I believe I should continue writing for this: http://hoanghung.weebly.com/professional-sharing/cabling-system-cable-ladder-cable-tray-for-instrument-and-telecom-system-part-1
but I have been stuck with my current work, so deep in shit I can't even concentrate on anything else any more.
However, regarding cable tray sizing, I have done some remarkable work.
During our project, we faced a huge issue of space in Main Control Room (Local Equipment Room - LER), where all the cables must be linked to: Not enough space to support all of the cable. If you have gone through my previous post, you should known some basics of how cable tray is sized.
And with the biggest size on the market (900mm Width, 150mm Height), it's not enough. We need 8 of them, parallel, to compliance to the project specification requirement. And the construction team gave us middle finger regarding our proposal of 4 ladders in parallel, let alone 8.
So, we need to dig deeper in what exactly, which cable is going somewhere. We have multiple entries point (7 to be exact, and each, going on a different direction.
So how could I get a sizing that can accommodate just nice the amount of cable going through the room?
but I have been stuck with my current work, so deep in shit I can't even concentrate on anything else any more.
However, regarding cable tray sizing, I have done some remarkable work.
During our project, we faced a huge issue of space in Main Control Room (Local Equipment Room - LER), where all the cables must be linked to: Not enough space to support all of the cable. If you have gone through my previous post, you should known some basics of how cable tray is sized.
And with the biggest size on the market (900mm Width, 150mm Height), it's not enough. We need 8 of them, parallel, to compliance to the project specification requirement. And the construction team gave us middle finger regarding our proposal of 4 ladders in parallel, let alone 8.
So, we need to dig deeper in what exactly, which cable is going somewhere. We have multiple entries point (7 to be exact, and each, going on a different direction.
So how could I get a sizing that can accommodate just nice the amount of cable going through the room?
It's actually quite simple:
- First, calculate the total cross sectional requirement from each entry point. This could be done through cable routing before getting to the room.
- Second, color code all the different termination point and system. In most system, you have Telecom, PCS/DCS/BPCS , ESD/PSD/SIS , F&G /FGS as major grouping, and normally all the cabinets of same group are in 1 area.
- Route each group of cable to the cabinet by pasting the cable ladder crossection area requirement to a cell. For different system or different source, move down 1 line. For vertical, do it horizontal.
- After matching all of them, sum it vertical for horizontal tray, and sum it horizontal for vertical tray.
It's kind of hard to explain, so I will give my work file for you to get the hang of it. It sounds and looks complicated, but once you started, it starts to make sense.
And guess what, from 4 ladders, I manage to get it done with only 2 x 900mmW + 1 x 600mmW only, which is huge implact on constructiblity of the project. I'm quite proud of it!
- First, calculate the total cross sectional requirement from each entry point. This could be done through cable routing before getting to the room.
- Second, color code all the different termination point and system. In most system, you have Telecom, PCS/DCS/BPCS , ESD/PSD/SIS , F&G /FGS as major grouping, and normally all the cabinets of same group are in 1 area.
- Route each group of cable to the cabinet by pasting the cable ladder crossection area requirement to a cell. For different system or different source, move down 1 line. For vertical, do it horizontal.
- After matching all of them, sum it vertical for horizontal tray, and sum it horizontal for vertical tray.
It's kind of hard to explain, so I will give my work file for you to get the hang of it. It sounds and looks complicated, but once you started, it starts to make sense.
And guess what, from 4 ladders, I manage to get it done with only 2 x 900mmW + 1 x 600mmW only, which is huge implact on constructiblity of the project. I'm quite proud of it!
book3.xlsx |