Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
A COVER FOR CABLE RACEWAYS
Document Type and Number:
WIPO Patent Application WO/2011/144258
Kind Code:
A1
Abstract:
The invention relates to a cover (1) for cable raceways (3) with a first side (11) and a second side (12) arranged on the opposite side of the first side (11) suitable to close a cable raceway (3) with the first side (11), wherein the cover (1) further comprises an open pocket (4) at least partly covering the second side (12) and shaped essentially parallel to the surface of the second side (12), wherein the pocket (4) is adapted to at least partly accommodate a flat conductor (2). This cover (1) enables providing of a cable raceway (3) suitable to separate cables on demand enabling a visual check of the presence of certain types of cables. The invention further relates to a cable raceway (3) comprising a cover (1) according to the present invention.

Inventors:
ARNDT, Karl-Heinz (Bonnerstr. 64a, Niederkassel, 53859, DE)
ESSER, Wolfgang (Aegidienberger Str. 66, Bad Honnef, 53604, DE)
Application Number:
EP2010/057079
Publication Date:
November 24, 2011
Filing Date:
May 21, 2010
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
EATON INDUSTRIES GMBH (Hein-Moeller-Straße 7-11, Bonn, 53115, DE)
ARNDT, Karl-Heinz (Bonnerstr. 64a, Niederkassel, 53859, DE)
ESSER, Wolfgang (Aegidienberger Str. 66, Bad Honnef, 53604, DE)
International Classes:
H02G3/04; H02G3/30
Foreign References:
GB2231912A
US6268566B1
DE4217267A1
Attorney, Agent or Firm:
LEADBETTER, Benedict (Eaton Industries Manufacturing GmbH, Patent Law DepartmentRoute de la Longeraie 7, 1110 Morges VD, CH)
Download PDF:
Claims:
Claims

1. A cover (1) for cable raceways (3) with a first side (11) and a second side (12) arranged on the opposite side of the first side (11) suitable to close a cable raceway (3) with the first side (11), wherein the cover (1) further comprises an open pocket (4) at least partly covering the second side (12) and shaped essentially parallel to the surface of the second side (12), wherein the pocket (4) is adapted to at least partly accommodate a flat conductor (2) .

2. The cover (1) as claimed in claim 1, characterized in that the cover (1) further comprises at least two snap-in and/or slide-in slots (13) suitable to be connected with corresponding snap-in and/or slide-in slots (33) of a cable raceway (3), preferably arranged at the first side (11) of the cover (1).

3. The cover (1) as claimed in claim 2, characterized in that the cover (1) further comprises at least one carrier means (5) connected to the snap-in and/or slide-in slots (13), where no cable raceway (3) is connected to, and suitable to be mounted to a mounting surface (7) to support the cover (1).

4. The cover (1) as claimed in claim 3, characterized in that the carrier means (5) is able to be telescoped (T) in order to adapt the height of the carrier means (5) to the distance between the cover (1) and the mounting surface (7).

5 The cover (1) as claimed in any of the preceding claims, characterized in that the pocket (4) is at least partly attached, preferably glued, on top of the surface of the second side (12).

6 The cover (1) as claimed in claim 5, characterized in that the pocket is attached to the cover by a double sided adhesive tape (6) either present on the pocket (4) or on the second side (12) of the cover (1).

7. The cover (1) as claimed in any of the preceding claims, characterized in that the pocket (4) is at least partly flexible. 8. The cover (1) as claimed in any of the preceding claims, characterized in that the pocket (4) comprises a fixation means (41) at the inner side of the pocket (44) to lock the flat conductor (2) in the pocket (4).

9. The cover (1) as claimed in claim 8, characterized in that the fixation means (41) is provided as at least one suitable shaped rib, preferably with a rounded tip.

10. The cover (1) as claimed in claim 9, characterized in that the suitable shape of the rip (41) is a shape essentially filling the area above the fixed link between adjacent wires of the flat conductor (2).

11. The cover (1) as claimed in claim 8, characterized in that the fixation means (41) are provided as parallel notches arranged on at least one inner side of the pocket (44) to retain the wires of the flat conductor (2), preferably arranged on surface of the second side (12) covered by the pocket (4).

