1. Scope
Requirements for fusion splicing workmanship, splice protection, and the assembly and sealing of splice closures.
2. Normative requirements
2.1 Field splices shall use fusion splicing; mechanical splices are permitted only for temporary restoration and shall be logged for replacement.
2.2 Individual splice loss shall not exceed 0.10 dB (machine estimate, confirmed by OTDR where Tier 2 applies); ribbon mass-fusion average ≤0.15 dB per fiber. Any splice above limit shall be remade before closure sealing.
2.3 Cleave angle shall not exceed 2°. Cleaver blades and splicer electrodes shall be maintained on a logged schedule; arc calibration performed at each day's start and after environment changes.
2.4 Heat-shrink protection sleeves shall be centered and fully recovered; fibers routed in trays at ≥30 mm bend radius with tube slack secured.
2.5 Closures shall be assembled per manufacturer procedure: seals torqued or shrunk to specification, desiccant fitted where specified, and pressure/flash testing performed where the design provides valves.
2.6 Tube-to-tray mapping and per-fiber destinations shall be recorded in the splice matrix per FOI-S-006 before the closure is sealed.
3. Acceptance criteria
A closure is accepted when all splice values meet 2.2, the closure passes its seal verification, and the splice matrix is complete and delivered.