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How to choose home installation wires？
Nov.20.2024
1、 Should the cross-sectional area of all wires be selected as 2.5mm2 or 1.5mm2?
Answer: Nowadays, buildings are generally divided into three power distribution lines. 1. The main line of the kitchen and bathroom should not be less than 6 square millimeters, and the branch lines should be trained according to their capacity; 2. The main line of the guest bedroom shall not be less than 4 square millimeters, and the branch socket shall not be less than 2.5 square millimeters; 3. The main lighting line shall not be less than 2.5 square millimeters, and the lamp control line shall be 1.5 square millimeters. "
2、 Should we choose national standard wires? How should national standard wires be identified? Can't single stranded wires be used instead of twisted wires?
Answer: According to national standards, the surface of wires should have continuous markings indicating the manufacturer's name, product model, and rated voltage. This is beneficial for timely finding the manufacturer when problems occur during the use of wires, and consumers must pay attention to this when choosing wires.
At the same time, consumers should pay attention to whether the manufacturer name, product model, rated voltage indicated on the certificate of conformity are consistent with the printed markings on the surface of the wire when purchasing wires, to prevent counterfeit products. National standard lines should be selected; All wires must use a single plastic copper wire, and it is absolutely not allowed to use multiple strands of soft copper wire;
3、 Can't there be any knots in the middle of the wire?
Answer: It is impossible for there to be no joints in the middle of the circuit. There will definitely be joints, and the length of the joints is 5-7 times the diameter of the wire, which means that the joints should be wrapped at least 5-7 times and tinned.
4、 How to identify counterfeit and inferior wires?
(1) To see if there is a quality system certification certificate; Check if the certificate of conformity is standardized; Check for the factory name, address, inspection stamp, and production date; Check if there are any trademarks, specifications, voltage, etc. printed on the wires. We also need to look at the cross-section of the copper core of the wire, the color of the high-quality purple copper
Bright and soft in color, otherwise it is a defective product. Consumers should pay attention to the smooth and flat appearance of the wires when choosing them, with no damage to the insulation and sheath layers, clear logo printing, and no greasy feeling when touching the wires. From the cross-section of the wire, the thickness of the insulation or sheath on the entire circumference of the wire should be uniform and should not deviate from the core. The insulation or sheath should have a certain thickness.
(2) We need to try. A wire head can be repeatedly bent by hand, and any product that feels soft, has good fatigue resistance, has a strong plastic or rubber feel, and has no cracks on the wire insulation is considered superior.
(3) Weigh it. High quality wires are generally within the specified weight range. The commonly used plastic insulated single stranded copper core wire with a cross-sectional area of 1.5 mm2 weighs 1.8-1.9 kg per 100 m; 2.5 mm2 plastic insulated single stranded copper core wire, weighing every 100 meters
The quantity is 3-3.1 kg; 4.0 mm2 plastic insulated single stranded copper core wire, with a weight of 4.4-4.6 kg per 100 m. Poor quality wires have insufficient weight, either insufficient length, or excessive impurities in the copper core of the wire.
(4) Look at the copper material. A qualified copper core wire should have a purple red color, luster, and a soft touch. Fake and inferior copper core wires have copper cores that are purple black, yellowish, or whitish, with many impurities, poor mechanical strength, and poor toughness. They can break with a little force, and there are often broken wires inside the wires
Phenomenon. When checking, you just need to peel off one end of the wire by 2 cm, and then rub a piece of white paper slightly on the copper core. If there is black substance on the white paper, it indicates that there are more impurities in the copper core. In addition, the insulation layer of fake and inferior wires may seem thick, but in reality, most of them
It is made of recycled plastic, and over time, the insulation layer will age and leak electricity.
(5) Look at the price. Due to the low production cost of counterfeit and inferior wires, vendors often sell them at low prices under the guise of being cheap and high-quality, which can deceive people.