12. The cover (1) as claimed in any preceding claim, characterized in that the flat conductor (2) is a Smart Wire Darwin cable.

13. The cover (1) as claimed in any preceding claim, characterized in that the surface (42) of the pocket (4) facing away from the second surface (12) of the cover (1) is a smooth surface.

14. The cover (1) as claimed in any preceding claim, characterized in that the pocket (4) is further suitable for carrying a sign (8) with a sign area exceeding the area of the cover (1) suitable to provide information and/or protection.

15. A cable raceway (3) comprising a cover (1) as claimed in claim 1.

Description:
A cover for cable raceways

Field of the invention

The invention relates to a cover suitable to close a cable raceway and to at least partly accommodate a flat conductor. The invention further relates to a cable raceway comprising such a cover.

Background of the invention

Cable raceways are used for enclosing and routing of electrical wiring. Cable raceways are commonly made of plastic and provide very good protection to enclosed conductors from impact, moisture and chemical vapors. Varying numbers, sizes, and types of conductors can be pulled into a cable raceway, which simplifies design and construction compared to multiple runs of cables or the expense of customized composite cable. Frequent wiring changes are made simpler and safer through the use of cable raceways, as existing conductors can be withdrawn and new conductors installed with little disruption along the path of the cable raceway. Many cable raceways accommodate electric cables, data cables, etc. or combinations thereof. These cables are operated at different voltages. To provide the same electrical insulation properties, the electrical insulation of the cables have to be adapted to the required properties in each cable raceway accommodating different types of cables, e.g. electric cables and data cables. Regulations under local laws may require electric cables to be segregated from other cables. Therefore, many cable raceways are divided internally to define separate compartments for the different types of cables. Document US 2010/0101855 Al discloses a cable raceway with two defined and separated compartments of equal size extending over the length of the cable raceway, where each compartment has a removable cover plate forming a wall of the cables raceway. Such a cable raceway is suitable to separate different cables from each other. However this cable raceway is a component with a large installation depth even if there is no necessity to separate cables from each other. Furthermore it is not possible to check the presence of certain cables, e.g. data cables, inside the raceway with a simple visual inspection due to the closed cover plates forming a wall of the cable raceway.

Summary of the invention

It is an object of the present invention to provide a cable raceway being in accordance with local regulations and enabling a visual check of the presence of certain types of cables.

The object is solved by a cover for a cable raceway with a first side and a second side arranged on the opposite side of the first side suitable to close a cable raceway with the first side, wherein the cover further comprises an open pocket at least partly covering the second side and shaped essentially parallel to the surface of the second side, wherein the pocket is adapted to at least partly accommodate a flat conductor. The term "flat conductor" denotes any kind of flat cables. As an example, a flat conductor may be a sheet-like conductor with one or more conducting paths. As another example a flat conductor may comprise many conducting wires running parallel to each other and attached to each other by small fixed links between adjacent wires. In another embodiment the flat conductor is a ribbon cable comprising multiple conducting wires. The flat conductor could be a flexible cable commonly in a wide and flat shape, also known as multi-wire planar cable. Flat conductors are commonly used for internal peripherals in computer or electrical cabinets. Flat conductors are also used for external connections as well. Flat conductors, e.g. ribbon cables, are usually specified by the spacing between the conductors (pitch) and the number of connectors (ways). As an example common pitches range between 1.27mm and 0.30mm. The number of ways differs from 4, 6, 8, 9, 10 ways up to 80 ways. Flat conductors are commonly insulated sufficiently for operating voltages up to 300V. In some areas in the world, this insulation is not sufficient for running this type of cable together with electric cables. As an example, also local specification (e.g. North America standards UL508A and NFPA79) specify insulation properties suitable for operating voltages up to 600V even for flat conductors operated at much lower voltages in case of cable raceways accommodating multiple cables comprising other electric cables, e.g. low voltage cables. The possibility to obey local regulations for raceways comprising multiple cables of different types as well as flat conductors by improving the insulation properties of the flat conductors is no favored option because it is too expensive and/or requires additional modifications for the flat conductors. Therefore, the present invention provides a cover to be connected to common cable raceways and a pocket providing a cavity inside the pocket adapted to the shape of flat conductors or part of flat conductors to run the flat conductors with the same cable raceway parallel to low voltages cables in accordance with local

