Regulation No. 118-03 Proposal

Name:Regulation No. 118-03 Proposal
Description:Burning Behaviour of Materials. Proposal for the 03 Series.
Official Title:Proposal for the 03 Series of Amendments to Regulation No. 118 (Burning Behaviour of Materials).
Country:ECE - United Nations
Date of Issue:2016-12-21
Amendment Level:Original
Number of Pages:7
Information:Published as Regulation No. 118-03
Vehicle Types:Bus, Component
Subject Categories:Drafts and Proposals (Historical)
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Text Extract:

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Paragraphs 5.2.1. and 5.2.2., amend to read:
"5.2.1. The materials inside and no more than 13mm beyond the interior compartment, materials of
the engine compartment, materials of any separate heating compartment and electric
cables, cable sleeves or cable conduits used in the vehicle to be type approved shall meet
the requirements of Part II of this Regulation.
5.2.2. The materials and/or equipment used in the interior compartment, the engine compartment
and any separate heating compartment and/or in devices approved as components, electric
cables and cable sleeves or cable conduits used in the vehicle shall be so installed as to
minimize the risk of flame development and flame propagation."
Paragraph 6.2.6., amend to read:
"6.2.6. Any electrical cable exceeding a length of 100mm used in the vehicle shall undergo the
resistance to flame propagation test described in Annex 10 to this Regulation. As
an alternative to these requirements, the test procedure described in ISO
Standard 6722-1:2011, Paragraph 5.22. may be applied.
Test reports and approvals of components obtained according to ISO 6722:2006,
Paragraph 12. shall remain valid.
The exposure to the test flame shall be finished:
(1) For single-core cables:
When the conductor becomes visible, or
After 15s for cables with conductor sizes less or equal than 2.5mm , and
(c) After 30s for cables with conductor sizes greater than 2.5mm ,
(2) For sheathed, screened and unscreened single- or multi-core cables with a sum of
conductor sizes smaller than or equal to 15mm :
Until a conductor becomes visible or for 30s, for all cables, whichever comes
(3) For sheathed, screened and unscreened single- or multi-core cables with a sum of
conductor sizes greater than 15mm :
According to (1) or (2), whichever is applicable.
Electrical cables according to (2) may be tested either completely or separately.
Electrical cables according to (3) shall be tested separately.
The result of the test shall be considered satisfactory if, taking into account the worst test
result, any combustion flame of insulating material shall extinguish within 70s and a
minimum of 50mm insulation at the top of the test sample shall remain unburned."

Annex 8,
Paragraph 2.1., amend to read:
"2.1. The specimen holder shall consist of a rectangular frame of 560mm high and shall have two
rigidly connected parallel rods spaced 150mm apart on which pins shall be fitted for
mounting the test specimen which is located in a plane at least 20mm from the frame. The
mounting pins shall be not greater than 2mm in diameter and at least 40mm long. The pins
shall be located on the parallel rods at locations shown in Figure 1. The frame shall be fitted
onto a suitable support to maintain the rods in a vertical orientation during testing (for the
purpose of locating the specimen on the pins in a plane away from the frame, spacer stubs
2mm in diameter may be provided adjacent to the pins).
The specimen holder shown in Figure 1 may be modified in width to allow the fixation of the
To fix the sample in a vertical position, a support may be provided consisting of 0.25mm
diameter heat resistant wires that horizontally span the sample at 25mm intervals along the
complete height of the specimen holder. Alternatively, the sample may be fixed by additional
clamps to the specimen holder."
Paragraph 2.3., amend to read:
"2.3. The test apparatus may be placed in a fume cupboard assembly. The size and shape of the
fume cupboard shall be such that the test results are not affected. Before the test, the
vertical velocity of the air through the fume cupboard shall be measured 100mm in front of
and behind the final position where the test apparatus will be located. It shall be between
0.10 and 0.30m/s in order to avoid possible discomfort, by combustion products, to the
operator. It is possible to use a fume cupboard with natural ventilation and an appropriate air
Paragraphs 3.1. and 3.2., amend to read:
"3.1. Materials according to Paragraph 6.2.3. of this Regulation: The samples dimensions are
560mm × 170mm.
If the dimensions of a material do not permit taking a sample of the given dimensions the
test shall be carried out taking a sample having the dimensions of at least 380mm in height
and at least 3mm in width.
Cable sleeves and cable conduits: The samples dimensions are: length: 560mm, but at
least 380mm if the dimensions of a material do not permit taking a sample of the given
dimensions; width: actual component dimension.
3.2. Materials according to Paragraph 6.2.3. of this Regulation: When the thickness of the
sample is more than 13mm, it shall be reduced to 13mm by a mechanical process applied to
the side which does not face the respective compartment (interior, engine or separate
heating compartment). If it is impossible, the test shall be carried out in accordance with the
Technical Service the initial thickness of the material, which shall be mentioned in the test
report. Composite materials (see Paragraph 6.1.3.) shall be tested as if they were of uniform
construction. In the case of materials made of superimposed layers of different composition
which are not composite materials, all the layers of material included within a depth of
13mm from the surface facing towards the respective compartment shall be tested

2. Sampling and Principle
2.1. Five samples shall undergo the test
3. Samples
3.1. Test samples shall have a length of at least 600mm of insulation.
4. Procedure
Determine the resistance to flame propagation using a Bunsen burner with an appropriate
gas, having a combustion tube of 9mm internal diameter, where the flame temperature at
the tip of the inner blue cone shall be (950 ± 50)°C.
Suspend the test sample in a draught-free chamber and expose the test sample to the tip of
the inner cone of the flame, as shown in Figure 1. The upper end of the cable shall point
away from the closest wall of the chamber. The sample shall be subject to a stress, e.g. by
means of a weight over a pulley, in order to keep it straight at all times. The angle of the
cable shall be 45° ± 1° relative to the vertical line. In any case, the shortest distance of any
part of the sample shall be 100mm minimum from any wall of the chamber. Apply the flame
with the tip of the inner blue cone touching the insulation (500 ± 5)mm from the upper end of
the insulation.
1 Test sample
2 Bunsen burner
Figure 1
Apparatus for Resistance to Flame Propagation"
(Dimensions in millimetres)
Burning Behaviour of Materials. Proposal for the 03 Series.