Cable Trunking Sizing

I check the guide, but it seem not so clear.

Instead of trying to find out who i am, why dont you try to understand the answer. As i wrote above, i hope you please DO NOT comment (any) my question if you do not like. I dont know how you are excellent, how you are professional, but i think you are so haughty. Of course you can delete my post, (i guess you are powerful moderator of forum), but no problem, i can still live without your comment.

No comment anymore, OK?

I think what many are trying to tell you is that there is too much to the subject to give a short answer. Plus, it seems that English is not you first language and that makes it hard to understand the question. That, in turn, makes a potentially very dangerous situation if one gives an answer to what they think you are asking, when you are actually asking something different. If you are asking about the current carrying capacity of wires, that is in section 310 of the National Electrical Code. If you are asking how many wires can go in a conduit, that is annex C of the Code. If you are asking about how to lay the cable(support, depth, bend radius, etc.) that is too involved to give a short answer. I have never worked anywhere but the USA, and I do not know where you are, so I don't know what code you may be required to use. Please don't be offended by my answer. I was reluctant to reply at all after the way you lashed out at those trying to warn you what dangerous ground you are treading. -- JHF

Thanks for your clear explain. May be my question is not so detailed. The fact that i only want to know the way to select suitable cable trunking and the way to install cable in trunking correctly. For example, how many percent fill is allowed of cable in trunking, or how many layer of cable is allowed, the distance between cables...I would be grateful if you could send me application notes about these for reference. Thanks.

Information can be found in the relevant wiring standards you are working to. As these are not free and we don't know what country you are in, what standards you are working to and the current of the cables or application we cannot advise on this point.

If you want something free try the cable manufacturer's website for application notes which give some indication. That and some common sense to allow the trunking to have enough capacity for cable installation, inspection and potential upgrading in the future.

Refer manufacturer's literature

Also found in BS7671-IEE wiring regulations