specifications without any need for additional insulation of the flat conductor (e.g. no required isolating tube arranged around the flat conductor). The electrical insulation between or separation of low- voltage cables and flat conductors (for extra- low voltages) is provided by the cover with first and second side separating the electric cable (inside) and the flat conductor (outside). This enables the use of common flat conductors with common insulation properties and therefore enables a cheaper wiring of the connected devices. The cover made of plastic material and the separation of electric cables inside the cable raceway and the flat conductor on top of the second side of the cover provide a sufficient insulation. The first side of the cover denotes the side of the cover, which faces towards the cables inside a compartment provided by a bottom part when attached to the bottom part as the cover of the bottom part. This bottom part is denoted as cable raceway in the present invention. The other side of the cover denoted as second side of the cover accordingly faces away from the cable raceway after attaching the cover to the cable raceway. A raceway is denoted as cable raceway when carrying at least one cable inside the closed raceway or on its outer surface, here on the second side of the cover of the cable raceway. Cable raceways may denote any pipe-like means enclosing cables running inside the cavity established by the inner side of the raceway in order to protect cables from the environment and rout cables through installations, e.g. electrical cabinets or any other kind of electrical installations. The cable raceways may have any shape, for example a pipe-like shape with a circular, square or rectangular cross-section (or profile), preferably an extruded profile. In other embodiments, the cross-section may have other shapes within the scope of the present invention. The term pipe-like denotes three-dimensional means with a length significantly larger than the diameter of the means establishing an inner volume suitable to enclose cables arranged inside the inner volume. The term cable raceway is not limited to cable raceways made of a certain material. However the cover and/or the cable raceway are commonly made of PVC or other plastic material, preferably a certified material according to local specifications. The shaping of cover and/or cable raceway may be achieved by common molding, casting or extruding processes. The cover is attached to the cable raceway by any suitable technique, e.g. in a snug fit manner, with snap fits, spring locks, hooks or may be glued on top of the cable raceway. This mentioned techniques enable workers to attach the cover in a simple and fast process to the cable raceway. Skilled people may attach the cover to the cable raceway with another technique within the scope of this invention. The means to connect the cover to the cable raceway may be adapted to common counterparts present at the cable raceways on the market today to achieve a highest variability and usability of the cover. The length of the cover can be adapted to the present cable raceways to be closed with this cover by cutting the cover at the suitable length. In one embodiment the cable raceway is a wire duct, e.g. made of rigid-PVC with snap-off fingers establishing fence-like shaped side walls comprising cable hold-back noses at the side of the wire duct providing an ideal fit of the cover easy to be assembled.

The pocket for the flat conductor or at least parts of the flat conductor may have any suitable shape allowing inserting a flat conductor at least partly into the pocket.

Preferably, the thickness of the pocket (extension of the pocket vertical to the second surface of the cover) is adapted to the thickness of the part of flat conductor to be inserted into the pocket, which is the typically the diameter of a conducting wire of the flat conductor plus the thickness of the insulation around the conducting wire intended to be inserted into the pocket. Typical diameters of wires in ribbon cables as an example of flat conductors are 0.30 mm, 0.25 mm or 0.20 mm. The electrical insulation around the wires has typically the same thickness. Examples of pocket thicknesses are therefore 0.6 mm, 0.5 mm or 0.4 mm. In other embodiments with other flat conductors, skilled people may choose other pocket thicknesses within the scope of this invention. As an example, in case of cable raceways having a rectangular cross-section (or profile), the pocket may be shaped as a U-shaped pocket. Preferably the upper side of the pocket (part of the pocket facing away from the cover) is arranged parallel to the surface of the second side of the cover. In case of second sides of the cover with a curved profile between the edges of the cover to be attached to the cable raceway, the upper side of the pocket follows the curved shape of the second side. For any shapes of the cover, the pocket is arranged essentially parallel to the surface of the second side to provide a tight fit of the flat conductor inserted into the pocket. The term "essentially parallel" denotes a pocket, which upper side has a shape adapted to the shape of the second side of the cover providing a constant thickness of the pocket in accordance to the achievable process accuracy of the manufacturing process for the pockets. The term open pocket denotes a pocket with an open side or open slit required to insert a flat conductor into the inner side of the pocket, which encloses the cavity inside the pocket established by the second side of the cover and the upper side of the pocket and the part of the pocket connecting the upper side of the pocket and the second surface of the cover. The open pocket enables a fast visual check, whether a flat conductor is present or not in contrast to raceways according to prior art, where one or more covers fully encloses all cables.

