Issues regarding the diameter of pipes for running network cables and the diameter of cables in explosion-proof areas
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The last edit to this post was made by The project’s progress on 2022-5-11 at 18:54. 1. The network between the local cabinets is a Profinet network based on industrial Ethernet; this description was provided by the manufacturer of the system, and it’s not clear whether it’s accurate. The local cabinets are connected in a daisy-chain configuration. Previously, DN40 pipes were chosen for running the cables, but it seems that this size is a bit too large. I looked up information regarding the diameter of network cables online; there are Super Category 6 shielded cables with diameters of 13 and 6.5. It’s not clear which diameter is suitable for normal use, nor what size is typically used when running cables through pipes. 2. Should instrument cables be computer cables or control cables? Are 1.0 gauge conductors used for cables in explosive hazard areas? Cable length within 100 meters
Refer to the cable conduit usage: the cross-sectional area of the cable should not exceed 40% of the conduit’s cross-sectional area. For optical fibers, attention must also be paid to the radius of curvature
For network cables, a DN20 pipe is sufficient; for instrument cables, control cables can be used, with 1.0 core being adequate
It depends on the specific model of the network cable; the 13 version probably has some additional material in its protective layer, such as a flame-retardant layer Choose according to your needs. It is necessary to determine whether the instrument cable is for analog or digital signals: control cables such as KVVP are used for digital signals, while computer cables such as DJYPVP are used for analog signals. The wire types should be selected in accordance with standard 50058; this depends on the explosion-proof rating and the way in which the cables will be installed, so there is no one-size-fits-all solution.
Section 7.1.2 of the chemical industry standard HG/T20512 does not specify any requirements for the cable cores in Zone 1
For analog signals, the computer cable used; the client wants to replace it with a control cable of type KVVP3P. Section 7.1.2 of the chemical industry standard 20512 does not specify the thickness of the cable conductors for Zone 1
The chemical industry cannot avoid GB either
Thank you; I hadn’t looked carefully at your suggestions before. I’ve now seen 50058
1. It’s better to use larger wire ducts for the pull handles on cabinets; otherwise, it will be difficult to add an additional wire later on for various reasons, unlike in control rooms where more space is available between the cabinets； 2. The thickness of Category 6a cables depends mainly on the shielding requirements; cables with dual shielding plus overall shielding have a diameter that is nearly twice that of unshielded cables. The choice depends on the specific needs. .