... impact resistant. 3.Anti-aging. lifetime up to 50years. plastic conduit pipe 1.resist compression and anti impact.2.fire-proof, ... so they can store well under ground4.insulation of the plastic conduit pipe . Pvc is not conductive which can prevent any ... internal wiring,protecting the wire under 1200v12).Effect for the plastic conduit pipe : After using,wiring easily and trimly,installing reliably,and ...