Cable duct

Abstract

A cable duct (100; 200) for an out-of-the wall electrical system, the duct comprising an enclosure (105; 205) configured to enclose an internal volume, wherein the internal volume comprises: - a first portion of volume (110(1); 210(1)); - a second portion of volume (110(2); 110(2)), wherein: - the first portion of volume is separated or separable from the second portion of volume by means of a separation element (115) inserted or, respectively, insertable within the internal volume; - the cable duct further comprises coupling elements (120) for coupling the separation element to the enclosure; - the first portion of volume is configured to house one or more lighting devices (130) when the separation element is inserted within the internal volume and is coupled to the enclosure.

Description

SECTOR

[0001] The present invention relates in general to the sector of electrical systems.

[0002] In particular, the present invention relates to a cable duct for use in surface-mounted electrical systems, i.e. systems which are visible or not embedded, in residential and / or professional and / or industrial premises.PRIOR ART

[0003] The expression "electrical system" is understood here as meaning the set of electric components which allows the distribution of electric power inside premises - such as a house, an office, a warehouse, a factory or a shop - for the electric powering of electric user devices inside the premises, such as electric household appliances, lighting devices, electric machinery and the like. Examples of electric components of an electrical system include distribution circuits comprising cabling with electric cables and / or wires, protection equipment, terminal circuits, electric panels, sockets, control switches.

[0004] A first type of electrical system is called a concealed electrical system and is a system where the electric components are embedded in the walls of the premises. In a concealed electrical system, cable ducts conveying inside them the electric cables and / or electric wires, and boxes containing other types of electric components, such as sockets and control switches, are mounted in the thickness of the walls.

[0005] A second type of electrical system is called a surface-mounted electrical system, i.e. a system which is visible or not concealed, in which the external components are at least partially not embedded. In this case, the cable ducts and the boxes are not inset within the thickness of the wall, but are visible and fixed to the surface of the walls.

[0006] Concealed electrical systems are typically provided in premises which have walls in which channels (for the cable ducts) and recesses (for the boxes) may be made. For example, concealed electrical systems are typically installed in houses or offices which are being built or have been recently constructed.

[0007] Surface-mounted electrical systems are typically installed in premises where it is not convenient or not necessary to form channels and recesses in the walls, such as industrial plants, or in premises which have walls in which it is not possible to form channels and recesses, such as historical or religious buildings. In all these cases, the cable ducts and the boxes of the surface-mounted electrical systems are fixed to the surface of the walls, for example using wall plugs.

[0008] Concealed electrical systems are more widespread. In fact a large number of electric components of the most widely varying types are commercially available, allowing the design engineers of concealed electrical systems the possibility of personalizing the systems to be installed according to the specific installation site and the intended use.

[0009] On the other hand, in the case of surface-mounted electrical systems, the variety of commercially available solutions is significantly less, while their cost is very high. The design of a surface-mounted electrical system is therefore less flexible, more complicated and more costly.

[0010] US 2022 / 316667 A1 describes an LED strip lamp and a LED strip lamp system.

[0011] US 2021 / 088201 A1 describes a lighting lamp.

[0012] US 2013 / 242570 A1 describes a light-emitting device.SUMMARY OF THE INVENTION

[0013] The Applicant has defined the object of providing a practical and efficient solution for the construction of surface-mounted electrical systems and in particular the Applicant has concentrated on the cable ducts for surface-mounted electrical systems. The Applicant has defined the object of providing a cable duct for surface-mounted electrical systems which may effectively increase the design flexibility of a surface-mounted electrical system, while reducing the installation costs.

[0014] According to the Applicant, the aforementioned object, along with other objects, may be achieved by providing cable duct for a surface-mounted electrical system, the internal volume of which is separated or separable into two volume portions, where one of the two volume portions is intended to house one or more lighting devices.

[0015] A first aspect of the present invention relates to a cable duct for an electrical system of the surface-mounted type.

