Safety, Codes, Standards, and Job Documentation
Laser and optical safety
Treat every fiber as live. Never look into a fiber or connector, and never use an ordinary magnifier to inspect an energized fiber - invisible IR light at 1310/1550 nm will not trigger the blink reflex and can cause permanent retinal damage. Use an IR viewing card or a scope designed for the purpose, disconnect both ends before inspecting, and cap unused ports. Systems are typically Class 1 when intact, but an unterminated connector or broken fiber can emit hazardous power.
Physical and chemical hazards
Bare fiber fragments are glass needles: use a sharps container and a designated work mat, and wear safety glasses. Isopropyl alcohol is flammable - no open flame, adequate ventilation, and eye/skin protection. Follow ladder, confined space, lockout/tagout, and PPE requirements.
Codes and standards
The NEC Article 770 governs optical fiber cables and raceways; 300.22 governs air-handling spaces. Key TIA documents: TIA-568 (cabling and performance), TIA-569 (pathways and spaces), TIA-606 (administration/labeling), TIA-607 (grounding and bonding), TIA-598 (fiber color code). Firestop systems must be listed (ASTM E814/UL 1479), and the AHJ has the final say.
Documentation
The closeout package normally includes as-built drawings, cable and fiber schedules, labeling records per TIA-606, test reports, splice loss records, warranty/installation certificates, and photographs of firestopped penetrations. Incomplete documentation is the most common reason a completed job fails acceptance.
Rule of thumb
Fiber color sequence: 1 blue, 2 orange, 3 green, 4 brown, 5 slate, 6 white, 7 red, 8 black, 9 yellow, 10 violet, 11 rose, 12 aqua.
Trap
Questions claim fiber is "safe because there is no electricity." The correct answer accounts for laser radiation, glass shards, chemicals, and the fact that a conductive-element cable still carries electrical considerations.