Riser, installation kit, and electrical installation
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.
1. A riser that is secured against downward movement, comprising:
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 in the absence of a fire and in the event of fire, wherein 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 a distance of the clamping element from the pressing surface during downward movement of the clamping element; and
wherein 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 cable thickness, and is thus clampable between the clamping element and the pressing surface, wherein the variability in spacing of the clamp corresponds at least to a difference between the thickness of the flat cable in an intact state and the thickness of the flat cable in a state of melted or burnt-off cable insulation.
2. The riser according to claim 1 , wherein the clamping element is designed as a clamping roller.
3. The riser according to claim 2 , wherein the clamping element is designed as a one-part clamping roller.
4. The riser according to claim 2 , wherein the clamping element is designed as a multi-part clamping roller,
wherein the multi-part clamping roller includes multiple adjacently situated, independent single clamping rollers lined up in a row on an axis.
5. The riser according to claim 2 , wherein the riser includes a retaining device having a screw lock, wherein the screw lock in the direction of the oblique guide, in which the clamping roller is guided in a variably spaced and freely movable manner, in a closed state limits deflection of the clamping roller in an upward direction.
6. The riser according to claim 2 , wherein the riser securing device includes a retaining device having a cable tie, wherein by means of the cable tie, during installation of the riser securing device on the riser, the clamping element is held in a topmost position of the oblique guide.
7. The riser according to claim 2 , wherein the riser securing device includes a retaining device having a suspension mechanism, adjoining the oblique guide above same, in which the axis of the clamping roller is suspendable in a position above the oblique guide.
8. The riser according to claim 1 , wherein the clamping element is designed as an eccentric clamping element.
9. The riser according to claim 8 , wherein the eccentric clamping element is designed as a multi-part eccentric clamping element that includes multiple adjacently situated, independent eccentric single clamping elements.
10. The riser according to claim 8 , wherein the eccentric clamping element is rotationally movable with infinite variability about the axis of the clamping element fastened to a retaining device, wherein the axis of the clamping element is mounted at a fixed position in the retaining device.
11. The riser according to claim 2 , wherein the riser securing device includes a nonconductive, fire-resistant base plate.
12. The riser according to claim 2 , wherein the riser securing device includes a nonconductive, fire-resistant anti-twist protector that is mounted on a profile rail, wherein a fastening device has a hook formation for suspension in the profile rail.
13. An installation kit having at least one riser according to claim 1 and at least one riser flat cable.
14. An electrical installation, including 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, according to claim 1 , wherein
(i) the riser securing device is mounted on a building wall that forms the insulating pressing surface as a counterpart to the clamping element, or
(ii) the riser securing device is equipped with an insulating pressing surface, as a counterpart to the clamping element, that forms a part of the riser securing device itself.