[0016] The duct comprises an enclosure configured to enclose an internal volume.

[0017] The internal volume comprises a first volume portion and a second volume portion.

[0018] The first volume portion is separated or separable from the second volume portion by means of a separation element inserted or, respectively, insertable within the internal volume.

[0019] The cable duct also comprises coupling elements for coupling the separation element to the enclosure.

[0020] The first volume portion is intended to house one or more lighting devices with said separation element inserted within said internal volume and coupled to the enclosure.

[0021] In this way, it is possible to illuminate the premises in which the cable duct has been installed without having to install special boxes or components for lamps, which components in electrical systems of the surface-mounted type are costly and not practical. Consequently, the use of such a cable duct increases the design flexibility of a surface-mounted electrical system, while reducing the installation costs.

[0022] In accordance with an embodiment of the present invention, the second volume portion is intended to house electric wiring.

[0023] The cable duct is therefore advantageously able to perform the dual function of providing illumination and at the same time allowing the distribution of electric power.

[0024] Owing to the presence of the separation element, the wiring and the lighting devices are housed in separate zones of the internal volume of the cable duct.

[0025] In accordance with an embodiment of the present invention, the separation element is configured to act as a support for said lighting devices with said separation element inserted within said internal volume and coupled to the enclosure.

[0026] In accordance with an embodiment of the present invention, the separation element is made of a metallic material.

[0027] In this way, the dissipation of the heat which may develop during the operation of the lighting devices is advantageously facilitated.

[0028] In accordance with an embodiment of the present invention, said enclosure comprises a first enclosure portion and a second enclosure portion.

[0029] In accordance with an embodiment of the present invention, said first volume portion is delimited by said first enclosure portion and by said separation element when said separation element is inserted within said internal volume and coupled to the enclosure.

[0030] In accordance with an embodiment of the present invention, said second volume portion is delimited by said second enclosure portion and by said separation element when said separation element is inserted within said internal volume and coupled to the enclosure.

[0031] In accordance with an embodiment of the present invention, said first enclosure portion can be removably coupled to the second enclosure portion.

[0032] By allowing the removal of the first enclosure portion, it is possible to ensure easy access to the first volume portion and, therefore, facilitate any operations for installation of the lighting devices or for inspection thereof once installed inside the cable duct.

[0033] In accordance with an embodiment of the present invention, said first enclosure portion comprises at least one at least partially transparent portion.

[0034] In this way, the light generated by activation of the lighting devices is advantageously able to pass outside the cable duct.

[0035] In accordance with an embodiment of the present invention, the duct has a cross-section with a substantially circular or rectangular shape.

[0036] In accordance with an embodiment of the present invention, said lighting devices comprise at least one strip of light-emitting diodes.

[0037] In accordance with an embodiment of the present invention, said cable duct comprises said separation element.

[0038] In accordance with an embodiment of the present invention, said cable duct comprises at least one fitting which can be coupled to the cable duct in order to allow connection of said cable duct to further elements of an electrical system.

[0039] In accordance with an embodiment of the present invention, said at least one fitting comprises at least one swivel fitting for allowing rotation of said at least one cable duct around a longitudinal axis of said at least one duct when coupled to said at least one swivel fitting.BRIEF DESCRIPTION OF THE FIGURES

