IEC - 61156-1-4
Multicore and symmetrical pair/quad cables for digital communications - Part 1-4: Assessment of conductor heating in bundled cables due to the deployment of remote powering
|Publication Date:||1 October 2018|
|ICS Code (Wires and symmetrical cables):||33.120.20|
This document specifies a method to assess the thermal behaviour of cables arranged in bundles, for digital communications. A method is described to determine the temperature increase in cable bundles for certain remote powering currents as a basis to analyse the expected performance under several test arrangements described in standards dealing with the installation of cabling systems (e.g.  1, ).
It is only intended to provide guidance to assess the thermal behaviour of cables for digital communications in reference environmental conditions and arrangements. It is therefore not intended to become a type of test method.
The following test arrangements are considered:
c) free air;
d) cable tray;
f) conduit with sealed ends.
Even though this document covers four-pair data grade cables, the same principles can be applied to other cable types.
1 Numbers in square brackets refer to the Bibliography.