In an embodiment the cover further comprises at least two snap-in and/or slide-in slots suitable to be connected with corresponding snap-in and/or slide-in slots of a cable raceway. The snap-in or slide-in slots will enable a fast and simple connection between cover and cable raceway. With snap-in or slide-in slots, the cover is able of being moved along the cable raceway to its desired position. In a preferred embodiment the snap-in and/or slide-in slots are arranged at the first side of the cover to provide a closure, where the cover encompasses the cable raceway providing a closure where the cover is supported by the walls of the cable raceway resulting in an improved robustness against pressure applied to the cover.

In a preferred embodiment the cover further comprises at least one carrier means connected to the snap-in and/or slide-in slots, where no cable raceway is connected to, and suitable to be mounted to a mounting surface to support the cover. Here the cover is supported even where no cable raceway is underneath the cover providing a robust support for the cover. Therefore, areas without cable raceways can be safety bridged with a cover equipped with a flat conductor avoiding any breakage of the flat conductor due to mechanical impacts at areas without cable raceway underneath the cover. In a preferred embodiment the carrier means is able to be telescoped in order to adapt the height of the carrier means to the distance between the cover and the mounting surface. This is advantageous in case of mounting surfaces having a three-dimensional contour, which shall not be followed by the cover. As an example the carrier means may comprise a telescoping element, e.g. a telescoping clip TC-RMQ from Eaton Industries known under the trademark Moeller, to adjust the distance between the mounting surface and the cover continuously variable.

In another embodiment the pocket is at least partly attached, preferably glued, on top of the surface of the second side of the cover. Here the pocket and the cover component comprising the second side of the cover are provided as separate components, where the cover in accordance with the present invention is established by attaching the pocket on top of the cover. This enables a fast selective mounting of the pocket to a cover at areas, where a flat conductor has to be laid (or installed). Pockets are only attached to the second side of the cover, where needed. Furthermore this enables to separate the manufacturing of pocket and the remaining cover component. The separated

manufacturing enables to provide either common covers or covers according to the present invention with the same manufacturing equipment for the cover component, where only the pocket has to be attached to provide a cover according to the present invention. Possible techniques to attach the pocket to the cover are for example gluing techniques, such as contact adhesive gluing (providing a high sheer resistance), hot melt gluing (thermoplastics applied in a molten form for ease of use and for a wide range of joinable materials) or reactive adhesive gluing (applying e.g. acrylics, urethanes, epoxies or polyimides), welding techniques or mechanical techniques such as screwing or riveting. In a preferred embodiment the pocket is attached to the cover by a double sided adhesive tape either present on the pocket or on the second side of the cover enabling the shipment of pocket and cover separately and the simple gluing on demand at the location of installing the cable raceway. Suitable double-sided adhesive tapes are on the market today, e.g. Tesa tape. In an embodiment the pocket is at least partly flexible, as an example made of PVC or plastic. A flexible pocket makes it easier to insert a flat conductor into the pocket without damaging the flat conductor or the insulation of the flat conductor. Furthermore the flexible pocket can be used for flat conductors having different thicknesses. The term "flexible" includes the possibility to bend the upper side of the pocket away from the second side of the cover in order to increase the thickness of the pocket, e.g. when thicker flat conductors have to be inserted into the pocket.

