MXPA98008258A

MXPA98008258A - Cable clamp and an electrical apparatus fitted with such a cable clamp.

Info

Publication number: MXPA98008258A
Application number: MXPA98008258A
Authority: MX
Inventors: Deneu Dominique
Original assignee: Legrand & Legrand Snc
Priority date: 1997-10-07
Filing date: 1998-10-07
Publication date: 2005-07-15
Also published as: HU222172B1; FR2769418B1; ES2260822T3; DE69833927D1; HU9802247D0; EP0908972A1; HUP9802247A2; DE69833927T2; HUP9802247A3; ATE321366T1; EP0908972B1; FR2769418A1

Abstract

When grip is mounted in socket unit, the entering cable (23) can be clamped in one of three positions as desired. At least two clamping plates (28A,28B) stretching in different directions, comprising central clamping plate and clamping shoulder plate, having at least one fixing clamp screw (30).

Description

SUBJECT-CABLES AND ELECTRICAL EQUIPMENT EQUIPPED WITH A SUBJECT- CABLE S DESCRIPTION OF THE INVENTION The present invention relates in general to the electrical appliances that its users must equip themselves with an electric cable for its application. Even if they can also be used in a fixed way, it is most often, mobile electrical appliances; such as, for example, multiple socket bases. The regulations in force in the matter require that the box of these electrical appliances be equipped with a stop device, which is commonly called a cable - holder, and that for obvious security reasons must be able to guarantee an energetic retention of the electric cable. , if in a fortuitous or involuntary way it is subject to an attraction and / or a torsion susceptible to provoke the start.

