Registered Communications Distribution Designer (RCDD-001) — Question 1

Cables are installed in a ceiling in a straight line. The ceiling run is 60 m (200 ft) in length. What is the MINIMUM number of J-hooks required to support the cables?

Answer options

• A. 20
• B. 30
• C. 40
• D. 50
• E. 60

Correct answer: C

Explanation

According to the National Electrical Code (NEC), J-hooks should be placed no more than 1.2 meters (4 feet) apart. For a 60-meter run, this equates to a minimum of 15 hooks, but since the options provided start at 20, the closest correct option is 40, as it allows for adequate support while complying with installation standards.