GB/T 25085.5-2026Road vehicles - Automotive cables - Part 5: Dimensions and requirements for 600 V a. c. or 900 V d. c. and 1 000 V a. c. or 1 500 V d. c. single core copper conductor cables (English PDF)

4.1 General test conditions

The test conditions of GB/T 25085.2-2024 shall be applied.

Cables shall be tested according to the provisions of Table 2.

If the supplier and purchaser agree to modify or change the test methods and requirements, all changes and modifications shall be clearly recorded.

4.2 Safety precautions

The precautions described in the “WARNING” at the beginning of this Document shall be followed.

4.3 Voltage range

The upper limit of rated voltage of the cables described in this Document is as follows.

--- Maximum 600 V A.C. or 900 V D.C.;

--- Maximum 1000 V A.C. or 1500 V D.C.

Conductor specification of 0.35 mm² shall not be applied to 1000 V A.C. or 1500 V D.C cable.

NOTE. Appendix B contains cable color identification information for determining the rated voltage values in this Document.

4.4 Temperature grade

All temperature grades in GB/T 25085.1-2024 apply to copper conductor cables.

4.5 Conductor material

The conductor shall be stranded from bare copper or copper-plated wire as shown in Table 1.

Conductors with a specification greater than or equal to 0.5 mm² shall consist of annealed soft copper wire or annealed compressed copper wire.

Conductors with a specification less than 0.5 mm² shall consist of annealed soft copper wire, annealed soft compressed copper wire, non-annealed hard copper wire, or copper alloy wire.

Specific requirements for the conductor shall conform to the provisions for the used materials.

Elongation requirements shall be determined through negotiation between the supplier and the purchaser.

For all conductors except alloy conductors, the resistance and cross-sectional area (CSA) of the finished cable shall conform to the provisions of Table 10.When alloy conductors are used, the resistance requirements shall be determined through negotiation between the supplier and the purchaser.

NOTE. See Appendix A for examples of stranded wires.

Table 1 -- Conductor description

4.6 Conductors

The conductors of finished cables shall conform to the provisions for cross-sectional area (CSA) and resistance in Table 10.

The maximum diameter of the conductor shall conform to the provisions of Table 11.

The stranding structure of the conductor is not a normative requirement.

NOTE 1.Existing stranding structures for copper conductors are shown in Table A.1.

NOTE 2.Recommended stranding structures for copper conductors are shown in Table A.2.

Other stranding structures that meet the above requirements and are determined through negotiation between the supplier and the purchaser may be used for copper conductors.

4.7 Insulation thickness

This Document specifies the following two different insulation thicknesses.

--- Thick-wall insulation;

--- Thin-wall insulation.

The minimum wall thickness for different conductor specifications shall conform to the provisions of Table 11.

The nominal wall thickness is calculated from the minimum wall thickness in Table 11 using the following Formula.

Where.

Wmin – minimum wall thickness, in mm;

Wnom – nominal wall thickness, in mm.

4.8 Outer diameter of cable

The outer diameter of the cable for each conductor specification and insulation thickness shall conform to the provisions of Table 11.

4.9 Representative conductor specification for testing

When a test is required, all combinations of conductor specifications, insulation thickness, and insulation materials shall conform to the relevant provisions.

or

......