What is the maximum length of permanently installed UTP cable for data as per structured cabling standards?

The maximum length of permanently installed Unshielded Twisted Pair (UTP) cable for data, as specified by structured cabling standards, is 90 meters. This measurement refers specifically to the horizontal cabling segment, which is the cable run from the telecommunications room to the work area outlet. The 90-meter limit is crucial for maintaining signal integrity and ensuring reliable transmission performance. Beyond this length, attenuation and other signal degradation issues can negatively impact data transmission quality.

The remaining options represent lengths that would exceed the industry recommendations, potentially leading to issues such as increased crosstalk, reduced bandwidth, and overall poorer network performance. Adhering to the 90-meter maximum ensures that installed cabling meets the necessary performance standards, providing a robust foundation for network infrastructure in a commercial setting.