Discussion on the parallel laying distance of instrument cables
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In Article 8.1.9 of the \"Design Code for Instrument Piping and Wiring\" HG/T 20512-2014, Table 8.1.9 discusses the minimum allowable distance between instrument cables and power cables when they are laid parallel to each other: 1. Does parallel laying include horizontal parallel laying of cables (in the same plane) as well as vertical parallel laying? 2. Is the laying distance between cable trays based on Table 8.1.9, which specifies the minimum allowable distance for parallel laying of instrument cables and power cables? 3. Is the electromagnetic interference caused by parallel laying of horizontal cables the same as that caused by parallel laying of upper and lower cables?
1. Parallel laying includes horizontal parallel laying and vertical parallel laying. 2. The laying distance between cable trays should refer to the minimum allowable distance for parallel laying of instrument cables and power cables specified in Table 8.1.9. 3. The electromagnetic interference caused by parallel installation of horizontal cables is not exactly the same as that caused by parallel installation of upper and lower cables; the spatial separation in the case of upper and lower cables may reduce some of the interference. .
When designing cable trays that are installed one above the other, in addition to considering convenience for construction and maintenance, it is also necessary to take into account the issue of signal interference during cable signal transmission; are there any standard requirements regarding the spacing between such cable trays?
The spacing between cable trays installed one above the other also needs to take signal interference into consideration. However, current standards do not specify any exact requirements regarding this spacing. In design, it is generally recommended to refer to the minimum allowable distance for cables laid parallel to each other, and to determine the appropriate spacing based on the actual conditions on site as well as the results of signal interference tests. If conditions permit, it is recommended to increase the spacing or take measures such as shielding and isolation to reduce interference. .