1. Location Selection Electrical lines should be laid where there is a low risk of explosion or where it is far from the source of release.
2. Laying Mode Selection Explosion Hazard The electrical lines in the environment are mainly explosion-proof steel pipe wiring and cable wiring.
3ã€.Isolation Sealing When laying the channels of electrical lines and protective tubes, cables or steel pipes through partitions or floors between areas with different explosion hazard environment levels, non-combustible materials should be used to block them tightly.
4, the choice of wire material explosion hazardous areas within the scope of the risk zone 1, the distribution line should use copper conductors or cables. Multiple stranded copper core cords or stranded copper core cables should be used where there is severe vibration. Aluminum core power cables must not be used underground in coal mines.
Within the scope of Zone 2 of the Hazardous Degree of Explosion Hazard, the power lines shall use aluminum core conductors or cables with a cross-sectional area of ​​4 mm2 and above, and the lighting circuit may use a cross-sectional area of ​​2.5 mm2. And above aluminum conductors or cables.
5. The selection of the section of insulated conductors and cable cross-sections in the zone 1 and zone 2 of the current-carrying capacity shall be allowed. The allowable ampacity of the conductor shall not be less than 1.25 times the rated current of the fuse melt rated current and the breaker time delay overcurrent release. The allowable ampacity for the branch line leading to the low-pressure cage induction motor shall not be less than 1.25 times the rated current of the motor.
6. Electrical connections The intermediate connections of the electrical circuits in zones 1 and 2 must be internal to the explosion-proof junction boxes or splice enclosures that are compatible with the hazardous environment. Zone 1 should be flameproof junction box, and zone 2 can be increased safety junction box.
When using aluminum core cables or conductors in the electrical circuit in Zone 2, it must be reliable so that the user can correctly install and repair it.
2. Laying Mode Selection Explosion Hazard The electrical lines in the environment are mainly explosion-proof steel pipe wiring and cable wiring.
3ã€.Isolation Sealing When laying the channels of electrical lines and protective tubes, cables or steel pipes through partitions or floors between areas with different explosion hazard environment levels, non-combustible materials should be used to block them tightly.
4, the choice of wire material explosion hazardous areas within the scope of the risk zone 1, the distribution line should use copper conductors or cables. Multiple stranded copper core cords or stranded copper core cables should be used where there is severe vibration. Aluminum core power cables must not be used underground in coal mines.
Within the scope of Zone 2 of the Hazardous Degree of Explosion Hazard, the power lines shall use aluminum core conductors or cables with a cross-sectional area of ​​4 mm2 and above, and the lighting circuit may use a cross-sectional area of ​​2.5 mm2. And above aluminum conductors or cables.
5. The selection of the section of insulated conductors and cable cross-sections in the zone 1 and zone 2 of the current-carrying capacity shall be allowed. The allowable ampacity of the conductor shall not be less than 1.25 times the rated current of the fuse melt rated current and the breaker time delay overcurrent release. The allowable ampacity for the branch line leading to the low-pressure cage induction motor shall not be less than 1.25 times the rated current of the motor.
6. Electrical connections The intermediate connections of the electrical circuits in zones 1 and 2 must be internal to the explosion-proof junction boxes or splice enclosures that are compatible with the hazardous environment. Zone 1 should be flameproof junction box, and zone 2 can be increased safety junction box.
When using aluminum core cables or conductors in the electrical circuit in Zone 2, it must be reliable so that the user can correctly install and repair it.
It is similar with intermediate for usage. Although it is not main content, it is very important for the finished products. Auxiliary Agent could improve the effects of finished product, and spread their usage in different fields.
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