看你的电工基础知识牢固吗？(6)

homestay · 发表于 2010-2-14 18:13

how many supports do you need for a 20 ft cable tray?

jack_lai · 发表于 2010-2-15 22:36

The question remains murky?
Firstly, the tray is metal tray or basket tray?
If it is metal tray. The support I guess should be 3? I need check the code about this. Usually you just ask your foreman you can get the answer immediately

Allan2008 · 发表于 2010-2-16 15:20

我们工作的20尺tray都是两点支撑的。

homestay · 发表于 2010-2-16 17:35

Different tray has different support requiement. the right answer is : as per manufactures description, minimum 2.

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[技术互助] 看你的电工基础知识牢固吗？(6)