The types of commonly used lamps are chandeliers, wall lamps, ceiling lamps, floor lamps, desk lamps, ceiling lamps, etc. No matter what kind of lamps are used, the most important thing is whether the safety index is qualified. The owner can identify from the following aspects.
(1) Identification from the appearance of lamps
① Marking of lamps
When buying a lamp, you should first check the marks on the lamp, such as trademark, model, rated voltage, rated power, etc., to determine whether it meets your own requirements. Marking safety is a basic requirement in the safety performance of lamps, and the rated power is particularly important. For example, a lamp with a design of 40 watts. Because the unmarked rated power, users are likely to install 60 watt or 100 watt bulbs, which may cause deformation of the housing. , Insulation damage, or even electric shock may cause fire.
In addition, the standard stipulates that the minimum cross-section of the wire used on the lamp is 0.5 square millimeters. Some manufacturers use the cross-sectional area of ??the wire less than 0.5 square millimeters to reduce the cost. This may cause the wires to scorch and the insulation layer to burn out. A short circuit occurs, which is dangerous. At the time of purchase, you can look at the marks printed on the insulation layer outside the wire on the lamp.
②Identify from the protection against electric shock
Attention should be paid to the protection against electric shock. After the lamp is energized, no live parts can be touched, and there is no danger of electric shock. If you buy an incandescent lamp (such as a chandelier, wall lamp), install the light bulb without power, if you can't touch live parts with your little finger, the anti-shock performance is basically consistent.
As a result, the anti-shock performance of lamps does not meet the standards. Generally, it is caused by the use of anti-shock protection measures such as non-compliant lamp holders or live parts of lamps without covers.
(2) From the structure identification of lamps
① There should be no sharp edges at the entrance and exit of the metal pipe through which the wire passes, so as to avoid cutting the wire, causing the metal parts to be charged, and causing a risk of electric shock.
②Removable lamps such as desk lamps and floor lamps should have a wire fixing bracket at the entrance of the power cord. Its function is to prevent the power cord from touching the heating element. The overheating of the wire causes the insulation layer to melt. The exposed wire contacts the metal shell and the shell is live. And cause electric shock.
(3) Identification of accessories used on lamps
①If the electronic ballast is used in the lamp, the lamp with abnormal protection electronic ballast should be selected. The so-called abnormal protection refers to the protection given when an abnormal state occurs in the fluorescent circuit, so that the electronic ballast The flow device can still work normally.
② If the lamp is an inductive ballast, look at the marking on the ballast and try to choose one with a higher Tw value (such as Tw130), especially when the heat dissipation condition of the lamp is poor, you should pay more attention to this point. Tw is the rated maximum working temperature of the ballast coil. At this temperature, the ballast can work continuously for 10 years.