Hospital Wing Installation: Firestop, Tension, and Safety Violations
A crew is installing 60 CAT6A cables and a 12-strand OS2 fiber backbone from the main telecom room to a new hospital wing. The pathway includes a 1 in EMT sleeve through a 2-hour rated wall; the sleeve is not firestopped. CAT6A is being pulled with a motorized puller, and the tension meter reads 40 lbf; the cable manufacturer lists 25 lbf maximum. At one J-hook the cable bend radius is about 20 mm, and the cable outside diameter is 7.5 mm. The crew is working from a 10 ft stepladder in a busy corridor, with ceiling tiles removed and no barrier. Fiber scraps are being placed in a paper coffee cup. The electrical contractor asks whether the fiber can share the same J-hooks as the power conduit.
1. List the code, installation, and safety violations that require immediate correction.
Read the worked answer
Stop-work items: the 2-hour rated wall penetration has no listed firestop, which violates the fire-rated assembly and must be corrected before the area is closed. The CAT6A is being pulled at 40 lbf against a 25 lbf maximum, so the cable may be stretched and permanently damaged. The bend radius is about 20 mm, below the minimum 4 x OD = 30 mm for a 7.5 mm cable. The stepladder work in a busy corridor lacks a barrier and fall protection as required by site safety. Fiber scraps in an open coffee cup are a puncture and eye hazard. The proposed shared J-hooks with power conduit also need review before installation.
2. What installation corrections are needed for the cable pathway and fire-rated wall?
Read the worked answer
Use a listed firestop system for the 2-hour wall, installed per the manufacturer and inspected before concealment. Pull by hand or reduce the puller tension to stay below 25 lbf; use cable lubricant and larger sweeps if needed. Replace any cable that was pulled over tension or kinked. Maintain at least 4 x OD bend radius at J-hooks and sweeps and support the cable per manufacturer and code. Keep fiber and copper on separate supports from power; cross power at 90 degrees and maintain TIA-569 separation. Do not conceal any of this work until the firestop and cable condition are inspected.
3. How should fiber waste and ladder work be handled on this site?
Read the worked answer
Treat fiber scraps as sharps: use a closed, labeled container, not a cup, and keep it at the work location. Wear safety glasses when cleaving and handling fiber, and do not eat or drink in the work area. Use a barrier and cones around the ladder, and follow the site's fall-protection and ladder rules; do not work over a busy corridor without controlling the drop zone. Keep copper and fiber separate from power raceways and J-hooks. After the pull, inspect cable for jacket damage and test before termination. If the corridor cannot be closed safely, reschedule the work rather than improvising.