[0040] The present invention will become clearer from the following detailed description, provided by way of a non-limiting example, with reference to the attached set of drawings, in which: Fig. 1A is a cross-sectional view of a cable duct in accordance with an embodiment of the present invention; Fig. 1B is an axonometric view of the cable duct of Fig. 1A according to an embodiment of the present invention; Fig. 1C is an axonometric view, with parts partially removed, of the cable duct of Fig. 1A according to an embodiment of the present invention; Figs. 1D-1E are exploded axonometric views of the cable duct of Fig. 1A according to an embodiment of the present invention; Fig. 2A is a cross-sectional view of a cable duct in accordance with a further embodiment of the present invention; Fig. 2B is an axonometric view of the cable duct of Fig. 2A according to an embodiment of the present invention; Fig. 2C is an axonometric view, with parts partially removed, of the cable duct of Fig. 2A according to an embodiment of the present invention; Figs. 2D-2E are exploded axonometric views of the cable duct of Fig. 2A according to an embodiment of the present invention; Fig. 3 shows a portion of a surface-mounted electrical system in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0041] With reference to the drawings, Figs. 1A-1E - which use the same reference system identified by the three orthogonal directions x, y, z - show a (portion of a) cable duct 100 for a surface-mounted electrical system in accordance with an embodiment of the present invention.

[0042] More specifically, Fig. 1A is a cross-sectional view of the cable duct 100 along a cross-sectional plane parallel to the directions y and z; Fig. 1B is an axonometric view of the cable duct 100; Figure 1C is an axonometric view, with parts partially removed, of the cable duct 100; Figs. 1D-1E are exploded axonometric views of the cable duct 100.

[0043] In accordance with an embodiment of the present invention, the cable duct 100 comprises an enclosure - identified overall by the reference number 105 - which is configured to enclose an internal volume.

[0044] In accordance with an embodiment of the present invention, the enclosure 105 has a substantially tubular shape which extends along a longitudinal axis (parallel to the direction x) and which has a cross-section (i.e. perpendicular to the direction x) which is substantially circular.

[0045] In accordance with an embodiment of the present invention, the internal volume enclosed by the enclosure 105 comprises a first volume portion 110(1) and a second volume portion 110(2).

[0046] Using the reference system defined by the orthogonal directions x, y, z and the spatial orientation of the cable duct 100 used in the figures in order to represent the duct, the first volume portion 110(1) corresponds to an upper portion (relative to the direction y) of the volume enclosed by the enclosure 105, while the second volume portion 110(2) corresponds to a lower portion (relative to the direction y) of the volume enclosed by the enclosure 105.

[0047] In accordance with an embodiment of the present invention, a separation element 115 is inserted, or is insertable, within the internal volume enclosed by the enclosure 105 in order to separate the first volume portion 110(1) from the second volume portion 110(2).

[0048] In this respect, in accordance with an embodiment of the present invention, the cable duct 100 comprises coupling elements 120 for coupling the separation element 115 to the enclosure 105.

[0049] In accordance with an embodiment of the present invention, the separation element 115 has a plate-like form with a first main surface 118(1) and a second main surface 118(2) (opposite to the first main surface) which extend substantially parallel to the x and z directions when the separation element 115 is coupled to the enclosure 105. The separation element 115 also comprise two side surfaces 119 (one of which is visible in Fig. 1D) which connect the first main surface 118(1) to the second main surface 118(2) extending substantially parallel to the x and y directions when the separation element 115 is coupled to the enclosure 105.

[0050] In accordance with an embodiment of the present invention, the coupling elements 120 comprise two support guides connected to the enclosure 105, for example made as one piece with at least one portion of the enclosure 105.

[0051] As is more clearly visible in Figs. 1C and 1D, in which the separation element 115 is not (yet) inserted inside the cable duct 100, in accordance with an embodiment of the present invention, the support guides of the coupling elements 120 are shaped with a C-shaped profile (in the plane parallel to the y and z directions) so as to define grooves 122 which extend along the direction x. Said grooves 122 are designed to receive inside them corresponding side edges of the separation element 115 corresponding to the side surfaces 119 thereof. The ideas of the present invention may in any case be applied also to cases where the coupling elements 120 have a different form, for example with support guides having a profile different from that shown in the figures.

[0052] In accordance with an embodiment of the present invention, when the separation element 115 is housed inside the grooves 122, the separation element 115 is stably coupled to the enclosure 105, and therefore to the cable duct 100, ensuring stable separation of the first volume portion 110(1) from the second volume portion 110(2).

