What is the minimum bend radius for backbone cable expressed as a multiple of the cable diameter?

What is the minimum bend radius for backbone cable expressed as a multiple of the cable diameter?

• A. Five times the diameter of the cable
• B. Ten times the diameter of the cable
• C. Fifteen times the diameter
• D. Two times the diameter

Answer: (B)

A bend radius is the smallest curve a cable can be bent without risking damage or performance loss. For backbone cable, the guideline is to keep the bend radius at ten times the cable diameter. This spacing helps prevent excessive stress on the jacket and conductors, which can cause microbends and higher attenuation, especially in longer or tight runs. So if the cable diameter is D, the bend should be at least 10D. Smaller bends, like five times or two times the diameter, would stress the cable too much and degrade performance. A larger bend, such as fifteen times the diameter, is more conservative but not the minimum required.

A bend radius is the smallest curve a cable can be bent without risking damage or performance loss. For backbone cable, the guideline is to keep the bend radius at ten times the cable diameter. This spacing helps prevent excessive stress on the jacket and conductors, which can cause microbends and higher attenuation, especially in longer or tight runs. So if the cable diameter is D, the bend should be at least 10D.

Smaller bends, like five times or two times the diameter, would stress the cable too much and degrade performance. A larger bend, such as fifteen times the diameter, is more conservative but not the minimum required.