Showing posts with label Direct Burial Cable. Show all posts
Showing posts with label Direct Burial Cable. Show all posts

Sunday, November 7, 2010

Great video on terminating Fiber Optic cable ready for Direct Burial

This video walks through tips on preparing direct-burial cables for installation. It was produced by the Fiber Optic Association — the same standards body behind the CFOT certification — so the techniques apply equally to direct-burial fiber-optic and armored copper runs. Direct-burial armored cables are well suited to underground installations without conduit. The trade-off is the armor itself, which can be tricky to strip cleanly. The walkthrough below shows a couple of time-saving techniques. Two extra tips beyond what the video covers:
  • Run a tracer wire alongside any non-metallic direct-burial run — a 12 or 14 AWG copper conductor (insulated, color-coded per local utility convention) terminated at both ends to a marker post. Makes the cable findable years later when no one remembers where it went.
  • Bed the run in clean sand or fine soil. Sharp rock against the jacket is the slow-failure mode that nobody plans for. NEC Article 300.5 covers minimum burial depths (18 inches for direct-burial UF, 24 inches under driveways) — verify the local AHJ requirement before backfill.
The full fiber-optic catalog at Ramcorp, including direct-burial-rated runs, is here. Tracer wire and direct-burial copper are available through Ramcorp Wire & Cable.