Can two different electrical devices be connected from an explosion-proof box using a multi-core wire?
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I have a magnetic float flow meter (with a 2-wire transmitter operating at 24V), along with a solenoid valve for controlling it; this solenoid valve operates on AC220 voltage and has a power consumption of 4.5 kW. The flow accumulation device is located inside an explosion-proof enclosure, and all the wires are already connected there. To make wiring easier, I used a multi-core wire to connect everything together, leading from it to both the solenoid valve and the transmitter of the magnetic float flow meter. I’m not sure if this will work; I hope everyone can give me some advice
Are you overthinking it? The key is whether the transmission and the valves are in the same position? Even when they are connected, you need to remove the shielding layer for the wiring as well. . It does not meet the explosion-proof requirements. . . .
I covered it with a hose and an AD flame-retardant connector; the wires are not visible from the outside. The key issue is that one is a 24V signal while the other is for a 220V solenoid valve – will using them together have any impact?
220 and 24 volts go into one junction box. I don’t remember what the regulations say on this, but I personally think it’s not proper. Additionally, the 220V power supply can sometimes interfere with the MA signal. . . Anyway. The disadvantages outweigh the advantages. Why must it be done this way? Are there no two-core wires left? If there are no two-core wires, use two four-core wires and connect them separately. . Don’t skimp on money
It definitely won’t work. Different power supplies sharing one enclosure, as well as the sharing of cables, both violate the specifications. If it must be connected, the prerequisite is that the two instruments must be placed together; it’s best to use a cable designed for split-screen display. But there are very few that are this dry
Signals of different voltage levels cannot be transmitted through the same multi-core cable.
8.1.6 In situations where there are numerous on-site measurement points, it is advisable to use junction boxes; such boxes should be placed in areas where the measurement points are concentrated and where maintenance is easy to carry out. Cables entering and leaving the outdoor-mounted junction box should preferably enter from the bottom and exit from the bottom, or enter from the side and exit from the side. 8.1.7 Signals of different levels should not share the same multi-core cable and junction box. 8.1.8 Intrinsic safety and non-intrinsic safety signals should not share the same multi-core cable or the same junction box. 8.1.9 When instrument signal cables are laid across power cables, they should cross at a right angle; when laid parallel to power cables, the minimum allowable distance between them shall comply with the provisions in Table 8.1.9 of this specification.
The instrument signal wires of the 24V grade must not share the same multi-core cable as those of 220VAC, nor shall they share the same junction box.
I can only put in one more. The box has to be used as it was before; what impact does having 220V power supply inside the box have?
I can only put in one more. The box has to be used as it was before; what impact does having 220V power supply inside the box have?