home > News > Company News

What is the national standard power cord?

source:Company News     Popular:adapter     release time:2021-06-03 10:45:11     Article author:sznbone    

  People in the wire and cable industry know more or less that there are national standard lines and non-standard lines in the wire and cable industry. However, many people do not know what the national standard power cord standard is. As a result, the purchase of non-national standard cables may eventually lead to fire disasters. Non-standard cables are not only a problem in the wire and cable industry, but are closely related to people’s lives and property. Fighting against and resisting non-standard lines is the obligation of each of us.

What is the national standard power cord?(图1)

  1. National standard wire and cable:

  It is the wire produced in full accordance with the national standard. General household and common wires have standard specifications and performance, and the national standard specifies 5 common specifications and performance.

  2. Main measurement standards:

  1. Appearance standard, there must be certification mark, manufacturer, wire diameter, etc. on the wire, and the ground wire uses a yellow-green insulation layer

  2. Mechanical strength

  3. Insulation (generally greater than 100MΩ) and compressive strength (1500V below 500V) of the sheath

  4. Wire resistance (no more than a certain resistance under a certain wire diameter, conductivity, and length)

  5. Under the high temperature impact of 150 degrees, the wires must not be cracked under the low temperature of -30 degrees.

  3. The distinction between national standard and non-national standard:

  The national standard line premium product is 100±0.5 meters/roll, some of the non-marked lines are only over 80-95 meters/roll, generally 95 meters are mostly, the 95 line refers to this kind of 95 meters but marked with 100 meters of non-marking lines.

  1 It depends on whether there is a quality system certification; whether the certificate is standardized; whether there is a factory name, site, inspection stamp, and production date; whether there are trademarks, specifications, voltages, etc. printed on the wires. It also depends on the cross-section of the copper core of the wire. The high-quality copper is bright in color and soft in color, otherwise it is inferior.

  2 to try. It is recommended to bend a wire head repeatedly by hand. Anything with soft hand feel, good fatigue resistance, plastic or rubber hand feel elastic and no cracks on the wire insulator is the best product.

  3 Weigh the weight. Good quality wires are generally within the specified weight range. For example, the commonly used plastic insulated single-strand copper core wire with a cross-sectional area of 1.5 mm2 has a weight of 1.8 ~ 1.9 kg per 100 m; a 2.5 mm2 plastic insulated single-strand copper core wire has a weight of 3 ~ 3.1 kg per 100 m; 4.0 mm2 The plastic insulated single-strand copper core wire weighs 4.4 to 4.6 kg per 100 m. Poor quality wires have insufficient weight, either the length is insufficient, or the copper core of the wire is too impurity.

  4 Look at the copper. The copper core of the qualified copper core wire should be purple-red, shiny, and soft to the touch. The fake and inferior copper core wires are purple-black, yellowish or white, with many impurities, poor mechanical strength, poor toughness, and will break with a little force, and there are often broken wires in the wires. When checking, you only need to peel off the wire 2 cm at one end, and then rub it on the copper core with a piece of white paper. If there is black substance on the white paper, it means that there are more impurities in the copper core. In addition, the insulating layer of fake wires seems to be very thick, but in fact, most of them are made of recycled plastics. Over time, the insulating layer will age and cause leakage.

  5 Look at the price. Due to the low production cost of counterfeit and shoddy wires, vendors often sell them at low prices under the guise of low prices and good quality when selling.


Read recommendations:

12V2ASwitching Power Supply

24W USB Charger,24W Charger,USB Charger

EI-66 ADAPTER LINEAR ADAPTOR SWITCHING ADAPTOR Linear Power Adapter Linear Adapter

Power cord voltage of plugs in various countries

What are the main application areas of waterproof transformers and waterproof transformers?

Popular recommended products

12W POWER SUPPLY,12W CAR POWER SUPPLY,POWER SUPPLY,CAR POWER SUPPLY

2020-08-27

12VDC8A 96W power supply

2020-08-28

18-25W Switching Power Supply

2020-08-28

EI Power Transformer Power Transformer

2020-08-27

19V2A 36W Switching Power Supply

2020-08-28

45W PD Charger,45W Charger,PD Charger

2020-08-27

3-12W Medical Switching Power Supply 3W Switching Power Supply 12W Power Supply

2020-08-27

12W 2USB Charger,2USB Charger,12W Charger,USB Charger

2020-08-27

Transformer,Power Transformer,Ring Power Transformer

2020-08-27

40W 4USB Charger,40W Charger,4USB Charger

2020-08-27

12-24W Medical Switching Power Supply

2020-08-27

MKS-1201250HEU Switching Power Supply

2020-08-29

MKD-571202000 ADAPTER AC ADAPTER CE ADAPTOR UL ADAPTOR Linear Adapter

2020-08-28

60W 6USB Charger,60W Charger,6USB Charger,Charger

2020-08-27

MKS-120200BS-36 Switching Power Supply

2020-08-29

30W PD Charger,30W Charger,PD Charger

2020-08-27

3-8W Charger,3W Charger,8W Charger,4W Charger,5W Charger,6W Charger,7W Charger

2020-08-27

Transformer,High Frequency Transformer,Frequency Transformer

2020-08-27

36-65W Switching Power Supply

2020-08-29

72-200W Switching Power Supply

2020-08-29

MKS-120200EU-36 Switching Power Supply

2020-08-29

24V1.5A 36W Switching Power Supply

2020-08-29

10-24W Charger,24W Charger,10W Charger

2020-08-27

EI-35 ADAPTER AC ADAPTER SWITCHING ADAPTOR Linear Power Adapter Linear Adapter

2020-08-28

MKS-1203000EX Switching Power Supply

2020-08-29

24-65W Medical Switching Power Supply

2020-08-27

24-65W Switching Power Supply

2020-08-29

3-15W Switching Power Supply

2020-08-28

36-90W Charger,36W Charger,90W Charger,40W Charger,50W Charger

2020-08-27

200-500W Switching Power Supply

2020-08-29
Copyright 2020 © Merryking Technology Co., Ltd. All rights reserved