If there is misunderstanding in the installation and application of the plug, it will cause various problems, which will endanger the later application and safety. A switch is arranged between the weatherproof socket resistor and the electromagnetic switch, the fuse and the electromagnetic switch are connected with a power line, the power line is provided with a normally open switch of the electromagnetic switch, and the normally open switch of the electromagnetic switch is connected with the jack. NEMA wiring device must be as small as possible in order to realize frequent commutation, but also to realize braking during commutation and acceleration after commutation. Therefore, it is necessary to adopt commutation device quickly and braking device effectively. IP54, that is, dust prevention is level 5: dust intrusion cannot be completely prevented, but the amount of dust intrusion will not affect the normal operation of the product; Waterproof grade 4: prevent splashing water from invading, and prevent splashing water from all directions from invading.1. There is a problem with cable selectionFor socket plugs with different rated voltages, the cable sleeves only have available cables with required diameters. If the diameter of the cable is too small, it will cause the gap sealing to be poor, and as a result, it can not exceed the antifouling and moistureproof. Especially outdoors, precipitation will seep into the interior along the cable, endangering the insulation layer, and it is very easy to go off or short circuit fault.2. The peeling of the cable is too longThe cable skin is stripped too long, instead of being clamped on the cable skin, there are only a few cores. It is easy to damage the cable or clamp it too loosely. If the cable is broken and the lights are cut off, the more serious problem will be short-circuit fault. Also, how many copper-core cables pass through the cable sheath that cannot be sealed.The same problem may be caused by using more than one cable, or using more than one cable through one person at the same time.For the same reason, the connection between the power plug and the RF connector must be connected by cables with the required diameter, and can not be replaced by any number of single-core cables.3. The long tapered cable sheath is randomly and diagonally cut.It is not flat according to the size of the receiving cable and the diameter mark on the cable sleeve, just like a chip pen cut at random. It's not elegant and can't be sealed. The chart below shows the problems at different levels.4. The terminal screws are too loose.Or the connection between the plug and the cable is locked by the connecting terminal screw. If you don't notice that the screw is too loose, it is easy to cause flashover or increase the contact resistance between the power plug and the transmission line, heat up the connecting terminal, and damage the socket plug in serious accidents.5. The firm screw lock is too looseIn the whole process of disassembly and reassembly of industrial plugs and sockets, plugs are the supporting components during connection and insertion, for example, the lock of plug seat and power plug housing, plug sleeve seat and the back seat of power socket is too loose, and the whole process of dialing and inserting is very easy to loosen or pull off, and even the screw holes are destroyed.VI. Cable sealing ring is not installed.After removing the power plug, forget to put the cable sealing ring back, or do not tighten the cable screw cap, which will lead to poor antifouling and moisture-proof ability.7. Do not pay attention to the position of the power socket when fixing it.Industrial plugs, waterproof case-type surface-mounted sockets are all fixed on the inner wall or wall, and the installation orientation is emphasized. Usually, the key slot of the power socket should be at the bottom. After the power plug is plugged in, the cable will loosen along the road surface. However, in the following figure, the power socket is upside down from left to right. In this case, once the power plug is plugged in, the cable will be bent 180 degrees loosely by the sheet metal, so it is very easy to destroy. If there is water on the power socket, it will easily flow into the interior.VIII. Installing outdoor power outletsUnder outdoor conditions, installing the power socket outside the power distribution cabinet will be damaged by wind, sun and rain for a long time, which will accelerate the embrittlement of the plastic shell of the power socket and endanger the service life and safety.The correct way is to install the power socket in the box or in a dark place to prevent wind, sun and rain.