BS 4066-3 Tests on electric cables under fire conditions — Part 3: Tests on bunched wires or cables

1.1 Scope

This Technical Report describes a method of type approval testing to define the ability of bunched cables to restrain flame propagation in defined conditions regardless of their application, i.e. power, telecommunications (including data transmission and optical fibre cables), etc. Three categories are defined and distinguished by test duration, and the volume of non-metallic material of the sample under test (see Table 1); they are not necessarily related to different safety levels in actual cable installations. Category A has two designations for the method of mounting.

1.2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions of this Technical Report. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this Technical Report are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.

IEC 332-1:1979, Tests on electric cables under fire conditions — Part 1: Test on a single vertical insulated wire or cable.
IEC 332-2:1989, Tests on electric cables under fire conditions — Part 2: Test on a single small vertical insulated copper wire or cable.
IEC 811-1-3:1985, Common test methods for insulating and sheathing materials of electric cables — Part 1: Methods for general application — Section 3: Methods for determining the density — Water absorption tests — Shrinkage test.