Issues related to the installation of instrument cable trays

Regarding the installation of instrument cable trays, it is recommended to refer to relevant standards such as the \"Code for Installation of Cable Trays in Electrical Installation Works\". Generally, the installation of cable trays should avoid areas with high temperatures or high humidity, as well as areas prone to mechanical damage. If it is not desired to install cable trays in the distribution room, the following options can be considered: 1. Use trenches or tunnels to run the cables, thereby avoiding the need to run wires inside the distribution room. 2. Use pre-installed conduits or bus ducts in the walls for cable connection and routing. 3. If conditions permit, the cable tray can be placed outside the distribution room or in a corridor, with access to the distribution room provided through junction boxes. The final solution must take into account the actual conditions on site and the requirements of electrical design, while also complying with local electrical installation standards and safety regulations. It is recommended to have detailed discussions with the design and construction firms to find the best solution. .

According to the Code for Electrical Design of Buildings, cable trays can be installed through walls in distribution rooms.

I might not have made myself clear; I’m referring to the instrument tray

I’m dealing with instrument trays; I don’t want to run them into the distribution room. I’d like to know what regulations support this approach

This post was last edited by Annoying, annoying, annoying_CwWvF on 2025-2-7 at 11:50. Firstly, no such specification exists that prohibits instrument cables from passing through the power distribution room; in fact, the control cables for many motorized devices need to be run from the power distribution cabinets or frequency converter cabinets in the power distribution room to the control cabinets in the control room in order to enable control. If you want to convince the owner to agree with your idea, you can consider the following points: 1. Refer to HG/T 20512-2014, the Design Specification for Instrument Piping and Wiring – this standard requires that instrument cables be kept away from electromagnetic interference, and it also specifies the required spacing between instrument signal cables and high-voltage cables when they are laid parallel to each other； 2. Safety: Distribution rooms are typically equipped with high-voltage equipment, while instrument cables operate at low voltages. Running instrument cables through distribution rooms increases the risk of high-voltage currents interfering with low-voltage signals, thereby raising safety risks during construction.

This post was last edited by Annoying, annoying, annoying_CwWvF on 2025-2-7 at 11:49. 1. Refer to HG/T 20512-2014 Standard for the Design of Instrument Piping and Wiring; instrument cables should be kept away from electromagnetic interference. Additionally, this standard specifies requirements regarding the spacing between instrument signal cables and high-voltage cables when they are laid parallel to each other

2. Safety: Distribution rooms are typically equipped with high-voltage equipment, while instrument cables operate at lower voltage levels. Running instrument cables through distribution rooms increases the risk of high-voltage currents interfering with low-voltage signals, thereby raising safety risks during construction and so on

Well, there is a strict rule: cables that are not related to the distribution room should not pass through it

Since the power cable comes from the distribution room, how can it be used without a cable tray? It can be installed along the wall or via a cable tray from the back of the distribution panel; in many cases, the cable tray is not visible from the outside.

You should provide the floor plan of the individual building, so that everyone can give you accurate judgments and suggestions.