1.1 Scope
This part of GB/T 5023 applies to rigid and flexible cables with insulation, and sheath if any, based on polyvinyl chloride, of rated voltages U0/U up to and including 450/750 V used in power installations of nominal voltage not exceeding 450/750 V a.c.
Note: For some types of flexible cables the term cord is used.
The particular types of cables are specified in GB/T 5023.3, GB/T 5023.4, etc. The code designations of these types of cables are given in Appendix A.
The test methods specified in Parts 1, 3, 4, etc. are given in GB/T 5023.2, GB/T 18380.12-2008 and in the relevant parts of GB/T 2951-2008.
1.2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 5023. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. 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 2951.11-2008 Common Test Methods for Insulating and Sheathing Materials of Electric and Optical Cables — Part 11: Methods for General Application — Measurement of Thickness and Overall Dimensions — Tests for Determining the Mechanical Properties (IEC 60811-1-1:2001, IDT)
GB/T 2951.12-2008 Common Test Methods for Insulating and Sheathing Materials of Electric and Optical Cables — Part 12: Methods for General Application — Thermal Ageing Methods (IEC 60811-1-2:1985, IDT)
GB/T 2951.14-2008 Common Test Methods for Insulating and Sheathing Materials of Electric and Optical Cables — Part 14: Methods for General Application — Test at Low Temperature (IEC 60811-1-4:1985, IDT)
GB/T 2951.21-2008 Common Test Methods for Insulating and Sheathing Materials of Electric and Optical Cables — Part 21: Methods Specific to Elastomeric Compounds — Ozone Resistance, Hot Set and Mineral Oil Immersion Tests (IEC 60811-2-1:2001, IDT)
GB/T 2951.31-2008 Common Test Methods for Insulating and Sheathing Materials of Electric and Optical Cables — Part 31: Methods Specific to PVC Compounds — Pressure Test at High Temperature — Test for Resistance to Cracking(IEC 60811-3-1:1985, IDT)
GB/T 2951.32-2008 Common Test Methods for Insulating and Sheathing Materials of Electric and Optical Cables — Part 32: Methods Specific to PVC Compounds — Loss of Mass Test — Thermal Stability Test (IEC 60811-3-2:1985, IDT)
GB/T 3956-1997 Conductors of Insulated Cables (idt IEC 60228:1978)
GB/T 5023.2-2008 Polyvinyl Chloride Insulated Cables of Rated Voltages Up to and Including 450/750V — Part 2: Test Methods (IEC 60227-2:2003, IDT)
GB/T 5023.3-2008 Polyvinyl Chloride Insulated Cables of Rated Voltages Up to and Including 450/750V — Part 3: Non-sheathed Cables for Fixed Wiring (IEC 60227-3:1997, IDT)
GB/T 5023.4-2008 Polyvinyl Chloride Insulated Cables of Rated Voltages Up to and Including 450/750V — Part 4: Sheathed Cables for Fixed Wiring (IEC 60227-4:1997, IDT)
GB/T 5023.5-2008 Polyvinyl Chloride Insulated Cables of Rated Voltages Up to and Including 450/750V — Part 5: Flexible Cables (Cords) (IEC 60227-5:2003, IDT)
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 (IEC 60332-1-2:2004, IDT)
IEC 173:1964 Colours of the Cores of Flexible Cables and Cords
IEC 62440 Electric Cables — Guide to Use for Cables with a Rated Voltage Not Exceeding 450/750V1
2 Definitions
For the purpose of this part of GB/T 5023, the following definitions shall apply.
2.1 Definitions relating to insulating and sheathing materials
2.1.1
Polyvinyl chloride compound (PVC)
Combination of materials suitably selected, proportioned and treated, of which the characteristic constituent is the plastomer polyvinyl chloride or one of its copolymers. The same term also designates compounds containing both polyvinyl chloride and certain of its polymers.
