DE1490118C - Cable with concentric protection or Neutral conductor - Google Patents

Description

3 4

It is also already known to pull an electrical line device which cranks the wires and

(German Auslegeschrift 1 049 453) to be placed on the cable core with an

arranged half of a metallic casing This prevents that when up and down

Drain wire. This additional wire is corrugated so that its coiled wires that have already been cranked out of the crank.

Length is greater than that of the cable core and is pulled onto this 5.

Way the wire itself is free from tensile stress will. A concentric protective or neutral or neutral conductor made of the cranked wires, which in conductor from such wires is not provided here. axially parallel direction is only

In special cases it has proven to be advantageous to use the same amount of conductor material,

pointed out the concentric protective conductor from several io which is otherwise used in the manufacture of a concentric

Manufacture wire layers. In this way it is possible to have a protective or neutral conductor of a known type.

borrowed to further increase the protective effect and because the additional material costs for the

To reduce cross-sections of the individual wires, which corresponds to the axially parallel wire arrangement.

an increase in flexibility can benefit. the additional cost of materials that the

Appropriately, the upper layer of the rope of the smooth wires has always been cranked up to now Has wires either with a non-conductive calls.

Tape or - to increase the transverse conductivity. The invention is based on that in the figure

of the concentric protective or neutral conductor - with the branch point shown as an exemplary embodiment

a conductive band explained in more detail in open or closed.

Coil covered. Over it then lies the plastic ao The individual wires 1 of the concentric protective sheath, or neutral conductor are uncut at the junction

The crimping of the individual wires of the concentrate is lifted from the cable core so that the underneath Fresh conductor can be in a separate working phase of the common core sheath 2 lying respectively. The cranked wires are head 3 accessible. The lifted singles Coils are wound and then pulled off again. The wires can be pulled into one or more groups and applied to the cable core. Advantageously summarized and closed by branch terminals it is, however, that the wires that are still bent over are clamped together by one.

1 sheet of drawings

Claims (4)

1 2 or neutral conductor has in a known cable patent claims: construction (USA.-Patent 2 258 687) the shape of a helix encompassing the cable core with alternating 1. Cable with plastic insulation and artificial lay direction. So with this execution Fabric sheath in which the cable core with a 5 of the concentric protective or neutral conductor at the point concentric protective or neutral conductor is encased,. of a branch uncut with the head of the It is the one that can be connected from corrugated or cranked and parallel outgoing cables len wires, identified by the fact that they are required and provided that the individual that each wire in one plane each wires the concentric conductor from the to the is corrugated or cranked, the tangential cable ends adjoining the io area of the junction Cable core and the wires must be pulled out with it. Apart from this, Longitudinal direction essentially parallel to the cable car that during the rough operation on the assembly points Belachs are arranged. and the wires required by the assembly staff 2. Cable according to claim 1, characterized by more or less strong tensile stresses, that the concentric protective or 15 are set, can be done through the required post-neutral consists of several wire layers, pull the individual wires in the known spiral 3. Cable according to claim 1 or 2, characterized ge construction irregularities in the coverage indicates that at least over the outer result, so that the protective effect of the concentric wire layer at least one counter-helix arranged conductor is in question. Just an Abnet is. ao lift the concentric head is at the point 4. Method of making a cable according to possible where the wires of the concentric conductor one or more of claims 1 to 3, change their direction of impact, but is sufficient. once characterized in that the length freed up here does not include a branch during manufacture of the concentric protective or neutral conductor, on the other hand, this point is from the outside in the smooth state a device for cropping 35 is not visible and when it is, is not always straight go through and in the same work step on this point due to the external conditions, Cable core are placed. z. B. Existing sewers and the like, a cable branch be possible at all. The invention is based on the object of the 30 concentric protective or neutral conductor of an electrical . see cables to be trained in such a way that the required The protective effect of this conductor is also ensured during the manufacture of cable branches and the assembly of the The present invention is concerned with tapping itself being improved. According to the Erfin cable With plastic insulation and plastic jacket, this object is achieved in that each tel, in which the cable core with a concentric wire of the concentric protective or neutral conductor in Protective or neutral conductor is encased, which is corrugated or cranked from corrugated each one level, the tangential or cranked and parallel wires. tial to the cable core and the wires with Cable, which is used to supply electrical power from their longitudinal direction essentially parallel to taker, e.g. B. Households, manufacturing facilities and 4 ° cable axis are arranged. The bare single thegl. serve, as is well known, exist z. B. from the wires can also be used in the case of Kadrei that has already been laid in the ground Phase conductors and one of these the cable core leg without difficulty after removing the Umbildenden The concentric sheath surrounding the phase conductor is lifted upwards and or protective conductor can be connected from a concentric refraction layer. The protective effect conductor wires arranged to the cable core. At this 45 of the conductor in the adjacent cable by covering Due to their assignment, cables are retained, especially the cable core, as they are retightened as a so-called house connection cable, considerable demands are placed on the wires from the adjacent cable if transferred, which is essentially due to it. only required to an insignificant extent are that where these cables are laid is at. The corrugation or cranking of the individual wires leaves For example, following the course of a street, after that an extension is already closed without it being closed Long-term damage, e.g. from earthworks, stretching of the individual wires with reduced cross-section not can be ruled out and therefore a reassurance comes. protection must be secured in any case. This in and of itself is known to use stranded wires, Protection against contact must also be retained, which are corrugated in a plane that is tangential if, as is the rule with such cables, a 55 of the cable core is applied (German patent 824 961), depending on the multitude of branches z. B. for house connections, but these strands are used in rubber layers are embedded, in addition, the electrical conductivity of these To improve the large number of junction layers that may be present. They are different from the brings the further requirement for a simple invention no free conductor from the cable core Assembly and a protective or neutral conductor with it, 60 can be lifted and used as a protective or neutral which serve without interruption in the area of the branch conductors, but under the influence of outside put friable strands on the corresponding head of the outgoing mechanical action, the Cable can be connected. can only be used as message lines Are already known cables initially described NEN. The electrically effective cross-section of this lit- Kind in which the cable core of a so-called 65 zen does not correspond to that of a concentric one House connection or mains cable from a concen, protective or neutral conductor, which according to the regulations Irish protective or neutral conductor is surrounded. (ETZ-B, a full or half phase conductor to be Vol. 12, Issue 20, p. 478, right column). This protective speaking has.