Coaxial Cable for Internet: Best Type, Speed Limits & Installation Guide

When it comes to home or business internet connections, coaxial cables are still a widely used and reliable option. They are particularly common for cable internet services, connecting modems to internet service providers (ISPs). Despite the rise of fiber optics, coaxial cables remain popular due to their affordability, ease of installation, and compatibility with existing cable infrastructure.

This guide explores the types of coaxial cables, speed capabilities, and practical installation tips to help you choose the best option for your network setup.

What Is a Coaxial Cable?

A coaxial cable, often called coax, is a type of electrical cable with a unique layered structure designed to transmit high-frequency signals with minimal interference. Its construction typically includes:

• Inner conductor: Carries the signal, usually made of copper or copper-clad aluminum.
• Dielectric insulator: Surrounds the inner conductor, maintaining spacing and preventing signal loss.
• Outer conductor (shield): Typically a metallic braid or foil that blocks external interference (EMI).
• Outer jacket: Protects the cable from environmental damage.

The coaxial design allows it to transmit data over long distances while maintaining signal integrity, which is why it’s commonly used for internet, TV, and CCTV systems.

Types of Coaxial Cables for Internet

Coaxial cables come in various types, each suited for different applications. Choosing the right type can impact your internet speed and reliability.

RG6 Coaxial Cable

• Overview: RG6 is the most widely used cable for internet and cable TV.
• Bandwidth & Speed: Supports up to 1 Gbps under ideal conditions.
• Features: Thick dielectric, better shielding against interference, and longer transmission range compared to older RG59 cables.
• Use Case: Cable internet modems, digital TV, and satellite installations.

RG59 Coaxial Cable

• Overview: RG59 is an older type of coaxial cable.
• Bandwidth & Speed: Typically suitable for lower-speed internet and short-distance TV signals.
• Features: Thinner core and less shielding than RG6, making it more susceptible to interference.
• Use Case: Short cable runs or older installations. Not recommended for high-speed internet.
  

RG11 Coaxial Cable

• Overview: RG11 is a thicker cable designed for long-distance transmission.
• Bandwidth & Speed: Can support higher speeds over longer distances (up to 2 Gbps for some applications).
• Features: Superior shielding and thicker core reduce signal loss over long cable runs.
• Use Case: Long cable runs between street cabinets and buildings or in large commercial installations.
  

Best Coaxial Cable for Internet

For most home and small office setups, RG6 coaxial cable is considered the best option. Its combination of affordability, performance, and widespread availability makes it ideal for delivering high-speed internet reliably.

If your installation requires longer runs or high-bandwidth applications, RG11 may be preferable. Avoid RG59 for modern high-speed internet unless you have very short distances and light usage.

Internet Speed Limits Over Coaxial Cables

Coaxial cables can handle a wide range of speeds depending on the cable type, quality, and length:

Factors affecting speed include interference from electrical devices, splitters in the line, and the quality of connectors. Proper shielding and using high-quality coaxial cables can reduce signal loss and maintain reliable internet performance.

Coaxial Cable Installation Guide

Installing coaxial cables correctly is crucial for optimal performance. Here’s a step-by-step guide:

1. Plan Your Cable Route

• Determine the starting point (modem/router) and ending point (wall outlet or device).
• Avoid running cables near power lines or fluorescent lights to reduce interference.
• Measure the distance and allow extra length for bends and future adjustments.
  

2. Select the Right Cable Type

• RG6 for most home internet setups.
• RG11 for long distances or high-speed enterprise connections.
  

3. Prepare the Cable

• Strip the outer jacket carefully without damaging the shielding.
• Fold back the braided shield to expose the inner conductor.
• Ensure the inner conductor is straight and undamaged.
  

4. Attach Connectors

• Use F-type connectors for most internet modems and cable boxes.
• Crimp or twist-on connectors based on your cable type.
• Make sure the connection is tight to prevent signal loss.
  

5. Run the Cable

• Secure the cable along walls or baseboards using clips or cable ties.
• Avoid tight bends, sharp turns, or crushing the cable under furniture.
• Leave a little slack near connectors to avoid tension.
  

6. Test the Connection

• Connect the cable to your modem or device.
• Test internet speed and stability.
• If performance is low, check for loose connections, splitters, or interference sources.
  

Tips for Maintaining Coaxial Cable Performance

1. Use Quality Cables: Higher-quality shielding and construction reduce signal loss.
2. Minimize Splitters: Each splitter reduces signal strength; keep them to a minimum.
3. Replace Old Cables: Cables degrade over time, especially RG59 or damaged RG6.
4. Keep Away from EMI Sources: Avoid running cables alongside large electrical appliances or fluorescent lights.

Conclusion

Coaxial cables remain a reliable solution for internet connectivity, offering a balance of affordability, performance, and ease of installation. RG6 is the best choice for most home and office networks, while RG11 is suitable for long-distance and high-speed applications. By understanding cable types, speed limits, and proper installation practices, you can ensure a fast and stable internet connection for years to come.