In another embodiment the pocket comprises a fixation means at the inner side of the pocket to lock the flat conductor. The inner side of the pocket denotes the side of the pocket facing towards an inserted flat conductor. The fixation means could be arranged on either the second side of the cover or the upper side of the pocket or both sides. A fixed flat conductor cannot slip outside the pocket accidentally, e.g. during mounting the cover to the raceway or during re-arrangement of parts of the installed raceway, and therefore the protection of the flat conductor will be maintained. The fixation means to lock the flat conductor may be any suitable means to fix the flat conductor in a certain position after inserting the flat conductor into the pocket. Preferably the fixation means is provided as at least one suitable shaped rib. Such a rib enables to move for instance the fixed ribbon cable as an example of the flat conductor parallel to the rip after inserting the flat conductor into the pocket. To avoid any mechanical damage of the ribbon cable and/or its electrical insulation during these movements the rip has a rounded tip.

In a further preferred embodiment the suitable shape of the rip is a shape essentially filling the area above the fixed link between adjacent wires of the flat conductor. With such a rip, the fixation of the flat conductor to the cover is improved.

In an alternative embodiment the fixation means are provided as parallel notches arranged on at least one inner side (second side of the cover and/or upper side of the pocket) of the pocket to retain the wires of the flat conductor. The notches may have any suitable shape to provide a fixation (= to retain) to the flat conductor, e.g. V-shaped cavities. However, notches with s shape adapted to the shape of the wires of the flat conductor will provide the tightest fixation for the flat conductor, e.g. notches shaped as half-cylindrical cavities. In a preferred embodiment the notches are arranged on the surface of the second side covered by the pocket. It is even more preferred when the area of the second surface provided with notches extends the area covered by the pocket to provide a guiding for all conductive wires of the flat conductor on top of the cover.

All the fixation means described previously enables an inserting of the flat conductor into the pocket either manually or with common tools and provides the possibility to move / slide the flat conductor along the cover. It is possible to feed a flat conductor into a pocket at the end of the cover and shift the flat conductor along the pocket to bridge areas of the cover, which might be not accessible for workers due to equipment installed above / around the cover or in case of covers installed in installations not easily accessible. The fixation means provide a guiding for the flat conductor during moving / shifting the flat conductor along the cover necessary to prevent the flat conductor slipping outside the pocket, which is especially important in case of shifting the flat conductor along manually non-accessible parts of the cover. A slipped-out flat conductor could not be inserted manually again into the pocket of the cover at such areas. In another embodiment the flat conductor is a SmartWire Darwin cable for SmartWire Darwin installations of Eaton Industries. Smart Wire Darwin cables are operated at voltages up to 30V (extra-low voltages) isolated with a material providing insulation up to 300 V. The SmartWire Darwin cable is an 8-pole cable with arrows printed on top indicating the direction from gateway to bus.

In another embodiment the surface of the pocket facing away from the second surface (= upper side of the pocket) of the cover is a smooth surface to be able to carry text information. A smooth surface enables the printing of information, which is a cheap, fast and variable technology.

In another embodiment the pocket is further suitable for carrying a sign with a sign area exceeding the area of the cover suitable to provide information and/or protection to workers and/or equipment. There might be parts of the cover not equipped with flat conductors (empty pocket) or there might be parts of the cover, where an additional empty pocket is glued to the second surface. These pockets or certain sections (part) of pockets might carry signs instead of flat conductors. The thickness of such a sign has to be adapted to the thickness of the pocket within at least in the parts of the sign intended to be inserted into the pocket. The sign may be inserted into the pocket to provide warning messages to workers installing electrical equipment and/or electrical cables or cable raceways or provides maintenance information. The sign may also be used to bridge certain equipment adjacent to the cable raceway according to the present invention. The bridging may prevent workers from touching parts underneath the sign, e.g. to shield high voltage connections or other dangerous parts. The sign may be shaped as a plate. The sign may be made of PMMA or the sign may be a Formica plate.

