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Fiber Optic Installation Safety

Fiber Optic Installation Safety. Ch 11 Fiber Optics Technician’s Manual, 3 rd . Ed Jim Hayes. Bare Fiber Safety. If the shards get into your skin, you will have to wait for them to work out Wear eye protection! Put shards on sticky tape Account for all shards. Eye Safety (Laser Damage).

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Fiber Optic Installation Safety

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  1. Fiber Optic Installation Safety Ch 11 Fiber Optics Technician’s Manual, 3rd. Ed Jim Hayes

  2. Bare Fiber Safety • If the shards get into your skin, you will have to wait for them to work out • Wear eye protection! • Put shards on sticky tape • Account for all shards

  3. Eye Safety (Laser Damage) • Most sources are low-power and no great risk • High power sources might burn the retina with invisible light • Images from tsogalveston.com and chppm-www.apgea.army.mil (Links Ch 11c-e)

  4. Eye Safety Rules • Never look into the end of a cable that might be in use • Cap unused connectors • Tape unterminated fiber ends • Mark enclosures with warning labels • Laser test sources are dangerous, don’t leave them lying around

  5. Chemical Safety • MSDS: Material Safety Data Sheet – a document that lists the risks of a chemical • Alcohol – flammable • Adhesives – irritate skin, require ventilation • Index matching gel – irritate eyes • Silicone adhesives like RTV are used as mechanical sealant – can irritate skin or eyes

  6. UV Light Sources • Used to cure some adhesives • Harmful to eyes • Causes skin cancer

  7. Canned Compressed Air • Can explode if heated or damaged • Some use flammable propellant

  8. Gas in Manholes • There may be no oxygen in the hole • Working Alone – test the space first • Working as a Crew • One worker in the hole, wearing a harness • One above hole • Image from cpchem.com (Link Ch 11a)

  9. Tools and Equipment • Step Ladders • Don’t stand on top step • Must be in good repair • Extension Ladders • Must reach three feet beyond bearing point • Angle: 1 foot of spacing for every 3 or 4 feet of height

  10. Tools and Equipment • Knives • Hook blade is most common • Cut away from yourself • Syringes and Needles • They are blunt and not a medical hazard • Microscopes • Use a power meter first to make sure there is no light coming out of the fiber

  11. Tools and Equipment • Cable Installation Equipment • Trenchers, backhoes, boring machines • Obvious big-equipment hazards • Toolbox • Have a container for spare knife blades • Prevent liquid spills, battery shorts, etc.

  12. Personal Safety Equipment • Gloves protect you from • Corrugated armor sheaths • Fiberglass splinters • Safety Glasses

  13. Safe Working Area • Enough table space • Good Lighting • Don’t eat or drink in work area • Prevent falls – loose cables, open holes • Clean work area after you are done, properly dispose of all shards

  14. Safe Working Area • Aerial Installation Hazards • Ladder safety • Electric power lines • Weather • Employee Training

  15. Planning the Installation Ch 12 Fiber Optics Technician’s Manual, 3rd. Ed Jim Hayes

  16. Why is Planning Necessary? • Construction is not repetitive • Each job is different • By the time you perfect your procedure, it’s time for the next job • You must avoid mistakes through planning

  17. Measuring for Conduit Pulls • Avoid unneeded splices – they lose signal and cost time and money • Measuring from prints • Inaccurate, so you waste cable • With a Wheel On-Site • Much more accurate • Measurement/Pull Tape • Most accurate

  18. Measuring Wheel • Image from englo.ee • (link Ch 11g)

  19. Measurement/Pull Tape • Image from arncocorp.com (Link Ch 11f)

  20. Extra Length • Leave 7 to 10 feet extra for termination • Access or repair coils are needed • Michigan State U. required 30 feet extra cable in conduit at each termination point (link Ch 11h) • Allow 1% extra length outside • Allow 5% - 7% extra length inside

  21. Splicing • Fusion splicing cannot be done in manholes • So 30 feet slack needed on each side of the splice (60 feet extra cable) • Mechanical splices can be done in manholes • Only 10 feet of extra cable needed

  22. Efficient Pulling • If a pull is too long, the tension will grow too high • Break up the pull with figure-eighting in locations with enough room • Don’t leave reels of cable unprotected • Cable can cost thousands of dollars

  23. Duct Space • Large ducts are divided by innerduct • Protects the fiber cable • Reduces friction • Image from store.cablesplususa.com (link Ch 11i)

  24. Initial Planning Walkout • Project Engineer • Knows customer’s needs • Lead Technician • An experienced fiber installer • Project Superintendent • Must coordinate activities of workers • All obstacles should be found and planned for, so crews don’t sit idle waiting during the job

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