1. Electrical circuits should be laid in areas with low explosion hazards or at a distance from the release source, avoiding places that are susceptible to mechanical damage, vibration, corrosion, dust accumulation, and hazardous temperatures. When avoidance is not possible, preventive measures should be taken.
2. The selected low-voltage cables or insulated wires must have a rated voltage higher than the operating voltage of the line and not lower than 500V. The insulated wires must be laid inside conduits.
3. Overhead power lines of 10kV and below are strictly prohibited from crossing explosive gas environments; The horizontal distance between overhead lines and explosive gas environments should not be less than 1.5 times the height of the tower.
74. When installing cables and their accessories, their positions should be able to prevent external mechanical damage, corrosion, or chemical effects (such as the influence of solvents), as well as high temperature effects (see also 6.1.2.4.4 for this safety circuit) according to the actual situation. If the above situation cannot be avoided, protective measures should be taken during installation, such as using conduits or selecting cables (to minimize damage, armored cables, shielded wires, seamless aluminum sheathed wires, mineral insulated metal sheathed or semi-rigid sheathed cables, etc. can be used).
5. Untamed single core wires should not be used as conductive wiring unless they are installed in a distribution panel, enclosure, or conduit system.
 |
||||||
 |
||||||
|
||||||
 |
||||||
|
||||||
 |
