Every fiber optic splice closure leaves our Ningbo factory after passing mechanical, environmental and sealing tests in our own QC lab. We follow IEC 60794-1, IEC 61300 and Telcordia GR-771 methods — no outsourcing of routine testing.
A splice closure is the only sealed joint between two fiber cables in an outdoor network. If it leaks, the whole feeder segment goes dark. For Latin American deployments — coastal humidity, Andean temperature swings, dusty rural poles, underground manholes — the closure must survive 20+ years of abuse.
Relying only on supplier-type approvals is not enough. We run 100% routine inspection on every batch and sample-level full-environmental testing before mass production. Our lab is directly on the factory floor, so engineering, tooling and QC are in the same building — when a test fails, we fix the mold the same week.
Standard: IEC 60794-1-2 / GR-771. Sample closure is subjected to guided-drop impacts from 1 m height on concrete, repeated at multiple angles (lid, side, bottom). After impact, no crack on housing and sealing must still hold.
Why it matters: Covers drops during installation on aerial poles and accidental impact by tools or falling branches.
Standard: IEC 61300-2-10 Method A. Completed closure (with cable stub) is dropped 75 cm at (45±2)°C once onto a steel plate. Post-test air-pressure decay must stay within spec — no seal break.
Why it matters: Simulates a technician dropping the closure from a ladder during aerial FTTH work.
Standard: IEC 60794-1 Method E1. Closure is pulled axially with ≥800 N for 1 minute on each cable port. No cable slip out of the seal, no fiber attenuation increase.
Why it matters: Aerial closures hang under tension; a slipped cable = 2 km of dark fiber.
Standard: IEC 60794-1-2 Method E3. Closure is compressed at 2000 N / 100 mm for 1 minute. No permanent deformation; post-test sealing and fiber routing must stay intact.
Why it matters: Underground closures are under soil pressure; aerial closures get hit by traffic or construction.
Standard: IEC 60068-2-6 / IEC 61300-2-1. Frequency sweep 10–500 Hz, up to 3g acceleration, 3 orthogonal axes. Post-vibration: no loose parts, no seal leak, attenuation stable.
Why it matters: Covers wind-induced pole sway, vehicle vibration near duct routes, and ongoing micro-motion in aerial installations.
Standard: IEC 60068-2-52. 5% NaCl solution, 35°C, continuous spray for 48–96 hours. Post-test: no corrosion on metal hardware (stainless clamps, brackets), sealing still holds.
Why it matters: Critical for coastal Chile, Peru and Brazil — salt air destroys unprotected metal parts within a year.
Method: Closure is pressurized with dry air (typically 10 kPa or 50 kPa) and submerged in a water tank for 24 hours, or immersed under 1 m water column. No bubbles, no pressure drop.
Why it matters: The #1 field failure mode of buried/underground closures is water ingress after monsoon rain. We pressure-test every batch.
Standard: IEC 60068-2-14. Closure cycles between -40°C and +65°C (or -10 to +60°C per customer spec) for multiple cycles, with controlled humidity. No housing deformation, seal remains elastic.
Why it matters: Andean deployments (Bolivia, Peru highlands) see -10°C at night and +40°C daytime; desert areas swing even wider.
Method: Sealed closure placed in a dust chamber with talcum powder for 8 hours under vacuum. Opening the lid afterward must show zero dust inside on the splice trays.
Why it matters: Manhole and rural aerial environments are dusty; dust on splice trays causes attenuation drift over years.
Method: Outdoor-grade PC/PP closure samples are exposed to UV weathering chamber for 500+ hours. Post-test: housing does not become brittle, color change ΔE below 3.
Why it matters: White or black outdoor housings degrade under tropical sun; we verify UV stabilizer loading before we approve a batch for coastal/desert shipping.
Finished splice trays are measured on an EXFO OTDR at 1310 / 1550 nm. Each splice point must show < 0.05 dB fusion loss; return loss consistent with clean SC/APC polishing.
Caliper check on outer dimensions, port count, tray stacking; visual check for molding defects, flash, discoloration, missing labels. AQL 1.5 per ISO 2859.
| Standard | Scope |
|---|---|
| IEC 60794-1-2 | Optical fiber cable — basic optical cable test procedures (mechanical / environmental) |
| IEC 61300-2-10 / 2-1 | Fiber optic interconnecting devices — drop, vibration tests |
| IEC 60068-2-52 / 2-6 / 2-14 | Salt spray, vibration, thermal cycling |
| Telcordia GR-771 | Generic requirements for closures in outside plant |
| YD/T 814 / GD/J 105 | China telecom industry method for fiber optic splice closures |
For distributor tenders, operator certification and project submissions, we can provide:
Tell us which SKU you need and which standards your tender requires — we will send the matching report within 24 hours.