A cable clamp such as this comprises, in most cases, a simple bridge suitable for an adjustment of the electric cable. The standards require that this adjustment involves the sleeve of insulating material that usually contains the electrical cable, as in the case of flexible electrical cables. Consequently, these standards require that a certain number of other requirements be met, among which is: the way to carry out the protection of the electric cable with respect to the attraction and the torsion must be easily recognized, the clamp 1, and less one of its constituents, and here in most cases it is a platen or a base plate propping up the electric cable when it is held by the bridge, must be incorporated or fixed permanently to one of the constituent parts of the electrical device that has been mentioned, or more precisely, to one of the constituent parts of the latter's case. The cable holder must be adaptable to the different types of electrical cables that can be placed and its efficiency should not depend on the assembly of the constituent parts of the electrical appliance box; the cable holder must be made of insulating material or tolerate an insulating protection for those of its constituents that are made of metal; and the latter, including any fixing screws, must be isolated from the corresponding ground contact. On the other hand, it is found that, in order to facilitate the use of the electrical equipment involved, it would be good if the output of its electric cable could, depending on the choice, be made following one or the other of the numerous orifices that are different. Thus, for example, in the European patent application No. 0 681 348, which refers to a connector, it is provided that this outlet is made in axial or lateral form. In order to do this, a single piece was installed, which comprises laterally one of the f or n d a b 1 e s, between which one is eliminated for the lateral exit of the electric cable and which, for this, does not constitute a cable clamp in the measurement; on the one hand where this piece does not satisfy at least some of the requirements mentioned above, and where on the other hand this participates on the contrary in the constitution of the connector box involved. When it is an effective cable tie, it is contemplated that several possible orientations for the electric cable may be available, one might think that only one piece has to be installed, it is necessary to take up the usual bridge in the matter and provide for this several possible implantations in the electrical appliance box following the guidelines that must be met for such electric cable. This arrangement leads to an expensive multiplication of the fixing points provided for the bridge. Furthermore, it does not allow one of the requirements mentioned above to be met with any certainty. In fact, if the electrical device is delivered with the bridge of its cable-holder mounted in one of its determined positions and if the user wishes that the output of the electric cable is made following an orientation that does not correspond to this position, this is not necessarily so obvious for him who must place this bridge and reassemble it in the position corresponding to the orientation he has chosen for the electric cable. Therefore, there is a risk in this case that the cable holder is not actually installed and this is to the detriment of safety. The present invention, in general, has as its object an arrangement that allows to have several possible orientations for the electric cable respecting all the requirements that must be satisfied in terms of s u j e t a - c a b 1 e s. More specifically, this invention has as its object a holder 1, which is intended to equip the box of any electrical device and which is of the type of those that contain a bridge suitable for a fastening of the electric cable that is going to Connecting to this electrical appliance, in general this wire-holder is characterized in that, to meet the demand, it contains an electric cable, one or the other of at least two different orientations and also comprises, in one piece, at least two bridges whose elongation directions are in themselves different, namely, a bridge so called by simple comfort central bridge and at least one bridge so called by simple lateral bridge comfort, and having for its attachment to the electrical appliance box, at least a chimney; This invention also has as an object any electrical apparatus whose box is equipped with a cable clamp as mentioned for the maintenance of the electric cable to be connected to it. In summary, the cable holder that follows the invention, tolerates itself, although with considerable advantage in the form of a single piece, a bridge for each of the orientacio is possible for the electric cable, it is mandatory that it is placed for the installation of this electric cable and there is only one way to put it back in its place, which is in the interest of safety and allows to guarantee with all certainty that whatever the orientation retained for the electric cable, it will be effectively placed. In addition, because the bridges present here participate in the constitution of a single piece, the number of fixing points that must be foreseen for the assembly are greatly minimized. In practice, the number of these fixing points can be reduced to two, this advantageously, and to the benefit both of the price of the whole and of the security. In short, whatever the orientation retained by the electric cable, the curvature that will be imposed on it does not concern advantageously more than its only conductors and not its sleeve. The corresponding radius of curvature can thus be reduced with great advantages, in favor of a reduction of the space conditions in the plane of the assembly. Consequently, and in a preferential manner, in order to reduce the height-space conditions of the assembly, following the invention it has been foreseen that it guarantees all the fastening with which it must be fulfilled, the single piece that according to the invention forms the set of the bridges come to to be in contact with the wall of the box with which it is related when the electric cable to be enclosed is a minimum diameter electric cable. Preferentially and in order to minimize the space conditions due to the cable holder inside the box of the electrical appliance, it has been foreseen that following a development of the invention, when the cable-holder will tolerate a central bridge and two bridges lateral, the lateral bridges are divergent with respect to each other from the central bridge, so that, if a connection terminal for the electric cable is eventually present, this connection terminal can more easily find its place among its lateral branches if so it is desired. In conclusion, the arrangement according to the invention allows with great advantages the realization of a particularly interesting eta-cable; both from the economic point of view and from the point of view of safety, the minimization of space conditions and simplicity of use. In addition, the features and advantages of the invention will be highlighted from the following description, by way of example, with reference to the accompanying schematic drawings in which: Figure 1 is a perspective view of an electrical apparatus equipped with a cable holder following the invention; Figure 2 is, on a larger scale, a partial exploded perspective view of this electrical apparatus, with the cable holder that tolerates it fastened on the electric cable that has been connected to it; Figure 3 is, at the same scale as that of Figure 2, a perspective view of this cable holder and of the part of the electrical apparatus box on which it is attached; Figure 4 is, on a different scale, a perspective view of this cable holder which is shown in isolation and seen from above; Figure 5 is another perspective view 3 seen below; Figures 6 and 7 are cross-sectional views, each following respectively the lines VI-VI and V I I-V 11 of Figure 4; Figure 8 is, following arrow VIII of Figure 2, a plan view of this cable holder, instead of the box of the electrical apparatus involved and for a first orientation of the electrical cable that encloses; Figure 9 is on a different scale, a cross-sectional view of the assembly following line IX-IX of Figure 8; Figure 10 is a plan view analogous to that of Figure 8, for another orientation of the electrical cable; Figure 11 is, to the scale of Figure 9, and following line XI-XI of Figure 10, a cross-sectional view of the assembly for this other orientation of the electrical cable; Figures 12 and 13 are partial views in section of the assembly, each following respectively the lines XII-XII and XIII-XIII of Figure 11: Figure 14 is a cross-sectional view analogous to that of Figure 11, for another electric cable; Figure 15 is a partial perspective view of a variant embodiment of the electrical appliance box according to the invention. These figures illustrate, by way of example, the application of the invention in the case in which the electrical apparatus 10 concerned is a multi-outlet socket. Then, this electrical appliance 10 comprises, in front of a box 11, and, more precisely, on the upper face 12 of this box 11, a plurality of wells 13 at the bottom of each of which an outlet base 14 intervenes.

