At present, the Mineral-insulated copper-clad cable used in the domestic market are roughly as follows
1、 BTTZ copper core copper sheathed magnesium oxide insulated fireproof cable
It is a rigid cable with a seamless copper tube sheath on the outer layer and magnesium oxide crystal powder filled in the middle as insulation material. The conductor is a single stranded copper rod (with poor bending performance). BTTZ is a rigid Mineral-insulated copper-clad cable with limited production length. In actual use, it must be spliced by several or even dozens of short cables with many connectors.
2、 YTTW copper core copper interlocking armored mineral cable
Composed of copper stranded wire, mineral compound insulation, and specially made non combustible copper interlocking armor sheath.
3、 BTLY aluminum sheathed continuous extruded Mineral-insulated copper-clad cable
However, the market is also flooded with a large number of low-quality products. The editor in the above picture recently discovered a suspected counterfeit YTTW mineral cable at a certain construction site. The product's certificate and cable body are clearly printed with the word YTTW, but in terms of appearance, structure, cross-section, and material, it is different from familiar YTTW mineral cables. The quality of mineral cables varies. As consumers, how should we distinguish the fire resistance performance of mineral cables? In the absence of a professional combustion laboratory, consumers learned from the relevant professional Electrical engineer that the most basic thing to see is whether there is a BS6387 standard test report for mineral cables issued by a third-party authority, (C.W.Z) Specification for Performance Requirements of Cables to Keep Circuit Intact in Case of Fire:
⑴: Continuous power on for 180 minutes without breakdown under a flame at 950 ° C (item C is purely fire-resistant);
⑵: After 15 minutes under a flame at 650 ° C, withstand 15 minutes of water spray without breakdown (W spray test);
⑶: withstand 15 minutes of knocking vibration without breakdown under a flame at 950 ° C (Z-item impact test).
Secondly, it depends on whether the manufacturer has their own core technology and patents, and whether they have their own combustion performance testing laboratory to comprehensively consider. So it seems that choosing a well-known large brand cable manufacturer is particularly important, and it is relatively simple to obtain high-quality mineral cable products. Oubo Electric specializes in producing mineral cables, providing you with the most reliable quality assurance.