Installation of Explosion-proof Distribution Box and Power Strip

Explosion-proof power strips in distribution boxes must be installed following strict safety standards, proper grounding, certified cabling, and precise mounting to ensure safe operation in hazardous environments.

Preparation and Safety Measures

Before installation, ensure the power supply is completely turned off to prevent electrical hazards. Only use cables, connectors, and components certified for explosion-proof applications (EX or ATEX markings), resistant to flame, impact, and mechanical damage . Verify that the distribution box's explosion-proof rating matches the hazardous area classification (e.g., Zone 1, Zone 2, Zone 21, Zone 22) to prevent catastrophic failure . Unauthorized modifications to the box or its components are strictly prohibited .

Mounting and Positioning

• Install the distribution box in a dry, ventilated, and accessible area, away from heat sources, collision risks, and moisture .
• Maintain a standard installation height of approximately 1.8 meters for convenient operation .
• Ensure the box is level and vertical, with a maximum inclination of 5 degrees .
• Secure the box to the foundation using bolts and, if necessary, shims to achieve precise alignment. Neighboring boxes should have minimal height differences (≤2mm) and gaps (≤2mm) to maintain structural integrity .
• For outdoor installations, fit a rain cover to prevent water ingress and corrosion .

Wiring and Connection

• Open the terminal chamber cover and route cables through explosion-proof cable glands to the terminals .
• Connect live, neutral, and earth wires to their respective terminals, ensuring proper grounding both internally and externally .
• Use a multimeter or continuity tester to verify correct wiring before closing the cover .
• Ensure busbars, zero lines, protective grounding wires, and phase lines are intact, insulated, and neatly arranged .
• Secure terminal screws tightly and label each circuit for identification .
• Avoid overloading the system; adhere to the rated electrical load of the distribution box .

Sealing and Maintenance

• After wiring, close the cover and tighten all fasteners to maintain the explosion-proof seal .
• Protect joint surfaces during maintenance to avoid scratches, and apply anti-rust oil after servicing .
• Regularly inspect the box for damage, corrosion, or loose connections .
• Clean any residual materials inside the box after installation and ensure wiring diagrams are followed for clarity .

Compliance and Standards

• Follow national and international standards such as IEC, NEC, or local safety regulations .
• Ensure all installation steps comply with intrinsic safety principles, preventing sparks or arcs from igniting hazardous atmospheres .
• Only trained professionals should perform installation and maintenance to guarantee safety and certification compliance . By adhering to these procedures, explosion-proof power strips and distribution boxes can be safely installed and maintained, ensuring reliable operation in hazardous environments.