Non-standard wire refers to a specific purpose cable and wire that does not fall under the specifications of the national standard. However, he should also meet general requirements in terms of safety and quality performance. The national standard wire is a wire that is produced exactly in accordance with the national standard. General home, common wire is the standard specification performance, the national standard wire. For example, the national standard stipulates the common seven kinds of specifications and performances, and also stipulates the general requirements, but special manufacturers need seven kinds of exceptions, that is, non-standard.
Wires belong to 3C products, which enforce mandatory standards.
Similar to non-standard parts.
At present, the most common cable national standard is GB5023.1, GB5023.2, GB5023.3, GB5023.4 series of standards, namely "rated voltage 450/750V and the following PVC insulated cables" series standards. And JB8734 "voltage rated at 450/750V and below PVC insulated cable wires and cords" series of standards.
Moreover:
GB9330GB/T12706 series, high pressure is mainly GB12527, GB14049.
At present, the variety of electric wires on the market is chaotic, the specifications are numerous, and the prices are uneven. The selection is very difficult. The same specification of a roll of wire, because of different manufacturers, the price can be a difference of 10% -20%. As for the quality, whether the length is up to standard, it is even more difficult to determine.
The huge difference in the price of wires is due to the different raw materials used in the production process. The main raw materials for producing wires are electrolytic copper, insulating materials and sheathing materials. The raw materials of the inferior wires are recycled copper and defective insulating materials, so the price is very low.
At the time of purchase:
1, see if there is a quality system certification.
2, see whether the certificate is standardized.
3, see if there is a factory name, site, inspection chapter, production date.
4, see if there are printed on the wire, trademarks, specifications, voltage and so on.
5, look at the cross section of the wire copper core, excellent product copper color bright, soft color, otherwise it is defective.
6ã€Whether the wire is "thick and thick"
7. Test: It is advisable to take a wire head and repeatedly bend it by hand. The soft touch and fatigue resistance are good. The plastic or rubber feel is elastic and the wire insulation is free of cracks, and vice versa.
Wires belong to 3C products, which enforce mandatory standards.
Similar to non-standard parts.
At present, the most common cable national standard is GB5023.1, GB5023.2, GB5023.3, GB5023.4 series of standards, namely "rated voltage 450/750V and the following PVC insulated cables" series standards. And JB8734 "voltage rated at 450/750V and below PVC insulated cable wires and cords" series of standards.
Moreover:
GB9330GB/T12706 series, high pressure is mainly GB12527, GB14049.
At present, the variety of electric wires on the market is chaotic, the specifications are numerous, and the prices are uneven. The selection is very difficult. The same specification of a roll of wire, because of different manufacturers, the price can be a difference of 10% -20%. As for the quality, whether the length is up to standard, it is even more difficult to determine.
The huge difference in the price of wires is due to the different raw materials used in the production process. The main raw materials for producing wires are electrolytic copper, insulating materials and sheathing materials. The raw materials of the inferior wires are recycled copper and defective insulating materials, so the price is very low.
At the time of purchase:
1, see if there is a quality system certification.
2, see whether the certificate is standardized.
3, see if there is a factory name, site, inspection chapter, production date.
4, see if there are printed on the wire, trademarks, specifications, voltage and so on.
5, look at the cross section of the wire copper core, excellent product copper color bright, soft color, otherwise it is defective.
6ã€Whether the wire is "thick and thick"
7. Test: It is advisable to take a wire head and repeatedly bend it by hand. The soft touch and fatigue resistance are good. The plastic or rubber feel is elastic and the wire insulation is free of cracks, and vice versa.
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