IEC 61156-5 pdf download

IEC 61156-5 pdf download Multicore and symmetrical pair/quad cables for digital communications – Part 5: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz-horizontal floor wiring – Sectional specification
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in IEC 61 1 56-1 apply.
4 Installation considerations
4.1 General remarks
Installation considerations are defined in Clause 4 of IEC 61 1 56-1 .
4.2 Bending radius of installed cable.
The bending radius of the installed cable shall not be less than 4 times the outside diameter
of the cable.
4.3 Climatic conditions
Under static conditions, the cables shall operate in the temperature range from –40 °C to +60 °C. The conductor and cable temperature dependence is specified for screened and unscreened cables and should be taken into account for the design of an actual cabling system. Other temperature ranges may be specified in the relevant detail specification. 5 Materials and cable construction
5.1 General remarks
The choice of materials and cable construction shall be suitable for the intended application and installation of the cable. Particular care shall be taken to meet any requirements for EMC and fire performance (such as burning properties, smoke generation, evolution of halogen gas, etc.).
5.2 Cable construction The cable construction shall be in accordance with the details and dimensions given in the relevant detail specification.
5.2.1 Conductor The conductor shall be a solid annealed copper conductor, in accordance with 5.2.1 of IEC 61 1 56-1 and should have a nominal diameter between 0,4 mm and 0,65 mm. A conductor diameter of up to 0,8 mm may be used
5.2.2 Insulation
The conductor shall be insulated with a suitable material. Examples of suitable materials are:
– polyolefin;
– fluoropolymer;
– low-smoke zero-halogen thermoplastic material.
The diameter of the insulated conductor shall be indicated in the relevant detail specification.
5.2.3 Cable element
The cable element shall be a twisted pair or quad.
5.2.3.1 Screening of the cable element
When required, the screen for the cable element shall be in accordance with 5.2.3.2 of IEC 61 1 56-1 .
5.2.4 Cable make-up
A spacer may be used to separate the cable elements. The cable elements, including
spacers, shall be assembled to form the cable core.
The core of the cable may be wrapped with a protective layer of non-hygroscopic and nonwicking material.
5.2.5 Screening of the cable core
When required by the relevant detail specification, a screen for the cable core shall be provided.
The screen shall be in accordance with 5.2.5 of IEC 61 1 56-1 .
5.2.6 Sheath
The sheath material shall consist of a suitable material.
Examples of suitable materials are:
– polyolefin;
– PVC;
– fluoropolymer;
– low-smoke zero-halogen thermoplastic material.