[0053] In accordance with an embodiment of the present invention, the first volume portion 110(1) and the second volume portion 110(2) are intended to house different classes of electric components (when said separation element 115 is inserted within the internal volume enclosed by the enclosure 105 and coupled to the latter by means of the coupling elements 120).

[0054] In accordance with an embodiment of the present invention, the first volume portion 110(1) is intended to house electric components designed to operate within a first range V1 of voltage values, and the second volume portion 110(2) is intended to house electric components designed to operate within a second range V2 of voltage values, wherein the voltage values of the first range V1 are smaller than the voltage values of the second range V2. The first volume portion 110(1) could also be intended for the passage of data transmission cables and / or optical fibre cables.

[0055] In accordance with an embodiment of the present invention, the first volume portion 110(1) is intended to house electric components designed to operate at voltages (for example DC voltages) of the order of 12-15 volts.

[0056] In accordance with an embodiment of the present invention, the second volume portion 110(2) is intended to house electric components designed to operate at voltages (for example AC voltages) of the order of 220-230 volts or 100-110 volts.

[0057] The ideas of the present invention may in any case be applied to cases where the voltage values are different from those of the examples mentioned.

[0058] In accordance with an embodiment of the present invention, the first volume portion 110(1) is intended to house one or more lighting devices 130, for example comprising one or more strips of light-emitting diodes (LEDs). The ideas of the present invention may also be applied to cases where the lighting devices 130 are of a different type, for example comprising one or more light bulbs.

[0059] As will be described in greater detail in the continuation of the present description, in accordance with an embodiment of the present invention at least one portion of the enclosure 105 may be at least partially transparent, so as to allow the light generated by activation of the lighting devices 130 to pass outside the cable duct 110 so as to allow the illumination of the premises in which the cable duct 110 has been installed without having to perform the installation of special lamps.

[0060] In accordance with an embodiment of the present invention, the second volume portion 110(2) is intended to house electric cables 140 (visible in Fig. 1E), for example comprising one or more electric cables and / or electric wires.

[0061] In accordance with an embodiment of the present invention, the separation element 115 is also configured to act as a support for the lighting devices 130.

[0062] In this connection, in accordance with an embodiment of the present invention, the lighting devices 130 are arranged on the first main surface 118(1) of the separation element 115. In accordance with an embodiment of the present invention, the lighting devices 130 may also be fixed (for example by means of adhesives or fixing elements not shown) to the main surface 118(1) of the separation element 115.

[0063] In accordance with an embodiment of the present invention, the separation element 115 is made using a metallic material, for example aluminium or another metal, the thermal conductivity of which may be advantageously used in order to dissipate heat. In this way, since the lighting devices 130 are in contact with the separation element 115, dissipation of the heat which may occur during operation of the lighting devices 130 is advantageously facilitated.

[0064] In accordance with an embodiment of the present invention, the enclosure 105 comprises a first enclosure portion 105(1) and a second enclosure portion 105(2).

[0065] In accordance with an embodiment of the present invention, the first enclosure portion 105(1) corresponds substantially to the portion of the enclosure 105 located above (along the direction y) the first volume portion 110(1). In other words, the first enclosure portion 105(1) acts as an "upper cover" (along the direction y) of the first volume portion 110(1).

[0066] In accordance with an embodiment of the present invention, the first enclosure portion 105(1) can be removably coupled to the second enclosure portion 105(2). In this way, by allowing the removal of the first enclosure portion 105(1), it is possible to ensure easy access to the first volume portion 110(1) and, therefore, facilitate any operations for installation of the lighting devices 130 or for inspection thereof once installed inside the cable duct 100.

[0067] Figs. 1A-1C show the cable duct 100 with the first enclosure portion 105(1) which is coupled to the second enclosure portion 105(2), while Figs. 1D and 1E show the cable duct 100 with the first enclosure portion 105(1) which is uncoupled from the second enclosure portion 105(2).

