How to choose wires when selecting materials for d

2022-07-22
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When decorating, wires must be selected reasonably and correctly. If they are not selected properly, there will be potential safety hazards and fire will be caused in serious cases

wires must be reasonably and correctly selected during decoration. If they are not selected properly, there will be potential safety hazards, and fire will be caused in serious cases. Therefore, the following aspects should be selected:

panda wire

1 Manufacturer's choice

wires and cables are subject to national compulsory certification “ CCC” Products, so we should choose products with this logo, and also pay attention to the product name, factory name, trademark, specification and model on the wire; For example, a complete logo should include: “ 3C mark: CCC; Product Name: PVC insulated wire; Manufacturer: Xinjiang cable factory of TBEA Co., Ltd; Trademark: Xinte; Voltage level: 450/750v; Executive standard number and specification: 227IEC01 (BV) 2.5&rdquo

2. Selection of wire color

according to the provisions of the building code, the power supply is three-phase five wire system, “ A、B、C” Three phase wires are: “ Yellow, green, red ”, The zero line is “ Blue ”, The grounding wire is “ Yellow/green &rdquo

3. Selection of current carrying capacity

calculated according to the power load, the current carrying capacity of 1.5mm2 ~ 10mm2 copper core wire with fixed wiring is 5 times of the sectional area, and the current carrying capacity of 16mm2 ~ 25mm2 copper core wire is 4 times of the sectional area; In other words, 1.5mm2 copper core wire can withstand 7.5A safety current; 4mm2 copper core wire can withstand 20A safety current in the threading tube; 10mm2 copper core wire can withstand 50A safety current in the threading tube; 16mm2 copper core wire can withstand 84A safety current in the threading tube; 25mm2 copper core wire can withstand 100A safety current in the threading tube

therefore, BV or bvr1.5 mm2 copper core wire is selected for lighting wire, BV or bvr2.5 mm2 copper core wire is selected for socket wire, BV or bvr4mm2 copper core wire is selected for air conditioning wire, and BVR 2.5mm2 copper core wire is selected for Yuba wire. If conditions permit, BVR 4mm2 copper core wire is the best

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