LEADING-THROUGH SYSTEM FOR CABLES AND MODULE

Abstract: The invention relates to a leading-through system for cables for leading cables (22) through fire compartmentation walls in after-installations. According to the system an opening is made in the wall and the cable is led therethrough. According to the invention a module (10) is mounted in the wall, the module is mounted in place while the leading-through cables (21) are sealed and there is a system for locating the cables formed on the surface of the module. The invention also relates to module having, formed on its surface, a system for locating the cables (22) which is made up of a grid (11) or a figure of another kind or recesses (11) formed for the cables. The system for locating the cables can be disposed on both sides of the module.

Description: LEADING-THROUGH SYSTEM FOR CABLES AND MODULE The invention relates to a leading-through system for cables for leading cables through fire compartmentation walls in after-installations, according to which system an opening is made in the wall and the cable is led therethrough. It is a common practice in after-installations that cables are led through walls in a random way through such part Of the wall where there seems to be enough space. In this case one cannot be certain whether there are cables or other obstacles on the other side of the wall. Also, breaking through the wall can be a problem due to the dust especially if there are sensitive equipment like computers nearby. A thin fire resistant board presents also a problem in that the cable must have an isolation extending far enough on both sides of the wall. This is due to the fire safety regulations and the fact that cables, in case of fire, act as a material which conducts heat through walls. It is known from prior art a kind of frame having pieces of silicon rubber for use in after-installation of cables. When a cable is led through such a frame the frame is dismantled and one rubber piece is removed. When the cable is installed in place the frame is re-assembled. In practice this method is very cumbersome. The object of this invention is to present a new leading- through system for cables by which leading-through of cables in after-installations can be performed effectively and systematically. The invention is characterized in that a module is mounted in the wall for use in later leading-through ins allations, which module is mounted in place while the leading-through cables are sealed and that there is a system for locating the cables formed on the surface of the module. According to the invention the system for locating cables is a grid or a figure of another kind formed on the surface of the module. It can also be made up of recesses formed on the surface of the module for the cables. According to one beneficial embodiment of the invention both sides of the module are provided with a similar system for locating cables. In this case the location of the cable to be led through is unambiguously defined on both sides. The invention also relates to a module for use in cable leading-through systems. According to the invention the surface of the module is provided with a system for locating cables. The system for locating cables is either a grid or a figure of another kind or is made up of recesses formed on the surface of the module for the cables. The system for locating cables can also be disposed on both sides of the module. According to one beneficial embodiment of the invention the system for locating cables formed on the surface of the module is made up of lined-up recesses formed in corresponding positions on both sides of the module forming a co-ordinate system defining the location of the cables. According to one further embodiment of the invention the thickness of the module corresponds to the required fire protection length of the cable and the thickness of the module between the recesses on both sides of the module corresponds to the required fire protection thickness when the cable is not installed. The invention will be further described by following examples referring to the enclosed figures in which Figure 1 shows a front view of the module according to the invention. Figure 2 shows a cross-section along the line II-II of figure 1. Figure 3 shows the module of figure 1 mounted on a cable rack forming a fire stop. Figure 4 shows a cross-section along the line IV-IV of figure 3. Figure 5 shows a cross-section along the line V-V of figure 3. Figure 1 shows a cable leading-through module 10 which is made of a material containing cement or gypsum. The module is provided with lined-up recesses 11 so that they form a grid. With the aid of this grid the location of each cable to be led through can be defined accurately. Figure 2 shows the cross-sectional view of the module of figure 1. It can be seen in the figure that corresponding to each recess 11 there is a similar recess on the opposite side of the module. The thickness of the wall 12 between these recesses is enough to form a fire stop in conformation with the regulations when there is no cable installed. The total thickness of the module 10 which is the wall 12 added with the depth of both recesses 11 corresponds to the length along which the cable to be led- though must be isolated. Figure 3 shows a leading-through module mounted in place. The figure shows a cable rack 20 having several cables 21 thereon. On top of these there is a leading-through module 10 for leading-through after installations and then the wall around the cable rack 20 and the module 10 is walled up to make a fire stop. Later, when it is necessary to install a new leading-through cable, it is possible to choose any position in the module 10. The figure shows the cable 22 which has been installed afterwards. The cable is led through within a recess as shown in the cross-section of figure 4. The leading-through operation is accomplished so that an opening wide enough for the cable 22 to go through is made in the wall 12 of the module 10. When the cable is in position the recesses around the cable 22 are filled with a filling compound 23 containing gypsum or cement. However, the leading-through operation can also be made at a point in the module wall which lies between the recesses 11. The cable 24 in figure 3 shows this kind of leading- through cable. In the cross-section shown in figure 5 it can be seen that the opening for the cable extends the whole width of the module 10. In this case, filling compound is needed only the amount necessary for making the leading-through cable tight. Also in the case that the leading-through is made at a position between the recesses, the location of the cable is accurately defined by means of the co-ordinate system of the recesses. It is obvious to a specialist in the field that the different embodiments can vary within the limits of the enclosed claims.

Claims: CLAIMS 1. Leading-through system for cables (24) for leading cables through fire compartmentation walls (10) in after- installations, according to which system an opening is made in the wall and the cable is led therethrough characterized in that a module (10) is mounted in the wall for use in later leading-through installations, which module (10) is mounted in place while the leading-through cables (21) are sealed and that there is a system (11) for locating the cables (24) formed on the surface of the module. 2. Leading-through system for cables according to claim 1 characterized in that the system for locating the cables (22) is a grid (11) or a figure of another kind formed on the surface of the module (10). 3. Leading-through system for cables according to claim 1 characterized in that the system for locating the cables (22) is made up of recesses (11) formed on the surface of the module (10) for the cables. 4. Leading-through system for cables according to claims 1, 2 or 3 characterized in that both sides of the module (10) are provided with a similar system (11) for locating the cables. 5. Module for the leading-through system characterized in that there is a system for locating the cables (22) formed on the surface of the module (10). 6. Module according to claim 5 characterized in that the system for locating the cables (22) is a grid (11) or a figure of another kind formed on the surface of the module (10). 7. Module according to claim 5 characterized in that the system for locating the cables (22) on the surface of the module (10) is made up of recesses (11) formed on the surface of the module (10) for the cables. 8. Module according to claim 5 characterized in that the system for locating the cables (22) formed on the surface of the module (10) is disposed on both sides of the module. 9. Module according to any of the claims 5-8 characterized in that the system for locating the cables (22) formed on the surface of the module (10) is made up of lined up recesses (11) formed in corresponding positions on both sides of the module, the recesses (11) forming a co¬ ordinate system defining the location of the cable. 10. Module according to any of the claims 5-8 characterized in that the thickness of the module (10) corresponds to the required fire protection length of the cable (22) and the thickness of the part (12) of the wall between the recesses (11) on both sides of the module corresponds to the required fire protection thickness when the cable is not installed.

Inventors: BJENNES BJARNE, BJENNES, BJARNE
Applicants: PALOKATKOMIEHET AB OY, OY PALOKATKOMIEHET AB
Application year: 1990
Main classification: H02G3
IPC codes: F16L5, H02G3