GB 12972.10-1991 Mining rubber sheathed flexible cables Part 10: Miner's cap lamp wires

This standard specifies the product varieties, technical requirements, test methods and inspection rules for miner's cap lamp wires. This standard applies to mining copper core rubber insulated leather sheathed lamp wires. This standard should be used together with GB 12972.1. GB 12972.10-1991 Mining rubber sheathed flexible cables Part 10: Miner’s cap lamp wires GB12972.10-1991 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Miner's cap lamp cords and scope of application
This standard specifies the product varieties, technical requirements, test methods and inspection rules for miner's cap lamp wire products. This standard applies to mining copper core rubber insulated rubber sheathed cap lamp wires. This standard should be used together with GB12972.1.
2 Usage characteristics
2.1 The working voltage is DC 5V.
2.2 The long-term allowable operating temperature of wire conductors is +165°C. 3 model
3.1 cable model is shown in Table 1.
Table 1
Miner's Hat Lamp Wirebzxz.net
Miner's Hat Lamp Wire
The cable type is shown in Figure 1.
GB12972.10-91
instead of GB1170-74
for various acids and alkalis Miner's lamp. The sheath does not have combustion resistance and is used for various acid and alkaline miner's lamps. The sheath has combustion resistance 3
Figure 1
1—conductor; 2—insulation; 3—reinforced core; 4—sheath. Approved by the National Technical Supervision Bureau on 1991-06-06 and 1992-03- 01Implementation
4 Specifications
Cable specifications should comply with Table 2.
Number of cores
Number of roots/single wire nominal diameter
GB12972.10--91
Table 2||tt| |Insulation thickness
5.1 The technical requirements of cables should comply with Table 3. 5.2 Conductors
5.2.1. Single wires in conductors are allowed to be tinned. Nominal thickness of sheath
5.2.2 The stranded pitch diameter ratio of the cabled stranded conductors should not be greater than 30. 5.3 Insulation
Cable Outer diameter
UM, UM-1
minimum
maximum
5.3.1 The insulation uses natural rubber as the base material, and its performance should comply with the provisions of Appendix A of this standard. 5.3.2 The thickness of the thinnest point of the insulation should not be less than 90% of the specified thickness minus 0.2mm. 5.3.3 Before stranding, the insulated wire core should withstand the power frequency AC spark voltage test with a voltage of 2000V. 5.4 Cable core
5.4.1, the strengthening core is located in the center of the cable core, the cable core stranding pitch should not be greater than 13mm, and the stranding direction is right. 5.4.2 The tensile breaking force of the reinforced core should not be less than 196N. 5.4.3 The cable core is allowed to be covered with an isolation layer, which can be paper tape or tape of suitable material. 5.5 Sheath
Conductor resistance at 20℃
2/m maximum value
5.5.1UM type The wire rubber sheath should comply with the XH-00A regulations in GB7594.4, and the UM-1 wire rubber sheath should comply with the XH-01A regulations in GB7594.5.
Test and inspection rules
Products are tested according to Table 3.
Table 3
Serial number
Project name
Structural dimensions
Conductor
Insulation thickness
Cable core
Sheath thickness
Wire outer diameter
Technical requirements
Article 5.2 and Table 2 of this standard
Article 5.3.2 of this standard
Article 5.4 of this standard
Article 8 of GB12972.1 and Table of this standard 2
Table 2 of this standard
Test type
T,s| |tt||T,s
Test method
Hanging visual inspection
GB2951.3||tt ||GB2951.4
Serial number
2.5||tt ||2.6
Project name
Wire performance
Conductor resistance
Power frequency AC
Voltage Test
Burning test
Insulation physical machinery
Performance
Sheath physical machinery
Performance
Reinforced core tensile test||tt| |Identification mark
Delivery length
Table 2 of this standard
GB 12972.10-- 91
Continuation of Table 3
Technical requirements
Test length is 10 m
Immersion time 1h
Water temperature 20±5℃
Voltage/time 500V/5min
GB12972.1 Article 11.6
Article 5.3.1 of this standard
Article 5.5.1 of this standard
Article 5.4.2 of this standard
GB12972.1 Article 10
GB12972.1 Article 11.12
Note: ①$ means regular testing, which should be conducted at least once a year. ②Item 2.3 does not apply to UM type wires.
Test type
T,st||tt ||T,St
Test method
GB12666.2
GB2951
GB2951
GB6995
meter counter
serial number
1||tt| |1.1
Sample before aging||tt ||Tensile strength
Elongation at break
Air box thermal aging test
Test temperature
Test time
Tensile strength||tt| |Change rate of tensile strength
Elongation at break
Change rate of elongation at break
Additional notes:
GB12972.1091
Appendix A| |tt||Rubber insulation performance requirements
(supplement)
Table A1
Test items
Minimum value
Minimum value
Minimum value
Maximum value
Maximum value
Minimum value
This standard is proposed by the Ministry of Mechanical and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Shanghai Cable Research Institute of the Ministry of Mechanical and Electronic Industry. MPa
4.5| |tt||200
Indicator
10×24
200||tt| | ±40 |
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