| 摘要 |
A heat reshapeable rigid conduit and method for forming an elbow or offset having any desired bend radius therefrom. The rigid conduit is formed of a flexible metal tubing with a layer of heat softenable plastic preferably covering the exterior surface thereof. The conduit may be heated using conventional electric heaters on the job site, then shaped into the desired bend radius to form an elbow or offset. The plastic layer provides rigidity to the elbow or offset upon cooling. The flexible metal tubing has interlocking overlapping joined edges that permit flexing of the tubing when the plastic layer is heat softened. The flexible metal tubing resists the sawing action of a pulling line during the installation of an electrical conductor in the conduit. The plastic outer layer permits quick and inexpensive coupling between adjacent conduit sections. The heat reshapeable rigid conduit may be formed by extruding a plastic coating on the exterior of the flexible tubing, or may be formed by frictionally fitting a length of flexible metal tubing inside a length of plastic tubing. A section of the rigid conduit may also be heated and extended to correct for any error in measurement or cutting.
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