In the represented embodiment, the box 11 is globally for 1 epipedal, and is formed, on the one hand, by a base 15 that itself forms its bottom wall 16, and that has the essentials of the necessary mechanisms , and, on the other hand, by a hood 18 that forms its upper face 12, with the wells 13 and that is duly related in a removable manner in the base 15. In the embodiment shown, the hood 18 extends to all the top of the box 11 and consequently for the essentials the base 15 is reduced to the bottom wall 16. Therefore, the hood 18 also tolerates the upper face 12, two longitudinal faces 19 and alternating with it two transverse faces 20 In the represented embodiment, the hood 18 fits into the base 15, and for this, the latter has a rim 22 on its periphery. The first 1, disengagement 1, of the hood 18 in the base 15 it can be done for example by device of ratchet and / or by bolting. The corresponding provisions, which are not relevant to the present invention, will not be described here.

In practice, the electrical device 10 thus involved is mobile, however it can also be used in a fixed manner. For the communication service of the various receptacle bases 14 that this tolerates, an electric cable 23 is provided, and, in the represented embodiment, it is a flexible electrical cable that tolerates, inside a sleeve of insulating material 24, the various electrical conductors 25 needed. Its case 11 is therefore equipped with a cable holder 26 suitable for the maintenance of this electric cable 23. In the embodiment shown, this cable holder 26 intervenes inside the box 11. For example , and as shown, is related to the bottom wall 16 thereof. But, of course, another provision is contemplated. In a known manner, the cable holder 26 tolerates at least one bridge 28 ?, 28B suitable for an adjustment of the electric cable 23, this adjustment being made in practice in cooperation with the bottom wall 16 to which it is related.

If requested, in order to impose on the electric cable 23 one or the other of at least 2 different orientations, the cable holder 26 tolerates, in one piece and following the invention, at least two bridges 28? 28B in which the directions of stretching are in themselves different; these are, a bridge 28A so-called by simple comfort central bridge and at least one bridge 28B so called by simple lateral bridge comfort, having for its attachment to the box 11 of the electrical appliance 10, at least one chimney 30. Here it is understood that the direction of stretching for a bridge 28A, 28B, is the general direction according to which a certain bridge 28A, 28B extends. In the embodiment shown and following a general configuration in U, the cable holder 26 tolerates three bridges 28A, 28B, which are the central bridge 28A and two lateral bridges 28B and taken individually these different bridges 28A, 28B are all substantially rectilinear. In practice, the stretching directions of these bridges 28A, 28B are globally orthogonal to the orientations that have been chosen as possible for the electric cable 23. However, in the embodiment shown, each of the side bridges 28B forms with the central bridge 28A an angle A slightly greater than 90 °, opening outwards as it moves away from this central bridge 28A. Therefore the two lateral bridges 28B diverge from one another counting from the central bridge 28A. In the embodiment shown, the angle A is the same for one and the other of the two lateral bridges 28B. Whatever happens, the two lateral bridges 28B are, in practice, remarkably coplanar. Therefore and following the invention the cable holder 26, in the embodiment represents, a plane of symmetry M which, being perpendicular to its central bridge 28 ?, passes through the median zone thereof. This plan of symmetry M is schematized in lines interrupted by its stroke in figure 8.

