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The power line is widely used in our daily life, especially in the temporary line and the household decoration indoor line. Recently, the fire
and electric shock accidents caused by the use of poor quality wires have occurred from time to time. How to identify the authenticity of the
power cord?
and electric shock accidents caused by the use of poor quality wires have occurred from time to time. How to identify the authenticity of the
power cord?
The insulation layer of wire is not made of high-quality insulating plastic, but made of recycled plastic. The insulating layer can be peeled off
with a light peeling, which is very easy to cause the insulation layer to be damaged by the current and cause leakage, which poses a great
threat to the safety of
the user's life and property.
with a light peeling, which is very easy to cause the insulation layer to be damaged by the current and cause leakage, which poses a great
threat to the safety of
the user's life and property.
The DC resistance of conductive core is unqualified. The thickness and quality of the wire conductor determine the current load of the wire.
If the core of the wire is made of inferior material and the actual cross section is far less than the specification indicated, if the conductor
resistance is too large for
long-term use, it will cause heat and cause electrical fire hazard.
If the core of the wire is made of inferior material and the actual cross section is far less than the specification indicated, if the conductor
resistance is too large for
long-term use, it will cause heat and cause electrical fire hazard.
According to the actual situation, this paper introduces the method of distinguishing power line
1. Look at the label. The contents of wire qualification certificate produced by regular manufacturers shall include: 3C certification mark,
certification number, model and specification, executive standard, rated voltage, wire length, production date, manufacturer, inspector,
factory name, address, fixed
telephone, anti-counterfeiting label, etc. The label of counterfeit products is often not printed clearly or printed content is not complete.
certification number, model and specification, executive standard, rated voltage, wire length, production date, manufacturer, inspector,
factory name, address, fixed
telephone, anti-counterfeiting label, etc. The label of counterfeit products is often not printed clearly or printed content is not complete.
2. Look at the surface. The plastic sheath of regular wires is soft and smooth, and the color is uniform. On its surface, it should also be printed with several items on the product certificate, such as 3C certification mark, certification number, model, rated voltage, executive standard, factory name, etc. At
the same time, the writing must be clear and not easy to erase.
the same time, the writing must be clear and not easy to erase.
3. Try bending. Take a wire head and bend it repeatedly by hand. If the handle is soft, the fatigue strength is good, the plastic or rubber handle is elastic and there is no crack on the wire insulator. The insulation layer of fake and inferior wires seems to be very thick. In fact, most of them are made of
recycled plastics. As long as you squeeze them slightly, the extruded parts will become white, and if you bend them for 4-6 times, you will have broken wires;
recycled plastics. As long as you squeeze them slightly, the extruded parts will become white, and if you bend them for 4-6 times, you will have broken wires;
4. Tear the insulation. High quality insulating materials have a certain mechanical strength and flexibility, easy to tear off. Can tear off a piece of wire by hand;
5. Look at the combustion. According to the regulations, the insulation layer of wire has certain flame retardancy. Strip off a section of insulation layer, ignite with a lighter, leaving the open fire can continue to spontaneous combustion is the poor quality line.
6. Check the thickness. Cut off a section of insulation layer to see whether there are visible pores on the cross section of the insulation layer, and whether the core is located in the middle of the insulation layer. Not in the middle is due to the process is not high and caused by the phenomenon of core,
there are pores that indicate the use of insulating material is not qualified. Serious eccentricity is the most easy to leakage in the thin side, there are pores also affect the withstand voltage strength.
there are pores that indicate the use of insulating material is not qualified. Serious eccentricity is the most easy to leakage in the thin side, there are pores also affect the withstand voltage strength.
7. Look at the copper wire. The color of high-quality copper wire is bright and reddish, while the inferior copper core wire is purple black, black, yellow or white, and its hardness is larger. For the multi stranded flexible wire, touch the top of the copper wire with the palm, and the feeling should be flat,
without tingling, and the handle is soft. Otherwise, it's poor quality wire.
without tingling, and the handle is soft. Otherwise, it's poor quality wire.
8. Weigh. High quality wires are generally within the specified weight range. For example, the commonly used plastic insulated single strand copper core wire with BV 2.5 mm2 is 3.0-3.2 kg according to the weight of 100 m. Poor quality wires are not heavy enough because of insufficient length or cross-section.
