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GB/T 19666-2005 (GB/T19666-2005)

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GB/T 19666-2005: PDF in English (GBT 19666-2005)
GB/T 19666-2005
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.060.20
K 13
Flame retardant and fire resistant wires and cables
ISSUED ON. FEBRUARY 6, 2005
IMPLEMENTED ON. AUGUST 1, 2005
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Content
Foreword ... 3 
1 Scope ... 5 
2 Normative References ... 5 
3  Terms and definitions ... 6 
4  Type ... 6 
5  Combustion characteristic requirements ... 10 
6  Technical requirements ... 12 
7  Acceptance rules ... 14 
Annex A (Informative) Example of relevant wire and cable products ... 15 
Annex B (Informative) Halogen free low smoke flame retardance
insulation and sheath technical performance ... 16 
Annex C (Informative) Technical performance of fire resistant mica tape
for wires and cables ... 18 
Foreword
Flame retardant and fire resistant wires and cables, including halogen,
halogen-free, low smoke and other products, have been produced and used in
China for more than ten years, and play an important role in fire safety.
However, as there is no international standard nor national standard, therefore,
there is no unified product names, models, technical requirements, test
methods, etc.; and some are even inconsistent with international requirements.
This Standard is developed so as to unify the domestic production and
application, and meet the needs of international trade and exchange on
economy and technology.
Considering that the flame retardance, fire resistance and other requirements
cover almost all of wire and cable products, it generally does not need to
change the structure of wire or cable but the materials used to achieve this
objective. Therefore, it does not develop product standards one by one.
Instead, this General Rule is made to specify the requirements on flame
retardance, fire resistance and other combustion characteristics which are
different from the existing ordinary product standards. It recommends the
flame retardant and fire resistant materials that may be adopted. And relevant
marks are added in front of the common product model, so as to distinguish it
from ordinary products.
In this Standard, all test methods and performance requirements on
halogen-free, low smoke, flame retardant and fire resistant characteristics use
the following latest international standards.
IEC 60331.1999 Circuit integrity test of cable or optical cable under flame
conditions
IEC 60332.2000 Burning test of cable or optical cable under flame
conditions
IEC 60754.1997 Test methods for the release of gases in the burning of the
materials from cable or optical cable
IEC 61034.1997 Measurement of burning smoke density of cable or optical
cable under specified conditions
This General Rule shall be used as product standard. For the compilation of
individual-series product standard, the relevant content must comply with the
provisions of this General Rule.
In this Standard, Annex A, Annex B and Annex C are informative.
Flame retardant and fire resistant wires and cables
1 Scope
This Standard specifies the models, technical requirements, test methods and
acceptance criteria for flame retardant and fire resistant wires and cables,
including halogen-containing, halogen free, low smoke and other
characteristics. This Standard applies to the halogen, halogen free and low
smoke flame retardant and fire resistant wires and cables.
2 Normative References
The following standards contain the provisions which, through reference in this
Standard, constitute the provisions of this Standard. For dated references, the
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard. However, the parties who enter into agreement based on this
Standard are encouraged to investigate whether the latest versions of these
documents are applicable. For undated reference documents, the latest
versions apply to this Standard.
GB/T 17650.2-1998 Test on gases evolved during combustion of materials
from cables - Part 2. Determination of degree of acidity of gases by
measuring pH and conductivity (idt IEC 60754-2.1991)
GB/T 17651.2-1998 Measurement of smoke density of cables burning
under defined conditions - Part 2. Test procedure and requirements (idt
IEC61034-2.1997)
GB/T 18380.1-2001 Tests on electric cables under fire conditions - Part 1.
Test on a single vertical insulated wire or cable (idt IEC 60332-1.1993)
GB/T 18380.2-2001 Tests on electric cables under fire conditions - Part 2.
Test on a single small vertical insulated copper wire or cable (idt IEC
60332-2.1989)
GB/T 18380.3-2001 Tests on electric cables under fire conditions - Part 3.