After performing the abstraction of balancing means being explicit subsequently, the lower surface 31B of the lateral bridges 28B are remarkably flush with the lower surface 31A of the central bridge 28A. But, if, in the represented embodiment, the central bridge 28A has a remarkably constant height along its length, the same does not happen for the lateral bridges 28B, whose height on the contrary, progressively decreases from the central bridge 28A. Therefore, for the central bridge 28A, the upper surface 32A is substantially parallel to the lower surface 31A. By contrast, for the side bridges 28B, the upper surface 32B progressively approaches the lower surface 31B as it moves away from the central bridge 28A. In addition to their lower surfaces 31A, 31B, and upper 32A, 32B, the bridges 28A, 28B tolerate respectively, lateral surfaces 33A, 33B which, in the embodiment, are remarkably parallel to each other after performing the abstraction of an eventual dispossession of molding.

In the represented embodiment, and following the invention, the cable holder 26 tolerates two chimneys 30. One of these chimneys 30 intervenes remarkably in the connection of the central bridge 28A with one of the side bridges 28B, in half-width for these bridges 28A, 28B, that is to say the distance of their lateral surfaces 33A, 33B and, also, another one of these chimneys 30 intervene remarkably in the junction of the central bridge 28A with another one of the lateral bridges 28B, in half-width for these bridges 28A, 28B, ie at half-distance from their side surfaces 33A, 33B. In practice, the chimneys 30 extend perpendicularly in the plane of the bridges 28 A, 28B. At its entrance exit 35, which is located on the side of the upper surface 32A, 32B of the bridges 28A, 28B, the chimneys 30 have, slightly backwards from that entrance exit 35, a neck 36 of lower passage section to the section of passage that they present in their current part, for the support of the head 37 of a screw 38.

At least one of the bridges 28A, 28B of the cable clamp 26 according to the invention, and preferably 1, as shown, each of these bridges 28A, 28B has at least one recess 40A, 40B in one concavity in its lower surface 31 A,. 31B. In practice, in the represented embodiment, only one notch 40A, 40B has been provided on the bridges 28A, 28B. From one to the other of the side bridges 28B, the recesses 40B are substantially aligned with one another. For example, and as shown, the recesses 40A, 40B have a circular arc profile. These extend notably in the median zone of the bridges 28A, 28B, a s emi-d i s t a n c a a the ends of these. In the represented embodiment, at least one of the bridges 28A, 28B of the cable holder 26 following the invention, and, preferably, 1, and as shown, each of these bridges 28A, 28B tolerates, in a concavity in its lower surface 31A, 31B, notably for molding reasons, a cavity 42A, 42B, where it results that it is shape, remarkable and parallel to its direction of stretching and remarkably and parallel to one another, two walls 43A, 43B. It goes without saying that the recess 40A, 40B indifferently affects one and the other of these walls 43A, 43B and the outer surface thereof form the corresponding lateral surfaces 33A, 33B. In the represented embodiment, at least one of the bridges 28A, 28B of the cable holder 26 according to the invention, and, preferably, 1, as shown, each of these bridges 28A, 28B tolerate, in one concavity in its lower surface 31A, 31B, a indentation 44A, 44B, which in a manner remarkably and parallel to its elongation direction, it extends at least a part of its length, notably to its walls, 43A, 43B. For the central bridge 28A, the indentation 44A only extends over a part of the length and for the lateral bridges 28A it extends on the contrary in its entirety. More precisely, the indentation 44A presented by the central bridge 28A only extends in the middle part of its length, between the two chimneys 30 at a distance thereof, and, on the contrary, the indentation 44B that the lateral bridges 28B present. it extends over its entire length, passing through the corresponding chimney 30 from part to part. For the central bridge 28A, the indentation 44A extends as close as possible to the wall 43A the innermost one. For the side bridges 28B, the indentation 44B extends markedly to s e d i s t a n c i a between the walls 43B. As already indicated above, the cable holder 26 according to the invention is connected to the bottom wall 16 of the box 11. It is and is fastened with the help of two screws 38 at the rate of one per chimney. In practice and as shown, the plane of symmetry M of the cable clamp 26 then extends parallel to the direction of elongation of the casing 11. More precisely, the central bridge 28A of the cable clamp 26 is it then finds substantially parallel to one of the transverse surfaces 20 of the hood 18 of this box 11, close to it and therefore corresponds to an axial outlet for the electric cable 23.

