Described is a riser that is secured against downward movement, having an electrical riser flat cable that extends vertically or with a vertical component, and at least one riser securing device, surrounding the flat cable, for securing the riser flat cable against downward movement by pressing the flat cable against a nonconductive pressing surface both in the absence of a fire and in the event of fire. The riser securing device includes an electrically nonconductive, fire-resistant clamping element, spaced apart from the pressing surface, that is freely movably guided in an oblique guide that reduces the distance of the clamping element from the pressing surface during downward movement of the clamping element. When a downward tensile force acts on the flat cable, the flat cable is pressable against the pressing surface by the clamping element that is freely movable in the oblique guide and thus variable in its distance from the pressing surface, even when there is a change in the cable thickness, and is thus clampable between the clamping element and the pressing surface. The variability in spacing of the clamp corresponds at least to the difference between the thickness of the flat cable in the intact state and the thickness of the flat cable in the state of melted or burnt-off cable insulation.