Abstract: A junction box connector and resulting assembly are disclosed that facilitate the inclusion of a strain wire. The strain wire relieves the load placed upon the cable or flexible conduit and cable combination that extends between the junction box and another similar connection. In a preferred embodiment, a connector that has a section extending inside the junction box is provided with a longitudinal slit, and the strain wire is placed within this slit. A locking device such as a threaded nut presses the wire down against the side of the junction box, creating a mechanical clamping effect, thereby providing an appropriate connection able to resist loads placed upon the structure. Preferably, the present invention is used with flexible conduit and the flexible conduit encapsulates an integral strain wire. In certain embodiments, the flexible conduit is filled with fire resistant material and marked with standard units of length.

Abstract: A hose or pipe comprising a tubular layer formed by helically winding plastics material and/or rubber around a mandrel reinforced with a high tensile spring steel wire which is formed into a helix around and simultaneously with the winding of the tubular layer by positively driving the wire into engagement with coil-forming means, disposed around the tubular layer, which gives the wire a set and produces a wire helix having an internal diameter approximating the external diameter of the tubular layer, the wire being driven into the coil-forming means at a linear speed substantially equal to the speed of the surface of the helical path around the tubular layer against which the wire coil is to lie.