Consequently, the lateral bridges 28B then extend slightly obliquely with respect to the longitudinal surfaces 19 of the hood 18 of the box 11, in the vicinity of this and correspond to each respectively a lateral outlet for the electric cable 23 Outer covers 47A, 47B are provided correspondingly on the transverse surface 20 concerned of the hood 18 and on its longitudinal surfaces 19. For example, these are openable covers which are to be cut off or to be trimmed.

In Figures 1, and 2, it has been assumed that the seal 47A, of the transverse surface 20 has been removed. For each of the chimneys 30 of the cable holder 26, the box 11 also has projections on its bottom wall 16, that is to say on the projection 15 on the base 15 forming this bottom wall 16, a pawn 48, in which the cable holder 26 is coupled by a chimney 30. This pin 48, which is a concavity, serves as a housing for a perforated insert 49 with which the box 50 of the co-operating screw 38 is in a screw connection. For each of the bridges 28A, 28B of the cable holder 26, the box 11 also has a protrusion on its bottom wall 16, a rib 51A, 51B, which extends parallel to the walls 43A, 43B of a bridge 28A, 28B, between those walls 43A, 43B. Along its free edge, this rib 51A, 51B has a recess 52A, 52B which, in the manner of the recess 40A, 40B of the bridges 28A, 28B of the cable holder 26, has an outline in a circle arc, although following a concavity that is turned in the opposite direction to that of the latter. The rib 51A corresponding to the central bridge 28A of the cable holder 26 extends from one to the other of two discs 53 which, parallel to each other and perpendicular to this rib 51A, are each respectively disposed at a distance from the two pawns 48, between they. The two ribs 51B which correspond to the two lateral bridges 28B extend on the contrary each one respectively from the two pawns 48.

Preferentially, and this is the case in the repurposed embodiment, between the cable holder 26 and the bottom wall 16 of the casing 11, tilting means 54 are involved. In the embodiment shown, these tilting means 54 tolerates, on the lower surface 31A of the central bridge 28A of the cable holder 26, a tilting projection 55 in the shape of a dihedron and in which the edge extends parallel to the elongation direction of this central bridge 28A, on one side to another of each of the chimneys 30 and by which the cable holder 26 is able to carry on the bottom wall 16 of the box 11, and, jointly, there is a set J between each of these chimneys 30 of the cable clamp 26 and the corresponding pawn 48 of the casing 11, at least transversely to the corresponding pivot axis, that is at least following a perpendicular direction to the central bridge 28A, as shown in figure 11 for one of these c himeneas 30 and for one of those pawns 48. In summary, in the represented embodiment, the box 11 presents, in projection on its bottom wall 16, and, therefore, in projection on the base 15 that forms this wall 16, a connection terminal 56 to which each of the electrical conductors 25 of the electric cable 23 have respectively been connected. In the embodiment shown, this connection terminal 53 extends at a distance from the cable holder 26. Without However, due to the divergence between the side bridges 28B, if desired this may be more or less coupled between the latter. For the connection of the electric cable 23, it is necessary to proceed with the positioning of the cable clamp 26. In fact, it is necessary that the electric cable 23 be coupled to one or the other of the bridges 28A, 28B, of this cable clamp 26. After the connection of the electric cable 23, the cable holder 26 is put back in its place. In figures 1 to 9 it is assumed that the electric cable 23 is coupled to the central bridge 28A of the cable holder 26. The orientation imposed on the electric cable 23 then corresponds to an axial outlet for it.

