**Electrical Installation Points in Explosive Atmospheres**
When installing electrical equipment in explosive atmospheres, it is essential to follow specific guidelines to ensure safety and compliance. These installations should be based on the principles outlined in 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 Drawings for Wiring and Electrical Installation in Explosive Hazardous Locations," and IEC79-14:1996, which covers electrical equipment for explosive gas environments.
Before applying specialized requirements, all electrical installations must first meet general electrical installation standards. For example, while black plastic cloth is commonly used as an insulating material in regular installations, it is not suitable for hazardous areas. Instead, self-adhesive tape should be used for insulation. Additionally, in hazardous locations, the use of electrical devices should be minimized, and installation positions should avoid sources of gas release, as well as the effects of heat, moisture, and vibration from process piping.
**Maintenance Points for Explosion-Proof Cameras**
To maintain the integrity and explosion-proof performance of cameras, only trained and certified personnel should perform inspections and maintenance. Unauthorized modifications or improper handling can compromise the safety of the equipment.
1. The entry point of the explosion-proof camera must be sealed with a rubber gasket. It is strictly prohibited to replace this with sealant or asbestos rope, and no substances should be filled inside the cavity. The sealing ring and its corresponding compression nut must not be removed for convenience. Also, multiple single-stranded wires should not be merged and inserted through a single-hole elastic sealing ring. The rubber gasket should be cleaned regularly to prevent aging and deterioration.
2. Any accidental modification of the camera’s structure, internal components, or wiring is strictly forbidden. Fastening bolts must not be replaced or missing. All extra inlet and outlet ports should remain sealed with factory-installed elastic and metal gaskets, and the compression nuts should be tightened properly to ensure a secure seal.
3. Live electrical equipment and cables must not be carried into explosive hazardous areas. Power should never be switched on or off during maintenance. A warning sign “Do Not Close – Work in Progress†should be displayed when the equipment is disconnected. If the camera needs to be disassembled and moved to a safe area, the power cable at the site must be properly handled and kept de-energized.
4. During daily operations and maintenance, the explosion-proof housing should be avoided from being opened unless necessary. Before opening, the power must be turned off. If the housing is opened, the explosion-proof surface must be protected and not damaged. The surface should be placed face up and not directly on the ground. After cleaning, apply phosphating paste or 204 anti-rust oil to protect the surface.
5. All explosion-proof cameras must have detailed equipment files that include installation records, testing data, operation logs, repair history, and decommissioning details. Technical data from different periods should be collected, archived, and labeled on the device for easy reference.
This article is published by Turnos Technology!
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