How to choose wires when decorating materials

2022-11-11 10:05:34

When decorating, we must choose the wires reasonably and correctly. If we choose improperly, there will be potential safety hazards, and if it is serious, it will cause fire. Therefore, the following aspects should be selected:

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1. The manufacturer's choice

Wires and cables belong to the "CCC" product that is subject to national compulsory certification. Therefore, products with this mark must be selected. Also pay attention to product names, factory names, trademarks, specifications, etc. on the wires; for example, a complete mark should include: " 3C mark: CCC; Product name: PVC insulated wire; Manufacturer: Tebian Electric Co., Ltd. Xinjiang Cable Factory; Trademark: Xinte; Voltage Rating: 450/750V; Execution Standard Number and Specification Model: 227IEC01 ( BV) 2.5".

2. The choice of wire color

According to the provisions of the building code, the power supply is a three-phase five-wire system. The three-phase lines “A, B, and C” are “yellow, green, and red”, the neutral line is “blue,” and the ground line is “yellow/green. Double color."

3. The choice of current carrying capacity

Calculated according to the electrical load, the fixed-wiring copper core wire of 1.5mm2 to 10mm2 has an ampacity 5 times that of the cross-sectional area, and the copper core wire carrying capacity of 16mm2 to 25mm2 is 4 times the cross-sectional area; that is, 1.5mm2. The copper wire can withstand a safe current of 7.5A; the 4mm2 copper wire can withstand a safe current of 20A in the threading tube; the 10mm2 copper wire can withstand a safe current of 50A in the threading tube; the 16mm2 copper wire can be in the threading tube. It withstands a safe current of 84A; a 25mm2 copper wire can withstand 100A of safe current in the conduit.

Therefore, the lighting line selects BV or BVR 1.5 mm2 copper wire, the socket wire uses BV or BVR 2.5 mm2 copper wire, the air conditioning wire uses BV or BVR4 mm2 copper wire, the Yuba wire uses BVR 2.5mm2 copper The core wire, if available, is the best choice for BVR 4mm2 copper wire.

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