GB/T 9330-2020Plastic insulated control cables (English PDF)

3.1 Routine tests; R

Tests carried out by the manufacturer on all manufactured lengths of finished cable to verify that all cables conform to specified requirements.

3.3 Type tests; T

Tests carried out on a type of cable specified in this standard before it is supplied, on a commercial basis, to demonstrate that the cable has satisfactory performance under the conditions of intended use.

3.4 Rated voltage

Reference voltage for cable structure design and electrical performance testing.

4.1 Product codes

See Table 1 for product codes.

4.2 Product representation methods

4.2.1 Products are indicated by model, specification and standard number.

4.2.4 The green/yellow combination insulated cores in the cable shall be indicated separately from other cores.

Example 1: Copper core PVC insulated PVC sheathed control cable, with rated voltage 450/750 V, 24 cores, 1.5 mm² (type 1 conductor structure), green/yellow combination color insulation core, is expressed as.

6.1 Finished cable marking

6.1.1 Marking content

Finished cables shall have continuous markings of the manufacturer's name, cable model, specification and rated voltage. The manufacturer's name marking can be the manufacturer's name or a registered trademark. All marks shall be legible.

6.1.4 Abrasion resistance

Ink printed marks shall be abrasion resistant. The marks shall remain basically unchanged after being wiped.

6.2 Identification of cable insulation cores

6.2.1 General requirements

6.2.2 Color identification of cable insulation cores

When the cable insulation core is identified by colored insulation, the preferred color spectrum for cables with five cores or less is.

6.2.3 Digital identification of cable insulation cores

6.2.3.1 General requirements

When cable insulation cores are identified by numbers, the insulation shall be of the same color and arranged in numerical sequence, except for green/yellow combination insulation cores (if any).

6.2.3.2 Arrangement of marks

The digital identification marks shall be repeated at equal intervals along the insulated wire core. Two adjacent sets of digital marks shall be reversed.

7.1 Conductor

7.1.1 Conductor material

The conductor material shall be annealed copper wire. The single wire in the conductor can be untinned or tinned.

7.2 Insulation

7.2.1 Insulation materials

The insulation material shall be one of the various insulation mixtures listed in Table 4.

The maximum conductor temperature of cables with different types of insulation mixtures is shown in Table 4. The mechanical and physical property requirements and test methods of insulation are shown in Table 5.

7.2.2 Insulation structure

The insulation shall be tightly extruded onto the conductor and shall be easily strippable without damaging the insulation, the conductor or the tin coating (if any). The nominal thickness of insulation is shown in Table 6.

7.3 Cabling and fillers

7.3.1 Laying direction and laying pitch

The insulated wire cores shall be twisted into cables, and the twisting direction of the outermost layer shall be right-handed.

7.3.2 Wire arrangement

The green/yellow combination insulated core (if any) shall be placed on the outermost layer of the cable core.

7.4 Metal shielding

7.4.1 General provisions

Shielded cables shall have a metal shielding layer outside the cable core. Metal shielding includes metal (composite) tape wrapped shielding and metal wire braided shielding.

7.4.3 Metal braided shield

The metal wire braided shield shall be made of soft round copper wire or tinned round copper wire of the same nominal diameter. The braiding density shall not be less than 80%.

7.5 Inner lining (isolation sleeve)

7.5.1 Inner lining (isolation sleeve) structure

Armored cables shall have an inner lining layer (shielded armored cables have an isolation sleeve, which is collectively referred to as the inner lining layer unless […]

7.5.2 Lining material

The lining material shall be non-hygroscopic and suitable for the operating temperature of the cable and compatible with the cable insulation material.

7.6 Metal armor

7.6.1 Armor material

Armored steel strips shall be galvanized steel strips. Armored steel wires shall be round galvanized steel wires.

7.9 Cable outer diameter

The upper limit of the outer diameter of the finished cable is calculated according to Annex A. The average outer diameter of the finished cable shall not be greater than the upper limit.

8.1 Inspection of structural dimensions of finished cables

The structural dimensions of the finished cable shall comply with the provisions of Chapter 7. The structural dimensions of the cable shall be checked by measuring tools or manually.

8.3 Voltage tests

8.4 Insulation resistance measurement

The insulation resistance at the highest conductor temperature during normal operation of the finished cable shall comply with the requirements of Table 17.

8.5 Mechanical and physical properties test of insulation and sheath

The mechanical and physical properties of finished cable insulation shall comply with the requirements of Table 15.

8.6 Cable combustion performance test

The flame retardant performance of a single strand of PVC sheathed cable, single strand flame retardant polyethylene sheathed cable, and single strand halogen-free low-smoke flame retardant cable shall comply with the requirements of GB/T 19666.

8.7 Identification inspection for finished cable marks and cable insulation cores

Finished cable marks shall comply with the requirements of 6.1.