Why Flat Ethernet Cables Can Be a Problem: Signal Quality, Durability, and More

Ethernet cables are a foundational component of any network infrastructure, providing reliable and efficient data transmission. However, not all Ethernet cables are created equal. Flat Ethernet cables, while sometimes convenient, come with a range of drawbacks that make them less ideal than their round counterparts. In this article, we will explore the reasons why flat Ethernet cables might not be the best choice in many scenarios, focusing on signal quality, durability, and other factors.

Signal Quality

Signal quality is a critical factor in determining the performance of any Ethernet cable. Flat Ethernet cables can be more susceptible to electromagnetic interference (EMI) and crosstalk. Unlike round cables, which ensure effective separation of twisted pairs, the design of flat cables can lead to less effective shielding and separation of the twisted pairs. This can result in signal degradation, especially over longer distances or in environments with a high level of interference.

Interference and Crosstalk

Interference and crosstalk are common issues in network installations. While both flat and round cables can handle similar distances (up to 100 meters for standard Ethernet), flat cables may struggle to maintain signal quality over longer runs or in environments with a high level of electromagnetic interference. High-quality flat cables can mitigate some of these issues, but they often fall short compared to their round counterparts in terms of signal integrity.

Durability

Durability is another significant factor to consider when choosing Ethernet cables. Flat cables are generally less durable than round cables due to their design. They can be more easily damaged by bending or folding, which can lead to breaks in the internal wiring. These breaks can result in connectivity issues, making it difficult to maintain a stable network connection.

Physical Damage and Breakage

The physical nature of flat cables can make them more prone to damage in installations where there are tight spaces or corners to navigate. For example, in data centers or server rooms, where cable management is critical, flat cables may not flex as easily as round cables, leading to increased risk of damage and potential network disruptions.

Physical Layout and Routing

Physical layout and routing are important considerations in network installations. Flat cables can be challenging to route in tight spaces or around corners due to their rigid nature. This can be problematic in scenarios where cable management is crucial, such as in data centers, server rooms, or even in residential installations with confined spaces.

Aesthetic Issues

Aesthetically, flat cables may not look as neat or professional in some settings, especially when cables are visible. While this is not a technical disadvantage, it can impact the overall appearance and professional standard of the installation.

Avoiding Permanent Damage

Flat Ethernet cables are particularly susceptible to damage from kinking and bending. Unlike water, which can be easily repaired, an Ethernet cable can suffer permanent damage when kinked. A kink can cause a 'reflection' of the signal, leading to packet loss and other issues. Even if the cable is flattened back out, the wire inside is already damaged, and the reflection issue will persist.

Conclusion

While flat Ethernet cables can be convenient for certain applications, especially in tight spaces or for temporary setups, they may not perform as well as round cables in terms of signal quality, durability, and overall reliability. If possible, it is advisable to opt for round Ethernet cables, which can better withstand the rigors of installation and provide a more reliable performance.