**Electrical Installation Points in Explosive Atmospheres**
When installing electrical equipment in explosive atmospheres, strict adherence to relevant standards is essential. According to GB50058-92 *"Design Code for Electrical Installations in Explosive and Fire Hazardous Areas"*, GB50257-96 *"Code for Construction and Acceptance of Electrical Installations in Explosive and Fire Hazardous Locations"*, CD90B-85 *"General Drawing for Wiring and Electrical Installation in Explosive Hazardous Locations"*, and IEC 79-14:1996 *"Explosive Gas Environments – Part 14: Electrical Installations (Excluding Coal Mines)"*, special precautions must be taken to ensure safety.
Before applying these specific requirements, the general electrical installation specifications must first be met. For instance, while black plastic tape is commonly used as an insulating material in regular installations, it is strictly prohibited in hazardous areas. Instead, self-adhesive tapes or approved insulation materials should be used. Additionally, electrical installations in such areas should minimize the use of electrical devices, avoid proximity to release sources, and be protected from heat, moisture, and vibration caused by nearby piping.
**Maintenance Points for Explosion-Proof Cameras**
To maintain the integrity and explosion-proof performance of cameras, only trained personnel with proper certification should perform inspections and maintenance. Unauthorized modifications or improper handling can compromise safety.
1. The cable entry points of explosion-proof cameras must be sealed using rubber seals. Substituting them with sealants, asbestos rope, or filling materials is strictly prohibited. No substances should be added inside the housing, as this could destroy the explosion-proof function. The sealing ring and its corresponding compression nut must remain intact for easy connection. Multiple single-strand wires should not be combined and inserted through a single-hole sealing ring. Regular cleaning of the rubber seal is necessary to prevent aging and deterioration.
2. Any unauthorized modification of the camera’s internal components or structure is forbidden. Fastening bolts must not be replaced or missing, and all gaskets (both elastic and metal) on unused ports should remain in place. The compression nut should be tightened properly to ensure a secure seal.
3. Live electrical equipment and cables must never be carried into explosive areas. Power should not be switched on or off during maintenance. A warning sign stating "Do Not Close – Someone Working" should be placed at the site. If the camera is disassembled for inspection, the power cable ends should be properly isolated and not reconnected until the work is complete.
4. During daily operations and maintenance, the camera housing should be opened only when necessary, and the power must be turned off first. If the enclosure is opened, the explosion-proof surface should be carefully protected and not allowed to touch the ground. After cleaning, apply phosphatizing paste or anti-rust oil (such as 204) to maintain its protective properties.
5. All explosion-proof cameras must have detailed equipment records, including installation, testing, operation, repair, and decommissioning data. Technical documents from different periods should be systematically collected, stored, and labeled on the device for future reference.
This article was published by Turnos Technology!
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