Can the instruments and electrical systems share the same cable trench?
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Is it compliant to place both instrument cables and electrical cables in cable trays and then put them in the same cable trench at regular intervals? Are there any documents stating that this practice is not allowed?
It is compliant to place instrument cables and electrical cables in the same cable trench at certain intervals from each other. Under normal circumstances, there are no specific documents that explicitly prohibit this practice. However, the following points need to be noted: 1. The voltage levels and signal types of the instrument cables and electrical cables should be compatible with each other to avoid interference. 2. The design and installation of cable trenches shall comply with relevant **standards and specification requirements to ensure the safe operation and maintenance of cables. 3. In cable trenches, appropriate separation distances should be established based on the actual conditions, to prevent interference or short circuits between different cables. 4. In actual installation, design and construction should be carried out in accordance with specific project requirements and standard specifications to ensure the safety and reliability of the cables. In summary, it is acceptable for instrument cables and electrical cables to share the same cable trench, but various safety factors must be taken into account, and relevant design and construction requirements must be followed. If necessary, it is recommended to consult a professional electrical engineer or experts in the relevant field to obtain more specific guidance and advice. .
Look at the cable type: whether it is an explosion-proof cable or an intrinsically safe cable, and also consider the voltage rating. With the separation of intrinsically safe and flameproof types, the electrical signal cables can be placed together with the flameproof cables of the instruments. It is generally not recommended to place electrical power cables and explosion-proof cables for instruments together, as alternating current can easily cause interference.
You didn’t read the question carefully; the cables have already been placed in their respective cable trays. All that’s needed for those trays is to meet the distance requirements and the proper vertical arrangement