Preferably the sign is arranged between two adjacent covers carrying pockets, where the open side of the pockets facing together in order to insert the opposite sides of the sign into the adjacent pockets to provide a good fixation to the sign. If the adjacent covers and therefore the adjacent pocket are arranged at different heights above a mounting surface, the pockets can be brought to the same level of height by arranging spacers between at least one cable raceway and mounting surface. The invention further relates to a cable raceway comprising a cover as claimed in the present invention. A raceway is denoted as cable raceway when carrying at least one cable inside the closed cable raceway or on its outer surface, here on the second side of the cover of the cable raceway. Cable raceways made denote any pipe-like means enclosing cables running inside the cavity established by the inner side of the cable raceway in order to protect cables from the environment and rout cables through buildings, walls, ground etc. the cable raceways may have any shape, for example a pipelike shape with a circular, square or rectangular cross-section (or profile). In other embodiments, the cross-section may have other shapes within the scope of the present invention. The term pipe-like denotes three-dimensional means with a length significantly larger than the diameter of the means establishing an inner volume suitable to enclose cables arranged inside the inner volume. The term cable raceway is not limited to cable raceways made of a certain material. However the cable raceway is commonly made of PVC or other plastic material. In one embodiment the cable raceway is a wire duct, e.g. made of rigid-PVC with snap-off fingers establishing fence-like shaped side walls comprising cable hold-back noses at the side of the wire duct providing an ideal fit of the cover easy to be assembled. Brief description of the drawings

These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.

Fig.1 : a cover according to the present invention to close a cable raceway.

Fig.2: embodiments of the pocket of the cover as shown in figure 1.

Fig.3: the cover of figure 1 attached to a carrier means.

Fig.4: an embodiment of mounting the pocket to the second surface of the cover Fig.5 : another embodiment of the cover carrying a sign. Detailed description of embodiments Fig. l shows an embodiment of the cover 1 with a first side 11 and a second side 12 arranged on the opposite side of the first side 11 suitable to close a cable raceway 3 with the first side 11, wherein the cover 1 further comprises an open pocket 4 at least partly covering the second side 12 and shaped essentially parallel to the surface of the second side 12, wherein the pocket 4 accommodates a flat conductor 2 partly. The cover 1 is connected with two snap-in and/or slide-in slots 13 at the first side 11 of the cover 1 on opposite edges of the cover 1 to the cable raceway 3 with corresponding snap-in and/or slide-in slots 33. The slots 13 encompass the cable raceway 3 to provide a robust closed cable raceway. The closed cable raceway comprises a volume dedicated to accommodate electric cables established by the inner sides 31 and 11 of the closed cable raceway. The outer side 32 of the cable raceway 3 and the second side 12 of the cover 1 protect the cables arranged inside the closed volume of the closed raceway. The direction, into which the flat conductor 2 can be inserted into the pocket 4 is indicated by the dashed arrow IN. In the embodiment shown in figure 1 the inserted flat conductor 2 is only partly covered by the pocket 4 providing a simple visual check if a flat conductor 2 is already inserted into the pocket 4. The already inserted flat conductor 2 can be moved or slide along the cover 1 as indicated by the dashed arrow M in order to easily access any part of the cover 1 with a flat conductor 2. Figure 2 shows two examples of the pocket 4 in more details, where the pocket 4 comprises a fixation means 41 at the inner side of the pocket 44 to lock the flat conductor 2 in the pocket 4. The inner side 44 of the pocket 4 is the part of the pocket 4 facing towards the flat conductor 2 inserted to the pocket 4. Subsequently the part of the second side 12 covered by the pocket 4 is also considered as inner side 44 of the pocket 4. The fixation means 41 prevents the flat conductor 2 from slipping out of the pocket 4. In the left part of figure 2, the fixation means 41 are parallel aligned notches 41 on the second side 12 as inner side 44 of the pocket 4, which retain (or fix or hold) the wires of the flat conductor 2 in its position inside the pocket 4. In figure 2, the notches 41 also extend to areas of the second side 12 not covered by the pocket 4 in order to guide the conductive wires of the flat conductor 2 arranged outside the pocket 4. The right part of figure 2 shows a rip 41 with a rounded tip as the fixation means 41. The rip 41 may extend over the entire length (not visible in this front view) of the pocket 4 to guide the inserted flat conductor 2 in case of being moved along the cover 1 in direction M (shown in fig.1). In alternative embodiments the rip 41 may be interrupted locally or may be shaped as essentially filling the area above the fixed link between adjacent wires of the flat conductor 2. Such a rib will provide an even tighter fixation than the rip shown in fig.2.

