GB/T 18380.12-2008 English PDF (GBT18380.12-2008)

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GB/T 18380.12-2008: Test on electric and optical fibre cables under fire conditions -- Part 12: Test for vertical flame propagation for a single insulated wire or cable -- Procedure for 1kW pre-mixed flame
GB/T 18380.12-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.060.20
K 13
GB/T 18380.12-2008 / IEC 60332-1-2:2004
Test on Electric and Optical Fibre Cables under Fire
Conditions - Part 12: Test for Vertical Flame
Propagation for a Single Insulated Wire or Cable -
Procedure for 1kW Pre-Mixed Flame
(IEC 60332-1-2:2004, IDT)
ISSUED ON: JUNE 26, 2008
IMPLEMENTED ON: APRIL 01, 2009
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 6
4 Test Devices ... 6
5 Test Procedures ... 6
6 Evaluation of the Test Result ... 8
Appendix A (Informative) Recommended Performance Requirements ... 11
Appendix B (Informative) Recommended Gas and Air Flowrate ... 12
Foreword
GB/T 18380 Test on Electric and Optical Fibre Cables under Fire Conditions can be
divided into the following 11 parts:
--- Part 11: Test for Vertical Flame Propagation for a Single Insulated Wire or Cable
– Apparatus;
--- Part 12: Test for Vertical Flame Propagation for a Single Insulated Wire or Cable
– Procedure for 1kW Pre-Mixed Flame;
--- Part 13: Test for Vertical Flame Propagation for a Single Insulated Wire or Cable-
Procedure for Determination of Flaming Droplets/Particles;
--- Part 21: Test for Vertical Flame Propagation for a Single Small Insulated Wire or
Cable - Apparatus
--- Part 22: Test for Vertical Flame Propagation for a Single Small Insulated Wire or
Cable - Procedure for Diffusion;
--- Part 31: Test for Vertical Flame Spread of Vertically-Mounted Bunched Wires or
Cables – Apparatus;
--- Part 32: Test for Vertical Flame Spread of Vertically-Mounted Bunched Wires or
Cables - Category A F/R;
--- Part 33: Test for Vertical Flame Spread of Vertically-Mounted Bunched Wires or
Cables - Category A;
--- Part 34: Test for Vertical Flame Spread of Vertically-Mounted Bunched Wires or
Cables - Category B;
--- Part 35: Test for Vertical Flame Spread of Vertically-Mounted Bunched Wires or
Cables - Category C;
--- Part 36: Test for Vertical Flame Spread of Vertically-Mounted Bunched Wires or
Cables – Category D.
This Part is Part 12 of GB/T 18380.
This Part equivalently adopts IEC 60332-1-2:2004 Test on Electric and Optical Fibre
Cables under Fire Conditions – Part 1-2: Test for Vertical Flame Propagation for a
Single Insulated Wire or Cable – Procedure for 1kW Pre-Mixed Flame (English
Version).
For the benefit of use, this Part made the following editorial modifications:
a) Delete the Foreword and Introduction of the international standard;
b) Add the Foreword for the national standard of this Part;
c) Add the appendix B;
d) Use the decimal point “.” to replace the comma “,” that is used for the decimal
point;
e) Use “Part 12” to replace “Part 1-2”;
f) The Clause 2 quotes Chinese national standards that adopt the international
standard rather than the international standard.
The Appendixes A and B of this Part are informative.
This Part was proposed by China Electrical Equipment Industry Association.
This Part shall be under the jurisdiction of National Technical Committee for
Standardization of Wires and Cables.
Drafting organization of this Part: Shanghai Electric Cable Research Institute.
Participating drafting organizations of this Part: Jinshan Electric Wire and Cable Ltd.
Tianjin; Baosheng Science and Technology Innovation Co., Ltd.; Shanghai Nanyang
Electrical Appliance Co., Ltd.; Shanghai Yalong Industry Group Co., Ltd.; and Anhui
Hualing Cable Group Co., Ltd.
Chief drafting staffs of this Part: Gong Guoxiang, Xiao Jidong, Zheng Guojun, Tang
Chongjian, Qu Wei, Lu Bangxiu, and Hu Guangzheng.
Test on Electric and Optical Fibre Cables under Fire
Conditions - Part 12: Test for Vertical Flame
Propagation for a Single Insulated Wire or Cable -
Procedure for 1kW Pre-Mixed Flame
1 Scope
This Part of GB/T 18380 specifies the test method for the vertical flame propagation of
a single wire or cable under flame conditions. The test device is specified in GB/T
18380.11-2008.
NOTE 1: If necessary, the test in GB/T18380.12-2008 can be carried out simultaneously with
the test in GB/T18380.13-2008.
The recommended performance requirements are given in Appendix A.
This Part specifies the conventional usage of 1kW pre-mixed flame. It is not applicable
to testing small-sized single wires and cables with a total cross-section area of less
than 0.5 mm2, because the conductors shall be melted before the end of the test; and
it is neither applicable to the small optical cables, because the optical cable shall break
before the end of the test. In these cases, the test method can refer to GB/T 18380.22-
2008.
NOTE 2: The use of wires and cables that can delay the spread of flames and meet the
requirements of this Standard is not sufficient to ensure that the wires and cables can prevent
the spread of flames under all laying conditions. Therefore, in some occasions with high risk of
spreading, for example in long vertical runs of bunches of cable, special installation precautions
shall also be taken. It shall not be considered that the cable sample meets the performance
requirements specified in this Standard, and the bundled cable shall also show similar
performance (see GB/T18380.31~18380.36 series of standards).
2 Normative References
The provisions in following documents become the provisions of this Part of GB/T
18380 through reference in this Part. For dated references, the subsequent
amendments (excluding corrigendum) or revisions do not apply to this Part, however,
parties who reach an agreement based on this Part are encouraged to study if the