Those things about the acceptance of engineering lamps

This is an era of material desires. Most of the consumers have been shopping because of unscrupulous merchants. For these, we are angry and anxious, but there is no way. As an engineering lamp that consumers seldom contact, they even don't know what to do. Through years of accumulation, the author now lists some core matters concerning the acceptance of engineering lamps and lanterns, hoping to play some role in the acceptance of engineering lamps and lanterns. First, pay attention to the structural safety of engineering lamps: the structural safety of engineering lamps can be said to be the top priority of engineering lamps. Look at the classic style again, if you put aside the core role of safety. What is left is probably an incalculable aftermath. Generally speaking, consumers can put in two aspects when accepting engineering lamps and lanterns: first, are there short parts for engineering lamps and lanterns? Second, will part of the entire engineering lamps fall? 1. It is required that the engineering lamps should be checked with the accessory list after installation. In this way, it is not only convenient for you to observe the real appearance of the engineering lamps and find out whether it is consistent with the original design. At the same time, it is also obvious whether the spare parts of engineering lamps are defective or short. In particular, key components should be inspected. 2. Pay attention to the load-bearing and load of engineering lamps and lanterns: according to the national regulations, the load-bearing of engineering lamps and lanterns must reach the weight of more than 4 times of its own weight, and the bearing time shall not exceed 1 hour. For example, when an engineering lamp weighs 50 KG, you can hang another 200KG weight on the installed lamp and take it off after 1 hour. The engineering lamp must not fall off, and there is no potential safety hazard (Such as deformation, loosening, etc). With this common sense, you can estimate when you look at the goods. Of course, if you have doubts, you can also conduct simple tests. If the engineering lamp you choose is a ceiling lamp, you can also look at the height ratio of the ceiling Cup to the height ratio of the relevant screws to ensure that the lamp can be safely installed. If the length of the screw is shorter than the height of the suction cup, it will not be installed. If it can be installed, the wire opening should exceed the suction top by more than 10 wires to be safe. At the same time, shrapnel must be equipped to prevent the installed screw from loosening due to external force. In addition, after the engineering lamps are installed, you can gently shake the engineering lamps from side to side and pick them up. At this time, you can observe the conditions of other parts on the engineering lamps, whether there will be looseness or no fixation, is there any possibility of falling. If so, there is a certain structural safety hazard in this engineering lamp, and you can decide how to remedy it according to its severity. Second, pay attention to the Electrical Safety of engineering lamps: Regarding the Electrical Safety of engineering lamps, the professional testing department has special testing tools and methods, but it is far away from us, here are only some common sense and simple and feasible methods. First of all, check the wires of engineering lamps and lanterns to see the thickness of the wires of engineering lamps and lanterns: expressed in square millimeters, consumers can see the online signs, and if there is no sign, they can ask the merchants clearly. Thickness and current intensity of wires: Generally speaking, a 1 mm² wire can carry a current intensity of 5 amperes. The calculation formula is: current intensity: I = P/U. For example, when the total power of the engineering lamps is 6000 W, the current = 220 = 28A under the voltage of 6000/220 V; In other words, the main line of this engineering lamp must be able to pass 2. The current above 8A can work normally. In other words, the main line of this engineering lamp has to use 20 square wires as the main line. At the same time, the commonly used wire for the branch line of general engineering lamps and lanterns is 0. 5/0. 75 mm² wire, desk lamp, floor lamp is 1 mm² wire, and there is a rubber sleeve outside; All wires are marked with GB/T5013-1997 or GB/T5013-/2008 is preferred. Secondly, check the lamp cap of engineering lamps: Generally speaking, after an engineering lamp is lit, it will emit large heat in the relevant parts of the lamp, causing its temperature to rise. For ordinary engineering lamps, we generally require their Lamp caps to withstand temperatures above 90 degrees Celsius. For high heat dissipation engineering lamps such as incandescent lamps, we require their Lamp caps to withstand temperatures above 120-The temperature is 150 degrees Celsius. If the engineering lamp uses a plastic lamp holder, PBT material is generally required. If you are not at ease, you can test it yourself: set the temperature to 120- After 150, leave it for 1 hour and then take it out for observation. If there is no deformation, it means that the lamp cap of this engineering lamp is qualified. The other is to check whether the engineering lamps are grounded: all engineering lamps generally require grounding devices, and yellow-green lines are generally used. Some lamps without grounding devices are Class 0 lamps, which have been prohibited from being sold in China since January 1, 2009. Third, check the appearance and details of engineering lamps: Observe the overall harmony of engineering lamps, and whether there are any abnormal phenomena such as inclination, asymmetry, color difference and uneven lines; Whether the shape and size of the same parts of engineering lamps are basically the same; Whether there is any defect in the material of engineering lamps and lanterns will affect the function and use of lamps and lanterns.