Seeking advice on the selection and installation of instrument cable trays

1. Can ladder trays be used for control instrument cable trays? It’s like a ladder, with no bottom or top, right? What type of cable tray should be used? Can a trough-type cable tray be used? Generally, tray racks are used. 2. Can the instrument trays and the electrical power trays be laid side by side horizontally (with their sides touching each other)? What should the minimum distance be? When laying in upper and lower layers, the instrument tray should be on top – what should the distance be? It’s best not to be too close, as it will cause signal interference! 3. Are there any standards? Please give me some advice. Yes, there is. -

There are specified distances for instruments and power cable trays; these distances vary depending on the voltage and current levels, and this can be found in the relevant standards.

I’d like to ask gently, which design institute is it? 1. The common type is a tray frame. 2. Instrument trays and electrical power trays are laid side by side horizontally; there is a specified minimum distance between them, which depends on the voltage and operating current of the power cables as well as the length over which they run parallel to each other. 3. HG/T 20512-2000 \"Design Specifications for Instrument Piping\", but it isn’t very detailed; the \"Petroleum and Chemical Industry Automatic Control Design Manual\" can also be referred to

Instrument trays should use trough-type trays, and trapezoidal trough trays should not be used. When laid in layers with electrical trunking, it should be located above the electrical trunking. When laid in parallel with electrical trunking, the instrumentation discipline specifies that it should be greater than 800 mm.

My point one: there is no requirement that instrument trays must use Groz-type; trapezoidal ones are also acceptable. The Groove-type cable trays seem to have better interference resistance, but if you use shielded cables then the impact won’t be significant. We’ve used quite a few trapezoidal-shaped cable trays for the instrumentation in our offshore platforms ； II: When instrument cable trays are installed parallel to electrical power cable trays, the distance between them should be no less than 600 mm (this is stated in the \"Construction Manual for Instrumentation Projects\"); for specific standards, refer to GB50093-2002, \"Code for Construction and Acceptance of Automation Instrumentation Projects\" ； Or GB50131-2007, Code for Acceptance of Construction Quality of Automatic Instrumentation Projects. Just my personal opinion; feel free to criticize~

Everything said upstairs is correct, but either it’s not entirely accurate or it’s not clear enough. Let me help you answer this. Assuming you are dealing with petrochemical plants; if not, please refer to GB50168. 1. Can ladder-type cable trays be used for automatic control instrument cables? It’s like a ladder, with no bottom or top, right? What type of cable tray should be used? Can a trough-type cable tray be used? Tray-type cable trays are usually used, that is, the tray style ； However, there is no strict prohibition against the use of trapezoidal cable trays; note the standard wording “it is advisable”” ； Meanwhile, if it is a armored cable, then a trapezoidal cable tray can of course be used. 2. Is it okay to lay the instrument cable tray and the electrical power cable tray horizontally side by side (with their sides touching each other)? What should the minimum distance be? When laying in upper and lower layers, the instrument tray should be on top – what should the distance be? Parallel laying is feasible; the minimum distance is determined based on the length of parallel laying and the volt-ampere characteristics of the power cable, and it ranges from 50 to 1200 mm (this value seems to be set rather conservatively; I personally recommend a value of >=250). From an analytical perspective, instrument trays should generally be placed below the power cables, but according to standards, they can be placed either above or below. It is recommended to keep a distance of 1 meter. 3. Are there any standards? Please give me some advice. GB50168 and SHT3019-2003 Standards for the Design of Instrumentation and Pipeline Systems in Petrochemical Industries can be used as references