1 Scope
This part specifies the product structure, general technical requirements, tests, acceptance rules, delivery length, marking and packaging of cross-linked polyolefin insulated wires and cables with rated voltages up to and including 450/750V.
This part is applicable to cross-linked polyolefin insulated wires and cables (copper conductor) with rated voltages up to and including 450/750V and with heat resistant requirements for fixed wiring and for internal connection of power and electronic equipment.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of JB/T 10491. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However parties to agreements based on this part 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.
GB/T 2900.10 Electrotechnical terminology - Electric cables (GB/T 2900.10-2001; idt IEC 60050 (461): 1984)
GB/T 2951.1-1997 Common test methods for insulating and sheathing materials of electric cables - Part 1: Methods for general application - Section one: Measurement of thickness and overall dimensions - Tests for determining the mechanical properties (idt IEC 60811-1-1: 1993)
GB/T 2951.2-1997 Common test methods for insulating and sheathing materials of electric cables - Part 1: Methods for general application - Section two: Thermal ageing methods (idt IEC 60811-1-2: 1985)
GB/T 2951.3-1997 Common test methods for insulating and sheathing materials of electric cable - Part 1: Methods for general application - Section three: Methods for determining the density - Water absorption tests - Shrinkage test (idt IEC 60811-1-3: 1993)
GB/T 2951.4-1997 Common test methods for insulating and sheathing material of electric cables - Part 1: Methods for general application - Section four: Test at low temperature (idt IEC 60811-1-4: 1985)
GB/T 2951.5-1997 Common test methods for insulating and sheathing materials of electric cables - Part 2: Methods specific to elastomeric compounds - Section one: Ozone resistance test - Hot set test - Mineral oil immersion test (idt IEC 60811-2-1: 1986)
GB/T 3956 Conductors of insulated cables (GB/T 3956-1997; idt IEC 60228: 1978)
GB/T 17650.2 Test on gases evolved during combustion of materials from cables - Part 2: Determination of degree of acidity of gases by measuring pH and conductivity (GB/T 37650.2-1998; idt IEC 60754-2: 1991)
GB/T 17651.2 Measurement of smoke density of cables burning under defined conditions - Part 2: Test procedure and requirements (GB/T 17651.2-1998; idt IEC 61034-2: 1997)
GB/T 18380.1 Tests on electric cables under fire conditions - Part 1: Test on a single vertical insulated wire or cable (GB/T 18380.1-2001; idt IEC 60332-1: 1993)
GB/T 18380.2 Tests on electric cables under fire conditions - Part 2: Test on a single small vertical insulated copper wire or cable (GB/T 18380.2-2001; idt IEC 60332-2: 1989)
GB/T 18380.3 Tests on electric cables under fire conditions - Part 3: Tests on bunched wires or cables (GB/T 18380.3-2001; idt IEC 60332-3: 1992)
JB/T 8137.1~4 Delivery drums for electric wires and cables
JB/T 10491.2-2004 Cross-linked polyolefin insulated wires and cables with rated voltages up to and including 450/750V - Part2: Cross-linked polyolefin insulated wires and cables for maximum conductor temperature of 105℃ in normal operation
JB/T 10491.3-2004 Cross-linked polyolefin insulated wires and cables with rated voltages up to and including 450/750V - Part 3: cross-linked polyolefin insulated wires and cables for maximum conductor temperature of 125℃ in normal operation
IEC 60332-3 Tests on electric cables under fire conditions - Part 3: Test on bunched wires or cables
3 Terms and definitions
For the purposes of this part, the terms and definitions given in GB/T 2900.10 and the following apply.
3.1 Terms
cross-linked polyolefin
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
3.1 Terms
3.2 Definitions
4 Symbols and codes
4.1 Symbols and codes
4.2 Product expressions
5 General requirements for cable structure
5.1 Conductor
5.2 Insulation
5.3 Filling
5.4 Sheath
5.5 Marking
6 Test for finished cables
6.1 Mechanical and physical properties of insulation and sheath
6.2 Electrical property
6.3 Overall dimension
6.4 Test for combustion performance of cable
7 Test method
7.1 Conductor resistance
7.2 Voltage test of finished cables
7.3 Voltage test of insulated cores
7.4 Test for insulation resistance at temperature above 90℃
7.5 Inspection for scuff resistance of colors and markings
7.6 Measurement of insulation thickness
7.7 Measurement of sheath thickness
7.8 Measurement of overall dimension and ovality
8 Delivery length
9 Acceptance rules
10 Marking and packaging
Table 1 Mechanical and physical properties of cross-linked polyolefin insulation (XPO)
Table 2 Mechanical and physical properties of cross-linked polyolefin sheath (SXE)
Table 3 Requirements for electrical property test of cross-linked polyolefin insulated cables
