IEC 60695-2-10:2000 pdf download.Fire hazard testing – Part 2-10: Glowing/hot-wire based test methods – Glow-wire apparatus and common test procedure
1 Scope
This part of IEC 60695 specifies the glow-wire apparatus and common test procedure to
simulate the effect of thermal stresses which may be produced by heat sources such as
glowing elements or overloaded resistors, for short periods, in order to assess the fire hazard
by a simulation technique.
The test described in this standard is applicable to electrotechnical equipment, its
subassemblies and components, and may also be applied to solid electrical insulating
materials or other solid combustible materials.
One of the responsibilities of a technical committee is, wherever applicable, to make use of
basic safety publications in the preparation of its publications.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 60695. For dated references, subsequent amendments
to, or revisions of, any of these publications do not apply. However, parties to agreements
based on this part of IEC 60695 are encouraged to investigate the possibility of applying the
most recent editions of the normative documents indicated below. For undated references, the
latest edition of the normative document referred to applies. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 60584-1 :1 995, Thermocouples – Part 1 : Reference tables
IEC 60584-2:1 982, Thermocouples – Part 2: Tolerances
IEC 60695-2-1 1 :2000, Fire hazard testing – Part 2-1 1 : Glowing/hot-wire based test methods –
Glow wire flammability test methods for end-products
IEC 60695-2-1 2:2000, Fire hazard testing – Part 2-1 2: Glowing/hot-wire based test methods –
Glow wire flammability test method for materials
IEC 60695-2-1 3:2000, Fire hazard testing – Part 2-1 3: Glowing/hot-wire based test methods –
Glow wire ignitability test method for materials
ISO 4046:1 978, Paper, board, pulp and related terms – Vocabulary
ISO/IEC 1 3943:2000, Fire safety – Vocabulary
3 Definitions
For the purposes of this part of IEC 60695, the definitions given in ISO/IEC 1 3943, as well as
the following definition, apply.
3.1 test temperature and temperature of the glow-wire
temperature to which the tip of the glow-wire is heated and stabilized prior to any contact with
the test specimen
4 Outline of the test apparatus and common test procedure
This part of IEC 60695 specifies the glow-wire apparatus and common test procedure as a fire
test using a non-flame ignition source.
The glow-wire is a specified loop of resistance wire, which is electrically heated to a specified
temperature. The tip of the glow-wire is brought into contact with a test specimen for a specific
period of time and a range of observations and measurements made, dependant upon the
particular test procedure.
A detailed description of each test procedure is given in IEC 60695-2-1 1, IEC 60695-2-1 2 and
IEC 60695-2-1 3.
5 Description of the test apparatus
5.1 Glow-wire
The glow-wire is made from nickel/chromium (80/20) wire, with an overall nominal diameter of
4 mm. The wire is formed into a loop as detailed in figure 1 .
The glow-wire is heated by a simple electric circuit as shown in figure 2. There shall be no
feedback mechanism or circuit to maintain the temperature.
Due to the high currents involved, it is essential that the electrical connections for the glow-wire
are capable of carrying the current without affecting the performance or long-term stability of
the circuit.
NOTE 1
The typical current necessary for heating the tip to a temperature of 960 °C is between 1 20 A and 1 50 A.
The test apparatus shall be so designed that the glow-wire is kept in a horizontal plane and that
it applies a force of 1 ,0 N ± 0,2 N to the test specimen during the application of the glow-wire.
The force shall be maintained at this value when the glow-wire or the test specimen is moved
horizontally one towards the other. The penetration of the tip of the glow-wire into and through
the test specimen shall be limited to 7 mm ± 0,5 mm.
IEC 60695-2-10:2000 pdf download
