This part specifies the models, specifications, technical requirements and inspection of cross-linked polyolefin insulated cables with rated voltages up to and including 450/750V and with maximum conductor temperature of 105℃ in normal operation.
This part is applicable to copper conductors and cross-linked polyolefin insulated cables (with rated voltages up to and including 450/750V and with maximum conductor temperature of 105℃ in normal operation) used for fixed wiring and power and electronic equipment internal connection.
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 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 17650.2-1998, 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: Test on bunched wires or cables (GB/T 18380.3-2001, idt IEC 60332-3: 1992)
JB/T 10491.1-2004 Cross-linked polyolefin insulated wires and cables with rated voltages up to and including 450/750V - Part 1: General requirements
3 Service characteristics
The rated voltage of cables, U0/U, shall be 450/750V and 300/500V.
The long-term permissible working temperature of cables shall not be higher than 105℃.
4 Models
See Table 1 for models of cables.
JB/T 10491.2-2004 The following standards are cited：
