Issue of the laying spacing between instrument cables and electrical cables

In accordance with the requirements of HG/T20512, HG/T20513, GB50217 (Design Code for Cables in Electrical Engineering), and GB50093 (Code for Construction and Acceptance of Automation Instrumentation Projects), instrument cables (especially those for 4-20mA analog signals) should generally be laid separately from power cables. The specific principles are as follows: 1. General requirements: – Instrument signal cables should be installed separately, and it is not advisable to run them in the same tray as power cables. - When space is limited and the tray must be shared with power cables, isolation measures should be taken, such as installing effective metal grounding partitions within the tray. 2. GB50093 \"Code for Construction and Acceptance of Automatic Instrumentation Projects\" specifies that: Instrumentation cables for different voltages and different types of circuits should be laid separately ； - If, due to constraints, they must be installed in the same tray or cable tray, metal partitions with grounding measures should be used for separation, and the minimum spacing requirements must be ensured. 3. Actual on-site solution (in cases of space constraints): – Use metal grounding separation panels within the same cable tray to separate power cables from instrumentation cables, thereby ensuring effective and reliable electromagnetic shielding isolation ； - It is recommended that the clear distance between the instrument cables and the power cables after isolation be no less than 150 mm (this distance can be reduced slightly if a proper partition is in place with good grounding, but it must still be at least 50–100 mm). 4. Recommendations for the correct approach: – Prioritize compliance with current standards (such as HG/T20512 and GB50093), and try to run instrument cables in separate cable trays ； - When separation is indeed not possible due to site constraints, isolation measures (such as metal grounding partitions) can be employed and implemented upon approval. In summary, if it is indeed not possible on site to meet the requirements for separate wiring as recommended by the standards, it is permissible to wire them together within the same cable tray in accordance with the allowable conditions specified in GB50093 \"Code for Construction and Acceptance of Automation Instrumentation Projects\" and GB50217. It is also necessary to carry out relevant risk assessments, make the necessary confirmations, and document the approval procedures for design changes. .

That can’t be right; it’s not laid out in that way. The specifications state that for 220VAC instrument power cables, the same tray should be used with a metal partition in between, and they are not laid together with 380VAC cables

We just request that the power cables be deployed separately; there are no specific requirements for this