Under the telecommunications pathway standard, what is the most bending allowed in a conduit run between pull points?
- One 90-degree bend (90 degrees total)
- Three 90-degree bends (270 degrees total)
- Four 90-degree bends (360 degrees total)
- Two 90-degree bends (180 degrees total)
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D. Two 90-degree bends (180 degrees total)
Telecommunications conduit is limited to the equivalent of two 90-degree bends between pull boxes so that cable can be pulled without exceeding its tension limit. Four quarter bends (360 degrees) is the general limit in the electrical code for power raceways, and it is too many for data cable.
Reference: ANSI/TIA-569, conduit pathways
Under the telecommunications pathway standard, what is the longest conduit section allowed between pull points?
- 15 m (50 ft)
- 45 m (150 ft)
- 30 m (100 ft)
- 90 m (295 ft)
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C. 30 m (100 ft)
A telecommunications conduit section should be no longer than 30 m between pull points. 90 m is the limit on the horizontal cable itself, not on a conduit section.
Reference: ANSI/TIA-569, conduit pathways
When three or more cables are installed in a conduit, what is the maximum percentage of the conduit's cross-section they may fill?
- 40 percent
- 31 percent
- 53 percent
- 60 percent
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A. 40 percent
Three or more cables may fill 40 percent of the raceway area. 53 percent applies to a single cable and 31 percent to exactly two cables.
Reference: NEC 2023, Chapter 9, Table 1; ANSI/TIA-569