Laptop to take the battery, directly with the power cord plug, you can use it?
Voltage levels are 300 / 300V, 300 / 500V, 450 / 750V, 0.6 / 4kV, etc., which is commonly used voltage level. When ordering according to your use of environmental conditions, use the size of the load and voltage level selection. Inspection can only test the size and appearance of the structure, some electrical parameters need special equipment to measure, you can measure the insulation thickness, conductor diameter, insulation diameter and so on. General wire and cable to buy some formal large enterprises, although there are losses side of the phenomenon, but generally its electrical performance can guarantee.
Notebook computer to take the battery, directly with the power cord plug, you can use. But if the sudden power failure, then the notebook will cause harm. Notebook battery maintenance: First, the laptop battery does not need the first three times each time 12 hours of charging. Second, if you can provide a stable voltage in the use of the environment is best to use an external power supply, then you can consider removing the battery. Third, if you do not use a laptop or laptop battery for a long time, it is best to save 50% of the battery power to save.
YJV, VV refers to the cable model. Vv cable is: PVC insulated PVC sheathed power cable. Yjv cable is: cross-linked polyethylene insulated PVC sheathed power cable. Its voltage range from 1kv to 35kv range, the characteristics of steel armor, steel armor, no armor, flame retardant and non-flame retardant and so on. VV22-4 * 25 + 16 refers to the 5-core cable (4 25 plus a 16 square)
YJV and VV are the main models of commonly used power cables. VV cable is: PVC insulated PVC sheathed power cable; YJV cable is: cross-linked polyethylene insulated PVC sheathed power cable. These two are currently used in industrial and mining enterprises and residential areas are more, but only in common occasions, due to the needs of the characteristics, so with the former suffix, in front of some plus NH or ZR, said the fire-resistant and flame-retardant, Plus P, that the shield type. VV22-4 * 25 + 16 Strictly speaking should be VV22-0.6 / 1-4 * 25 + 1 * . said PVC insulated PVC sheathed striped armored low voltage power cable, 22 said strip Armor, 0.6 / 1 that voltage level, 4 * 25 + 1 * 16 cable that a total of five core, of which four 25 square and a 16 square, which is used in the three-phase five-wire system, A, B, C, N is 25 square feet and the PE line is 16 square.
