed outdoors?

Yes, but use a construction designed for the outdoor environment. The cable may require PE jacket, UV resistance, water protection and additional mechanical protection depending on the route.

Is armored LAN cable better?

Armour provides extra mechanical protection but also increases diameter, weight and stiffness. Use it when the installation route creates a real physical risk.

Conclusion: Which LAN Cable Should You Choose?

A LAN cable forms the physical foundation of a copper Ethernet network, but category alone does not define the complete solution.

Cat 5e remains relevant for Gigabit Ethernet. Cat 6 provides additional transmission margin for modern structured networks. Cat 6A supports 10GBASE-T across conventional 100-meter channels, while Cat 7 and Cat 7A provide higher-frequency and highly screened Class F and Class FA architectures for demanding applications.

After selecting the category, evaluate the shielding architecture. U/UTP, F/UTP, U/FTP, F/FTP and S/FTP address different electromagnetic and installation requirements.

Next, choose the jacket and physical protection according to the route. PVC, LSZH/LSOH and PE solve different environmental and fire-related requirements, while SWA or SWB add mechanical protection where the cable faces physical risk.

Finally, verify PoE requirements, transmission distance, complete channel hardware, applicable standards and installation quality.

The correct approach is therefore not to select the highest Ethernet category available. Define the network application first, then specify the cable construction that delivers the required transmission, environmental and mechanical performance without unnecessary over-engineering.