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Five methods for identifying whether wires and cables comply with national standards
In daily life,we rarely involve knowledge about wires and cables,so when we choose wires and cables,we may fall into a misconception,which poses a threat to our lives and property.Let's explore together how to choose wires and cables that meet national standards.
1.Weigh.Good 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 1.5mm2 weighs 1.8-1.9kg per 100m;2.5mm2 plastic insulated single stranded copper core wire,with a weight of 3-3.1kg per 100m;4.0mm2 plastic insulated single stranded copper core wire,with a weight of 4.4-4.6kg per 100m.Poor quality wires have insufficient weight,either insufficient length,or excessive impurities in the copper core of the wires.
2.To see.Check for quality system certification;Check if the certificate of conformity is standardized;Check for the factory name,address,inspection seal,and production date;Check if there are trademarks,specifications,voltage,etc.printed on the wires.We also need to look at the cross-section of the copper core of the wire.High quality purple copper has a bright and soft color,otherwise it is considered defective.
3.Look at the copper quality.Qualified copper wire cores should be purple red,glossy,and have a soft touch.However,fake and inferior copper core wires have purple black,yellow or white cores,high impurities,poor mechanical strength,and poor toughness.They can easily break with a little force,and there are often wire breakage phenomena inside the wires.When checking,you just need to peel off one end of the wire by 2cm,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 many impurities in the copper core.
4.We need to try.A wire head can be repeatedly bent by hand.Any wire that feels soft,has good fatigue resistance,plastic or rubber has a high elasticity to the touch,and there are no cracks on the insulation of the wire is considered an excellent product.
5.Compare prices.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 of good quality,which can deceive people.
1.Weigh.Good 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 1.5mm2 weighs 1.8-1.9kg per 100m;2.5mm2 plastic insulated single stranded copper core wire,with a weight of 3-3.1kg per 100m;4.0mm2 plastic insulated single stranded copper core wire,with a weight of 4.4-4.6kg per 100m.Poor quality wires have insufficient weight,either insufficient length,or excessive impurities in the copper core of the wires.
2.To see.Check for quality system certification;Check if the certificate of conformity is standardized;Check for the factory name,address,inspection seal,and production date;Check if there are trademarks,specifications,voltage,etc.printed on the wires.We also need to look at the cross-section of the copper core of the wire.High quality purple copper has a bright and soft color,otherwise it is considered defective.
3.Look at the copper quality.Qualified copper wire cores should be purple red,glossy,and have a soft touch.However,fake and inferior copper core wires have purple black,yellow or white cores,high impurities,poor mechanical strength,and poor toughness.They can easily break with a little force,and there are often wire breakage phenomena inside the wires.When checking,you just need to peel off one end of the wire by 2cm,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 many impurities in the copper core.
4.We need to try.A wire head can be repeatedly bent by hand.Any wire that feels soft,has good fatigue resistance,plastic or rubber has a high elasticity to the touch,and there are no cracks on the insulation of the wire is considered an excellent product.
5.Compare prices.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 of good quality,which can deceive people.