Tests on bunched wires or cables (idt IEC60332-3.1992)
GB/T 19216.21-2003 Tests for electric cables under fire conditions - Circuit
integrity - Part 21. Procedures and requirements - Cable of rated voltage up
to and including 0.6/1.0 kV (idt IEC 60331-21.1999)
GB/T 19216.23-2003 Tests for electric cables under fire conditions - Circuit
integrity - Part 23. Procedures and requirements - Electric data cables (idt
IEC 60331-23.1999)
IEC 60332-3-25.2000 Tests on electric cables under fire conditions - Part 25.
Test for vertical flame spread of vertically-mounted bunched wires or cables
- Category D
3 Terms and definitions
3.1 Flame retardance
It refers to the characteristics of flame spreading above the sample only in
limited range and extinguishing by itself when the sample is burned and fire
source is removed under specified test conditions, i.e. the ability to prevent or
delay occurrence or spreading of flame.
3.2 Fire resistance
The ability to continuously run under a specified condition when burning under
the prescribed fire and at prescribed time, i.e. the ability to maintain the
integrity of the circuit.
3.3 Halogen free
Not containing halogen, the corrosivity of combustion products is weak.
3.4 Low smoke
It produces less smoke when it is burning, namely, the light transmittance
(visibility) is higher.
4 Type
4.1 Composition of types
The model of flame retardant and fire resistant wire and cable is composed of
the product combustion characteristics code and the relevant wire and cable
model, as shown in Figure 1.
Relevant wires and cables models
Product combustion characteristic codes
Figure 1 Model composition of flame retardant and fire resistant wires and cables
Y - Polyethylene or polyolefin insulation or sheath;
YJ - Cross-linked polyethylene or cross-linked polyolefin insulation or
sheath;
3 - Polyethylene or polyolefin external sheath;
4 - Cross-linked polyethylene or flexible external sheath;
6 - Non-magnetic metal band armored;
7 - Non-magnetic metal wire armored;
4.4 Product representation method
The product is represented by "Model, specification and standard number /
relevant product standard number". Refer to Annex A for the relevant product
standards.
Example 1. Polyvinyl chloride insulated polyvinyl chloride sheath Category A
flame retardance power cable is.
ZA-W Specification (omitted) GB/T 19666-2005/GB/T
12706.1-2002
Example 2. Cross linked polyethylene insulated polyvinyl chloride sheath
Category B flame retardance power cable is.
ZB-YJV Specification (omitted) GB/T 19666-2005/GB/T
12706.1-2002
Example 3. Cross linked polyethylene insulated polyvinyl chloride sheath
Category C flame retardance power cable is.
ZCN-YJV Specification (omitted) GB/T 19666-2005/GB/T
12706.1-2002
Example 4. Cross-linked polyethylene insulated polyolefin sheath halogen free
low smoke Category B flame retardance power cable is.
WDZB-YJY Specification (omitted) GB/T 19666-2005/GB/T
12706.1-2002
Example 5. Polyvinyl chloride insulated Category D flame retardance wires for
fixed wiring is.
ZD-BV Specification (omitted) GB/T 19666-2005/GB
5023.3-1997
Table 4 Group flame retardance performance requirements
Code
Volume of
non-metallic material
of sample (L/m)
Fire
provision
time s
Qualification standard Test methods
ZA 7 40 1) Charring length on the sample shall
not exceed 2.5m from the bottom of
the nozzle;
2) After the fire is stopped, flaming time
for sample shall not exceed 1h.
GB/T 18380.3
IEC 60332-3-25
ZB 3.5 40
ZC 1.5 20
ZDa 0.5 20
a ZD applies to wires and cables of which the outside diameter of sample is not more than 12mm.
5.2 Fire resistance performance requirements
Fire resistance performance must comply with the requirements in Table 5.
Table 5 Fire resistance performance requirements
Code Application scope
Fire-supplying
time + cooling
time /min
Test
voltage /V
Qualification
standard
Test
methods
0.6/1kV-and-
below cable 90+15
Rated
value
1) 2A fuse does not
burn;
2) LEDs do not turn
off
GB/T
19216.21
Data cable 90+15
Relevant
to earth.
110±10
1) 2A fuse does
not burn;
2) LEDs do not
turn off
GB/T
19216.23
Notes. supplying temperature is .
5.3 Halogen free p...
......
 
(Above excerpt was released on 2016-04-18, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GBT19666-2005