source:Industry News Popular:adapter release time:2021-05-20 10:35:16 Article author:sznbone
Electrical appliances are used in daily work and production, and electrical appliances are inseparable from the plug power cord, but this is not very eye-catching, like the power cord that is common every day like the old king next door, in fact, there is a lot of knowledge in it. Well, it directly involves personal safety and home safety. So now we have a rough discussion, through the printing of the power cord to understand the characteristics of this power cord.
1. The printing on the American power cord is as follows: E229233 (UL) SJT 3x1.31mm2 (16AWG) 105C 300V VW-1 JUNJIAN.
It means: E229233 (UL) is the UL certification number, SJT series PVC insulated PVC sheathed flexible cord, 3-core conductor cross-sectional area 1.31 square 16 gauge wire, temperature resistance below 105 degrees, rated voltage 300V, VW-1 vertical burning For the test, JUNJIAN is the manufacturer Junjian Technology.
Of course, there are many series of American power cords, such as SPT, NISPT, SVT, ST and so on.
2. The printing on the European power cord is as follows: H05VV-F 3G0.75mm2 JUNJIAN.
It means: H is the European Harmonized System, 05 is the rated voltage of 300V/500V, VV is the PVC insulated PVC sheath, F is the flexible wire, 3G0.75mm2 is the 3-core ground wire, the conductor cross-sectional area is 0.75 square, JUNJIAN is produced Manufacturer Junjian Technology.
3. The printing on the national standard power cord is as follows: CCC 60227 IEC 53 (RVV) 300V/500V 3x0.75mm2 JUNJIAN.
It means: CCC is my country’s certification mark, 60227 IEC 53 is the standard to which this line of International Electricians belongs, RVV
It is the Chinese standard power cord representation method. VV is PVC insulated PVC sheath, 300V/500V is the withstand voltage, 3x0.75mm2 is a 3-core ground wire, and the conductor cross-sectional area is 0.75 square meters. JUNJIAN is the manufacturer of Junjian Technology.
There are also many models such as RVVB, RVVP, etc. The RVVB power cord refers to a flat power cord with a PVC insulated sheath, which is actually no different from the RVV power cord. Some are just different in appearance. The RVV power cord is round. Type power cord, while RVVB is a flat type power cord, and the P of RVVP stands for shielded wire
The thickness of the RVVB sheath is relatively thin, because the thickness of the sheath in the cross section of the flat RVVB is not as large as that of the RVV power cord, and the tensile and compression resistance are not as good as the RVV power cord.
When choosing a plug power cord, it is recommended to use an oxygen-free copper power cord, which has low resistance and good transmission effect. When used as a monitoring meter cable, pay attention to the voltage at the end of the camera. Because the lead wire has resistance, and the longer the wire, the greater the resistance, and the longer the transmission distance, the terminal voltage will decrease. Generally speaking, if the camera is connected to 12V, if it is lower than 10V, it may affect the normal operation.
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