[0068] In accordance with an embodiment of the present invention and with reference in particular to Fig. 1A, when the first enclosure portion 105(1) is coupled to the second enclosure portion 105(2) and the separation element 115 is coupled to the enclosure 105: the first volume portion 110(1) is delimited by the first enclosure portion 105(1) and by the separation element 115; the second volume portion 110(2) is delimited by the second enclosure portion 105(2) and by the separation element 115.

[0069] In accordance with an example of embodiment of the present invention, the removable coupling between the first enclosure portion 105(1) and the second enclosure portion 105(2) is performed by means of a snap-action fastening device comprising engaging elements 140 located on the first enclosure portion 105(1) and designed to engage with corresponding seats 145 located on the second enclosure portion 105(2). The ideas underlying the present invention may also be applied to cases where the snap-action fastening device is formed differently, for example with engaging elements located on the second enclosure portion 105(2) and designed to engage with corresponding seats located on the first enclosure portion 105(1), or to cases where the removable coupling between the first enclosure portion 105(1) and the second enclosure portion 105(2) is formed with a device different from a snap-action fastening device, for example a sliding coupling device in which one of the enclosure portions is slid inside seats formed in the other enclosure portion.

[0070] In accordance with an embodiment of the present invention, the enclosure portion 105 which is at least partially transparent is located on the first enclosure portion 105(1). For example, the whole of the first enclosure portion 105(1), or one or more parts thereof, are made of a material (for example, polycarbonate) which is transparent or opalescent. In this way, the light generated by activation of the lighting devices 130 located in the first volume portion 110(1) is able to pass through the outer walls of the cable duct 100 (and therefore light up the external environment), while the contents of the second volume portion 110(2) (electric wires and / or cables) remain covered and not visible from the outside. The cable duct 100 is therefore able to perform the dual function (that of illumination and at the same time that of allowing the distribution of electric power) while ensuring an overall pleasant external appearance (the visually unattractive components such as electric wires and / or cables are in fact covered and hidden from view).

[0071] In accordance with an embodiment of the present invention, a (further) first completely opaque enclosure portion 105(1), to be used instead of the first transparent enclosure portion, may be used, so as to allow the designer of the electrical system to use (for example, like a conventional duct) the cable duct 100 along sections thereof where no illumination by the duct is required.

[0072] Figs. 2A-2E show a (portion of a) cable duct 200 for a surface-mounted electrical system in accordance with a further embodiment of the present invention.

[0073] More specifically, Fig. 2A is a cross-sectional view of the cable duct 200 along a cross-sectional plane parallel to the directions y and z; Fig. 2B is an axonometric view of the cable duct 200; Fig. 2C is an axonometric view, with parts partially removed, of the cable duct 200; Figs. 2D-2E are exploded axonometric views of the cable duct 200.

[0074] The cable duct 200 is functionally similar to the cable duct 100 described in Figs, 1A-1E and from a structural point of view has only one significant difference, namely it has a different cross-section. For this reason, the elements and parts of the cable duct 200 which are the same or correspond to the elements or parts of the cable duct 200 will not be discussed again, and their explanation (for example, characteristic features, effects, implementation, generalizations, examples, advantages and variants) will not be repeated for simpler illustration. Moreover, the same elements of the cable duct 100 and the cable duct 200 are indicated by means of the same reference numbers, while corresponding elements of the cable duct 100 and the cable duct 200 are indicated by means of similar reference numbers (in particular, the reference numbers of the elements or parts of the cable duct 200 are distinguished from the reference numbers of the elements or parts of the cable duct 100 corresponding to them, by means of the first digit).

[0075] In accordance with an embodiment of the present invention, the cable duct 200 also comprises an enclosure 205 configured to enclose an internal volume.

[0076] In accordance with an embodiment of the present invention, the enclosure 205 has a substantially tubular form, which extends along a longitudinal axis (parallel to the direction x) and has a cross-section (i.e. perpendicular to the direction x) which is substantially rectangular.