Fig.3 shows the cover 1 connected to a carrier means 5 by connecting the snap-in and/or slide-in slots 13 to the corresponding slots 51 of the carrier means 5 at locations, where no cable raceway 3 is connected to the slots 13 of the cover 1. The carrier means will provide the same support to the cover 1 as provided by a cable raceway 3. Therefore, areas without a cable raceway 3 can be bridged with carrier means 5 without any negative influence on the mechanical stability of the cover 1 and the flat conductor 2 inserted into the pocket 4 of the cover 1. The carrier means 5 might be suitable to be mounted to a mounting surface to support the cover 1. In order to bridge areas with different distances to the cover 1 without bending the cover 1 the carrier means 5 is able to be telescoped T as indicated by the dashed arrow 7. With a telescope carrier means 5 (carrier means with a telescoping element), one can adapt the height of the carrier means 5 to the required height.

Fig.4 shows one embodiment of the cover 1 with second side 12 and pocket 4 manufactured as separate components and attached together to form the cover 1 in accordance to the present invention. In this example a double-sided adhesive tape 6 is attached to the surface of the pocket 4 facing towards the second surface 12 in order to glue pocket 4 and second side 12 together. The double-sided adhesive tape 6 may be attached to the pocket 4 over its entire length or only to part of the pocket 4. Both solutions will provide a sufficiently tight connection of pocket 4 and second surface 12. In alternative embodiments, the double-sided adhesive tape 6 might be attached to the second side 12 and the pocket 4 is glued to it. In this example, the pocket 4 is shaped as a U-shaped pocket. However the double-sided adhesive tape 6 can also be attached to differently shaped pockets 4 and/or second surfaces 12, e.g. curved pockets 4 or second sides 12. In alternative embodiments, other gluing techniques may be applied such as contact adhesive gluing, hot melt adhesive gluing or reactive adhesive gluing. In other embodiments the pocket might be attached to the second side of the cover by welding, screwing, riveting or other mechanical techniques. The attachment can be performed on the complete length of the pocket or only locally.

Fig.5 shows another embodiment, where two cable raceways 3 closed with oppositely arranged covers 1 (open side of the pockets 4 facing together) are arranged adjacent. The pockets 4 are carrying a sign 8 extending over the area located between the two cable raceways 3 to either provide information to a worker or to protect workers and/or equipment arranged underneath the sign 8. Here, the sign 8 is shown as a plate indicated with lines. This plate might be transparent to enable worker to see the equipment underneath the sign 8. The parts of the cover 1 carrying the sign 8 are not equipped with flat conductors 2. The thickness of the sign 8 is at least partly adapted to fit into the pocket 4. The sign 8 can be inserted into the pocket to provide warning messages to workers installing electrical equipment and/or electrical cables or cable raceways or to provide maintenance information. The sign 8 may also be used to bridge certain equipment adjacent to the cable raceways 3. The bridging may prevent workers from touching parts underneath the sign 8, e.g. to shield electrical connections or other dangerous parts. The sign 8 may be shaped as a plate. The sign 8 may be made of glass, PMMA or the sign may be a Formica plate. Here the adjacent cable raceways 3 with covers 1 and therefore the adjacent pockets 4 are arranged at different heights HI, H2 above a mounting surface 7. To bring the pocket 4 to the same level of height, spacers 9 are arranged between at least one cable raceway 3 and the mounting surface 7.

While the invention has been illustrated and described in details in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive; the invention is not limited to the disclosed embodiments.

Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference sign in the claims should not be construed as limiting the scope.

List of reference

1 cover according to the present invention

11 first side of the cover

12 second side of the cover

13 snap-in / slide-in slots of the cover

2 flat conductor

3 cable raceway

31 inner side of the cable raceway

32 outer side of the cable raceway

33 snap-in / slide-in slots of the cable raceway

4 pocket

41 fixation means

42 upper side of the pocket

43 open side of the pocket

44 inner side of the pocket

5 carrier means

6 adhesive tape

7 mounting surface

8 sign

9 spacer

TP thickness of the pocket

IN inserting direction for the flat conductor into the pocket M moving or sliding direction for inserted flat conductors

T telescoping of carrier means

HI first height above mounting surface

H2 second height above mounting surface