It will be noted that the walls 43A of the central bridge 28A of the cable holder 26, on the one hand and the rib 51A corresponding to the box 11, on the other hand, then impose a zigzag path on the electric cable 23 for the benefit of its retention. In figures 10 to 14 it has been assumed, as a variant, that the electric cable 23 is coupled to one or the other of the lateral bridges 28B of the cable holder 26. The orientation imposed in this way to the electric cable 23 then corresponds to an output lateral for this one. As mentioned above and as can be seen in figure 13, the walls 43B of the mentioned lateral bridge 28B, on the one hand and the rib 51B corresponding to the box 11, on the other hand, impose a zigzag path on the electric cable 23 Preferably 1, for a lateral exit of the electric cable 23, the adjustment of the screws 38 is followed until the cable holder 26 goes to the bottom wall 16 of the box 11 by its curved projection 1 ami 55. Now Well, by construction, this projection of base 1 am 55 is located away from the axis of the pawns 48, and therefore, away from the plane according to which the screws 38 exert their effect. Then, the cable holder 26 tilts more or less in the direction of the recess 52B of the ribs 51B, if as shown in FIG. 14, the electrical cable 23 has a diameter small enough to be in contact with the cable. the bottom wall 16 of the box 11 before coming into contact with it. Of course, the body 1 of my cable clamp 26 can be made in the opposite direction of the previous one if, on the contrary, and as shown in figure 11, the electric cable 23 has a diameter that is important enough for it to take contact with this before making contact with the bottom wall 16 of the box 11. But, in all cases, the electric cable 26 is energetically adjusted. In the same way, in both cases, the tilting of the cable holder 26 is authorized by the indentation 44B of the lateral bridges 28B, these are coupled by this indentation 44B to the ribs 51B of the box 11. On the other hand, it should be noted that if desired, the cable holder 26 according to the invention, allows with great advantages to simultaneously adjust, in at least two different directions, at least two different electrical cables; These are an electrical power cable and at least one electrical repair cable. In the variant embodiment shown in FIG. 15, the bottom wall 16 of the box 11 has, in protrusion, at the base of pawns 48, a rib 58 that extends from one part of its pawns 48 to another, going mainly to the discs 53 that flank the rib 51A at its ends. This rib 58 is intended to serve as a support for the cantilevered projection 1 to 55 of the cable clamp 26, whose plan of tilt 1 is thus slightly raised, without the way of positioning of this cable clamp 26 being modified. . Then, in a broader sense, "bottom wall 16" should be understood, mainly when it is indicated that the tilting projection 55 of the cable holder 26 goes to this bottom wall 16, then it should be understood as tolerating the current. For this reason the rib 58.

Furthermore, in this variant of embodiment, other protruding ribs are provided in the bottom wall 16 of the box 11, in order to make this bottom wall rigid 16. Of course, the present invention is not limited to the embodiments described and represented, but includes any variant of execution. In particular, instead of tolerating a tilting projection in the s u c a - c a b 1 e, the tilting means intervening between this cable and the box could also tolerate a tilting projection in this box.

