Conduit bends of ten times the conduit diameter must exist for which type of cable sheath?

Conduit bends of ten times the conduit diameter must exist for which type of cable sheath?

• A. Coaxial cables
• B. Cable sheaths consisting partly of steel tape
• C. Fiber-optic cables
• D. Metalized shielded cable

Answer: (B)

Bend radius matters: the stiffer the cable construction, the larger the bend you must make to avoid damage. When a cable sheath includes steel tape armor, the armor is relatively rigid and can kink or compress if bent too sharply. Because of that, standards require a bend radius of about ten times the conduit diameter to keep the armor intact, preserve shielding, and reduce stress on the insulation and conductors. Other cable types—such as coaxial, fiber-optic, or shields that aren’t steel-tape armored—do not rely on this specific high-radius rule and have their own allowable bend requirements based on their construction and sensitivity.

Bend radius matters: the stiffer the cable construction, the larger the bend you must make to avoid damage. When a cable sheath includes steel tape armor, the armor is relatively rigid and can kink or compress if bent too sharply. Because of that, standards require a bend radius of about ten times the conduit diameter to keep the armor intact, preserve shielding, and reduce stress on the insulation and conductors. Other cable types—such as coaxial, fiber-optic, or shields that aren’t steel-tape armored—do not rely on this specific high-radius rule and have their own allowable bend requirements based on their construction and sensitivity.