[0077] In accordance with an embodiment of the present invention, the internal volume enclosed by the enclosure 205 comprises a first volume portion 210(1) (intended to house one or more lighting devices 130) and a second volume portion 210(2) (intended to house electric cables 140) separated (or separable) by means of a separation element 115 coupled to the enclosure 205 by means of coupling elements 120 comprising support guides which define grooves 122 for the separation element 115.

[0078] In accordance with an embodiment of the present invention, the enclosure 205 comprises a first enclosure portion 205(1) and a second enclosure portion 205(2) with the first enclosure portion 205(1) which can be removably coupled to the second enclosure portion 205(2) and acts as an upper cover (along the direction y) removable from the volume portion 210(1).

[0079] In the same way as the enclosure 105 of the cable duct 100, in accordance with an embodiment of the present invention, the enclosure 205 may have at least one partially transparent portion located on the first enclosure portion 205(1). In the same way as for the cable duct 100, a (further) first completely opaque enclosure portion, to be used instead of the first transparent enclosure portion, may be provided, so as to allow the designer of the electrical system to use (for example, like a conventional duct) the cable duct 200 along sections thereof where no illumination by the duct is required.

[0080] Fig. 3 shows (a portion of) an example of a surface-mounted electrical system 300 comprising a cable duct in accordance with an embodiment of the present invention.

[0081] The electrical system 300 is an electrical system of the surface-mounted type, where the components are fixed to the surface of one or more walls by means of corresponding wall fixing elements 310, such as wall plugs.

[0082] In the portion of the electrical system 300 shown by way of example in Fig. 3 a plurality of cable ducts 320(1) - 320(5) and a box 330 are visible. In accordance with an embodiment of the present invention, each cable duct 320(1) - 320(5) and / or box 330 may comprise fittings 340 for coupling to the other components of the electrical system.

[0083] In the example shown, the cable duct 320(1) is a cable duct corresponding to the cable duct 100 shown in Figs. 1A-1E, comprising a first volume portion which houses lighting devices (for example an LED strip) and a second volume portion which houses electric wiring, and wherein the enclosure may comprise a first transparent enclosure portion 105(1) corresponding to the first volume portion and a second, opaque, enclosure portion 105(2) corresponding to the second volume portion. When the lighting devices located in the first volume portion of the cable duct 320(1) are activated, the light generated by said lighting devices (identified in the figures by means of a series of arrows) reaches the outside of the cable duct 320(1) and therefore illuminates the premises where the electrical system 300 is installed.

[0084] The remaining cable ducts 320(2) - 320(5) may be cable ducts similar to the cable ducts 320(1) (and therefore to the cable duct 100), but with enclosures which are completely opaque and / or without lighting devices inside them.

[0085] In accordance with an embodiment of the present invention, the fittings 340 directly coupled to the cable duct 320(1) comprise at least one swivel fitting for allowing a rotation (at least partial) of the cable duct 320(1) around its longitudinal axis. In this way, the light emitted by the cable duct 320(1) may be (at least) partially directed when the lighting devices inside the duct are activated.

[0086] Obviously, in order to meet local and specific needs, a person skilled in the art may make numerous logical and / or physical alterations and modifications to the invention. More particularly, although the present invention has been described in a specific manner with reference to preferred embodiments thereof, it must be understood that various omissions, replacements and modifications are possible with regard to the form and the details or other embodiments.

[0087] For example, the ideas of the present invention may be applied to cable ducts with cross-sections having shapes different from a circular or rectangular shape, such as a prismatic or semi-circular shape.