Claims

l. A holder - cab 1 e, which is intended to equip the box of any electrical device, which is of the type of those that tolerate a bridge suitable for an attachment of the electric cable to be connected to this electrical device, characterized because, it is required to impose on the electric cable concerned, one or other of at least 2 different orientations, the tolerance, of a single piece at least two bridges whose elongation directions are in themselves different, namely, a bridge so called central bridge and at least one bridge so called lateral bridge, with, for its attachment to the electrical appliance box, at least one chimney.
2. The cable clamp according to claim 1, characterized in that the chimney extends noticeably and perpendicularly in the plane of the bridges.
3. The cable clamp according to any of claims 1, 2, characterized in that, at its inlet outlet, the chimney has a neck of cross section lower than the passage section that it has in its current part.
4. The cable clamp according to any of claims 1 to 3, characterized in that the chimney intervenes in a remarkable manner at the junction of the central bridge with the lateral bridge.
5. The cable clamp according to any of claims 1 to 4, characterized in that the lateral bridge lies with the central bridge at an angle (A).
6. The cable clamp according to claim 5, characterized in that the lateral bridge lies with the central bridge an angle (A) slightly greater than 90 °.
7. The cable clamp according to any of claims 1 to 6, characterized in that at least one of the bridges has at least one recess in its lower surface.
8. The holder according to claim 1 characterized in that one of the parts has at least one recess in its lower surface.
9. The cable holder according to any of the above indications 1 to 8, characterized in that at least one of the bridges tolerates, in concavity on its lower surface, a cavity, in which it results that it forms, remarkably and in parallel to its direction of elongation, and remarkably and in parallel to each other, two walls.
10. The cable clamp according to claim 9, characterized in that each of the bridges tolerates a cavity in a concavity in its lower face.
11. The cable holder according to any of claims 1 to 10, characterized in that at least one of the bridges tolerates, in a concavity on its lower surface, a indentation, remarkable and parallel to its direction of elongation, extends in at least a part of its length.
12. The cable holder according to claim 11, characterized in that each of the bridges tolerates a drain in a concavity in its lower surface.
13. The cable holder according to claim 12, characterized in that for the central bridge, the indentation only extends over a part of the length and, for the lateral bridge, the indentation extends throughout the latter.
14. The cable clamp according to any of claims 1 to 13, characterized in that following a general configuration in U tolerates three bridges, that is, a central bridge and two lateral bridges.
15. The cable clamp according to claims 6 and 14, taken together, characterized in that the lateral bridges diverge from each other from the central bridge.
16. The cable clamp according to claims 4 and 14, taken together, characterized in that it tolerates two chimneys, one at the junction of the central bridge with one of the lateral bridges and the other at the junction of this central bridge with another of the bridges lateral
17. The cable clamp according to claims 13, 14 and 16, taken together, characterized in that the indentation of the central bridge extends only in a medium part of its length, between the two chimneys at a distance from them, and the indentation that present the lateral bridges extends in the totality of its length, crossing the corresponding chimney.
18. The cable clamp according to any of claims 14 to 17, characterized in that it has a plane of symmetry (M) that, perpendicular to its central bridge, passes through the median zone thereof.
19. An electrical appliance of the kind to which an electric cable is connected, when equipping its box for the maintenance of this electric cable, contains a cable clamp characterized in that said cable clamp is according to any of claims 1 to 18.
20. The electrical device according to the indicated indication 19, characterized in that its box having a bottom wall, the cable holder is related to this bottom wall.
21. The electrical apparatus according to claim 19, characterized in that each of the chimneys, of the clamp-cab 1 e, the box present, protruding on its bottom wall, a pawn, in which the cable clamp is coupled by a chimney .
22. The electrical apparatus according to any of claims 19 to 21, characterized by each of the bridges of the holder-cab 1 e, box has, in protrusion on its bottom wall a rib, which extends in parallel to the walls of the wall. a bridge, between those walls.
23. The electrical device according to claim 22, characterized in that each rib, which tolerates the box has a recess along its free edge.
24 The electrical apparatus according to any of the recitations 20 to 23, characterized in that between the cable clamp and the bottom wall of the casing, media of b a s c a 1 a m e n t o.
25. The electric appliance according to claim 24 characterized in that the swinging means tolerate, on the lower surface of the central bridge of the clamp-cab 1 e, a tilting projection by means of which the cable clamp is apt to carry on the bottom wall of the box, and jointly, there is a set (J) between each of the chimneys of the cable-holder and the corresponding pawn of the box, at least transversally with respect to the corresponding pivot axis.