1 by hand, look at the appearance. Good quality switch mostly use bulletproof plastic (PC) and other advanced engineering plastics, fire performance (flame retardant), moisture resistant, anti-impact performance, UV and so good, the surface texture is good. When you purchase should first focus feel, with touch switch preliminary determination of the material. To feel material uniformity, smooth surface texture. In general, the surface rough, feels there is a thin, crisp and feeling of products, the performance can not be trusted. Good switch panel requires no bubbles, no scratches, no stains. Switches Toggle lightweight feel without tight plug.
2 weigh weight, heavy material. Weigh the weight of a single switch. High-end switch should have sufficient weight, qualified products are generally "real material." Very light weight products are suspected of cutting corners when purchasing should be cautious, because only the switch inside for the production of "carrying parts" of the copper thickness, the weight of a single switch will be heavy, while the inside of the copper and the metal contacts is a key part of the switch, if it is a thin copper alloy or will not have the same weight and quality. Another good switch general spring hard, when the switch have more sense of strength, while the switch is very soft and poor, and even switch handle frequent stops in the middle of the phenomenon will cause safety problems.
3 Note that the contacts and ratings. Switch contacts directly determine the safety performance and service life, better quality usually copper switch with a reasonable choice, and to ensure sufficient thickness to improve the structure retention and conductivity. Switch to select silver lithium alloy contacts, and more durable than silver contacts. According to the rated voltage and rated current to configure the switch, generally indicated switching voltage and current should not be lower than the actual use requirements. Now ordinary residence are single-phase power line, rated voltage election 250V; rated current selection: Known using the device, you should select is greater than 1.25 times the rated current of the device; unknown when using the device should not be less than 5A, considered part of the appliance power, generally select the rated current less than 10A or 16A is not good, but also to distinguish between the current value "A" and "AX", the former is only applicable to ordinary incandescent lamp load, which is not only applicable to incandescent lamps, fluorescent lamp load is also applicable . For example: when used to control fluorescent lamps, fluorescent lamps are used to allow for controlling the switches that the logo should be clearly identified. Example: 10AX 250V, means the maximum rated current of 10A, and can be used for fluorescent loads, use a voltage up to 250V.
4. Use formal and professional manufacturers. Relating to the quality of the electrical switch the normal use, and even the ease of life. Many small manufacturers switch sometimes unreliable, will not take long, and frequent replacement is obviously very troublesome, so it should be used in formal and professional manufacturers. Their product is shipped to go through conductive properties, appearance and structure, security, performance and other key indicators of a rigorous assessment, it is generally used flame retardant, heat insulation material; carrying parts have arc resistance, heat resistance, hardness, the use of consumer Arc structural design, formal product will generally be effective commitment to consumers, such as "guaranteed service life 1-2 years", "continuous switch 40,000 times" and so on.