Claims

1. A cable duct (100; 200) for a surface-mounted electrical system, the duct comprising an enclosure (105; 205) configured to enclose an internal volume, wherein the internal volume comprises: - a first volume portion (110(1); 210(1)); - a second volume portion (110(2); 110(2)), wherein: - the first volume portion is separated or separable from the second volume portion by means of a separation element (115) inserted or, respectively, insertable within the internal volume; - the cable duct further comprises coupling elements (120) for coupling the separation element to the enclosure; - the first volume portion is configured to house one or more lighting devices (130) when the separation element is inserted within the internal volume and is coupled to the enclosure, - the enclosure (105, 205) comprises a first enclosure portion (105(1); 205(1)) and a second enclosure portion (105(2); 205(2)); and - the first enclosure portion (105(1); 205(1)) and the second enclosure portion (105(2); 205(2)) are coupled together by means of a removable coupling formed by means of a snap-action fastening device.

2. The cable duct (100; 200) according to claim 1, wherein the snap-action fastening device comprises engaging elements (140) located on the first enclosure portion (105(1)) and designed to engage with corresponding seats (145) located on the second enclosure portion (105(2)) or engaging elements located on the second enclosure portion (105(2)) and designed to engage with corresponding seats located on the first enclosure portion (105(1)).

3. The cable duct (100; 200) according to claim 1 or 2, wherein the first volume portion (110(1) is configured to house electric components designed to operate within a first range V1 of voltage values, and the second volume portion (110(2)) is configured to house electric components designed to operate within a second range V2 of voltage values, wherein the voltage values of the first range V1 are smaller than the voltage values of the second range V2.

4. The cable duct (100; 200) according to claim 1, 2 or 3, wherein the first volume portion (110(1)) is configured to house electric components designed to operate at DC voltages of the order of 12-15 volts and wherein the second volume portion (110(2)) is configured to house electric components designed to operate at AC voltages of the order of 220-230 volts or 100-110 volts.

5. The cable duct (100; 200) according to claim 1, 2, 3 or 4, wherein the second volume portion (110(1); 110(2)) is configured to house electrical wiring (140).

6. The cable duct (100; 200) according to any one of the preceding claims, wherein the separation element (115) is configured to act as a support for the lighting devices (130) when the separation element is inserted within the internal volume and coupled to the enclosure (105; 205).

7. The cable duct (100; 200) according to any one of the preceding claims, wherein the separation element (115) is made of a metallic material.

8. The cable duct (100; 200) according to any one of the preceding claims, wherein: - the first volume portion (110(1); 210(1)) is delimited by the first enclosure portion (105(1); 205(1)) and by the separation element (115), when the separation element is inserted within the internal volume and coupled to the enclosure (105); - the second volume portion (110(2); 110(2)) is delimited by the second enclosure portion (105(2); 205(2)) and by the separation element (115), when the separation element is inserted within the internal volume and coupled to the enclosure (105).

9. The cable duct (100; 200) according to any one of the preceding claims, wherein the first enclosure portion (105(1); 205(1)) comprises at least one at least partially transparent portion.

10. The cable duct (100; 200) according to any one of the preceding claims, wherein the duct has a cross-section with a substantially circular or rectangular shape.

11. The cable duct (100; 200) according to any one of the preceding claims, wherein the lighting devices (130) comprise at least one strip of light-emitting diodes.

12. The cable duct (100; 200) according to any one of the preceding claims, wherein the cable duct comprises the separation element (115).

13. The cable duct (100; 200) according to any one of the preceding claims, wherein: - the cable duct comprises at least one fitting (330) which can be coupled to the cable duct in order to allow the connection of the cable duct to further elements of an electrical system (300); - the at least one fitting comprises at least one swivel fitting for allowing rotation of the at least one cable duct around a longitudinal axis of the at least one duct when coupled to the at least one swivel fitting.

14. An electrical system (300) of the surface-mounted type comprising a cable duct (100, 200) according to any one claims 1-13, a box (330) and at least one fitting (340), wherein the first volume portion houses a lighting device (130) and wherein the second volume portion houses electric cables designed operate at an AC voltage of the order of 220-230 volts or 100-110 volts.

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