RCDD Cabling Infrastructure and Pathways 1 — Questions and Answers
Question 1: According to ANSI/TIA-568, what is the maximum horizontal cable run length for Category 6A copper cabling?
- 90 meters (Correct answer)
- 100 meters
- 110 meters
- 70 meters
Correct answer: 90 meters
ANSI/TIA-568 specifies a maximum permanent link (horizontal) length of 90 meters for copper cabling, with an additional 10 meters allowed for patch cords.
Question 2: What is the minimum bend radius for a 4-pair Category 6 UTP cable during installation?
- 4 times the cable diameter
- 8 times the cable diameter (Correct answer)
- 10 times the cable diameter
- 2 times the cable diameter
Correct answer: 8 times the cable diameter
ANSI/TIA-568 requires a minimum bend radius of 8 times the cable outer diameter for 4-pair UTP cables during installation.
Question 3: Which standard governs commercial building telecommunications pathways and spaces in the US?
- ANSI/TIA-569 (Correct answer)
- ANSI/TIA-568
- ANSI/TIA-606
- ANSI/TIA-607
Correct answer: ANSI/TIA-569
ANSI/TIA-569 is the standard for commercial building telecommunications pathways and spaces, covering conduit, cable trays, and equipment rooms.
Question 4: What is the maximum fill ratio for a conduit containing telecommunications cables according to ANSI/TIA-569?
- 53% (Correct answer)
- 40%
- 60%
- 25%
Correct answer: 53%
ANSI/TIA-569 specifies a maximum conduit fill ratio of 53% for a single cable, decreasing for multiple cables to ensure pull-through ease and cable protection.
Question 5: Which type of cable tray is recommended for areas where dust collection is a concern?
- Solid bottom tray
- Ladder-type tray
- Ventilated trough
- Wire mesh tray (Correct answer)
Correct answer: Wire mesh tray
Wire mesh cable trays (wire basket trays) are recommended in environments where dust collection is a concern because they allow airflow and are easy to clean.
Question 6: What minimum clearance must be maintained above a cable tray for maintenance access per ANSI/TIA-569?
- 300 mm (12 in) (Correct answer)
- 150 mm (6 in)
- 600 mm (24 in)
- 450 mm (18 in)
Correct answer: 300 mm (12 in)
ANSI/TIA-569 requires a minimum clearance of 300 mm (12 inches) above cable trays to allow for maintenance and future cable additions.
RCDD Cabling Infrastructure and Pathways 1
According to ANSI/TIA-568, what is the maximum horizontal cable run length for Category 6A copper cabling?