DIN EN IEC 60794-1-124:2025-12

This document contains test procedures for evaluating the behaviour of microduct cabling (microduct optical cable, fibre unit or hybrid cable etc.) when blown into a microduct or protected microduct. This document describes two blowing track layouts: Method A consists of two mandrels and two long straight sections in between (same curvature); Method B consists of 3 mandrels. The middle mandrel forces the cable to experience both left- and right-hand bending, which is a feature of any realistic blowing route. In addition, this document describes an optional procedure to check the capability of blowing out an installed cable. This document describes the testing of microducts and cables for so-called network level 3 systems. This layer is also referred to as the feeder and return level and thus designates the section between data centers and the building transfer point. As a result this document does not apply to systems or combinations of microducts and cables intended for installation in buildings. The standard differs from DIN EN 60794-1-21 (VDE 0888-100-21):2021-03 as follows: a) addition of a blowing route (see Figure 2) which includes a change in the direction of curvature. This was achieved by introducing a third mandrel; b) addition of Annex A which shows a practical implementation of the blowing route; c) addition of Annex B which describes the so-called Crash Test; d) addition of Annex C which describes a cable blowing out procedure. The ability to blow in and blow out a cable, a fibre unit, or a microduct cabling into a microduct depends on a number of factors. For this reason, many users, network providers, and planning institutions insist on a sample test of the combination of these products used in the construction project. The test variant specified in this document as Method 2 allows for a realistic test of the combination of duct and cable used. It has demonstrated its practical relevance in extensive testing involving various users and manufacturers and was first published at the national level as VDE-AR-E 2888-100-24. This document now adopts the proposed text submitted by the German National Committee of the IEC to the IEC SC 86A committee.