Cable Installation Techniques Flashcards

What is the maximum pulling tension allowed for a 4-pair UTP Category 6 cable during installation?

Answer: 25 lbf (110 N)

TIA-568 limits pulling tension for 4-pair UTP cable to 25 lbf (110 N) to prevent damage to cable geometry and electrical performance.

When installing cable through a fire-rated wall penetration, which material must be used to restore the fire rating?

Answer: Firestop sealant or putty pad

Approved firestop sealant or putty pad must be used to restore the fire-resistance rating of any wall or floor penetration per NEC and building codes.

What is the minimum bend radius for a Category 6A UTP cable during and after installation?

Answer: 8 times the cable diameter

TIA-568 requires a minimum bend radius of 8 times the cable outer diameter for Cat 6A UTP to maintain signal integrity.

Which tool is used to dress down and secure cable pairs into a 110-style punch-down block?

Answer: 110 punch-down tool

A 110 punch-down tool (impact tool with a 110 blade) seats each conductor into the IDC contact and trims the excess wire in one motion.

When routing cables in a cable tray, what is the maximum fill ratio recommended by ANSI/NEMA standards?

Answer: 50%

ANSI/NEMA VE 2 recommends a maximum fill of 50% of the cable tray cross-sectional area to allow heat dissipation and future cable additions.

Which cable installation practice helps prevent excessive attenuation caused by improper cable management?

Answer: Avoiding kinks, knots, and excessive bends

Avoiding kinks, knots, and sharp bends preserves the cable's twist geometry and keeps signal attenuation within specification.

What does the term 'home run' describe in structured cabling installation?

Answer: A direct cable run from each outlet to the telecommunications room

A home run is a dedicated, uninterrupted cable path from each individual work area outlet directly back to the telecommunications room, which is required by TIA-568.