九九精观看品视频在线,精品无码一区二区三区在线,99久久99久久免費精品蜜桃久久亚洲欧美日本精品,国产精品区一区二区免费,亚洲国产精品97久久无色无码亚洲中文字幕久久久一区,国产18禁男女无遮挡网站,国产伦精品一区二区三区,日产一级二级片无码免费在线看

Zhongshan Hotel lighting industry Co., Ltd. tells us what should be paid attention to when choosing lighting

2020-06-18 1851

  


  What should be paid attention to when choosing lighting safely?

  Pay attention to the protection against electric shock. The electric shock caused by lighting is generally caused by the use of non-conforming lamp holder or live parts of lighting without cover and other anti electric shock protection methods. The normal thing is to screw in the bulb when using. After the lighting is electrified, people should not touch the live parts.

  Pay attention to the cross-sectional area of the wire used for lighting top:

  When purchasing, you can see the symbol printed on the insulating layer outside the wire on the lighting. The sectional area of the wire should be at least 0.5mm/m2. In order to reduce the cost, some manufacturers use only 0.2mm/m2 of conductor cross-sectional area on the products. In abnormal condition, it will scorch the wires and cause short circuit after the insulation layer is burnt out, resulting in risk.

  Safety selection of lighting: pay attention to the structure of lighting:

  (1) There shall be no sharp edge at the entrance and exit of the metal pipe through which the wire passes. The method can chamfer or add a sheath on the metal parts to prevent the wire from being cut and the metal parts are electrified, resulting in the risk of electric shock.

  (2) Table lamp, floor lamp and other movable lamps shall be equipped with wire fixing frame at the entrance of the power line, because 1. Stress relief, to prevent the wire on the terminal from falling when the wire is under tension, resulting in electric shock due to the charged metal shell; 2. To prevent the power line from touching the heating element when it is pushed back, to prevent the overheated wire from melting the insulation layer, and the exposed wire from contacting the metal shell, Electric shock caused by electrified shell.

   Zhongshan Hotel lighting industry company http://m.xtyabo.com/


无码专区无码专区视频网址| 日韩精品中文字幕无码无卡 | 欧美性生活一级片| 久久久久人妻一区精品| 亚洲成AV人综合在线观看| 国产欧美久久一区二区三区| 国产一级a毛一级a看免费视频视频一区二区三区| 久久精品亚洲一区二区三区浴池| 亚洲国产精品成人无码区| 又粗又紧又湿又爽a视频| 亚洲欧美成人综合久久久| 日本熟妇HDSEX视频| 天干天干天啪啪夜爽爽色| 久久人人爽人人爽人人片AV超碰| 激情综合色综合啪啪开心| 精品熟妇视频一区二区三区| 国产精品无码AⅤ在线观看播放| 在线精品观看一区欧美国产精品不卡在线观看| 伊人久久大香线蕉av五月天| 免费无码又黄又爽又刺激| 亚洲精品国产偷五月天丁香| 亚洲精品国产一区二区三在线观看| 日本不卡在线视频二区三区| 国产三香港三韩国三级| 久久99国产精品久久99| 少妇午夜中文字幕无码无删减| 无码精品一区二区久久久| 国产在线精品观看一区欧美国产精品不卡在线观看| 99久久99久久免費精品蜜桃| 亚洲精品成人网站在线观看| 丁香五月综合久久激情| 97在线精品国自产拍中文| 少妇的肉体在线观看| 波多野结衣乳巨码无在线观看| 人妻大战黑人白浆狂泄| 一区二区三区精品视频在线观看| 揄拍成人国产精品视频| 97日日碰人人模人人澡| 丰满少妇无套内射一区| 国产精品喷浆丁香美女社区| 成人a级视频在线观看|