Mike Dolt Enterprises
Mike Dolt Enterprises
User: DesignTech, Location: Denver, CO
Asked on: Thursday, March 17, 2011 at 10:34 am EDT
Answered on: Tuesday, May 14, 2024 at 2:56 am EDT
Question: Can anyone point me in the right direction? I am looking for a power switch for use with a 24 Vdc controller in a class 1 Div 2 environment. I have a controller that needs to have a power switch on it but I am in a Class 1 Div 2 location; any suggestion on the best way to approach this problem? I have had minimal luck searching for power switchs rated for this type of application.
Options for Power Switches in Class 1 Div 2 Environments
1. Explosion-Proof Switches
Designed specifically for hazardous locations classified as Class 1 Div 2. Encapsulated in a sealed enclosure that prevents ignition of surrounding flammable gases or vapors. Meet the requirements of NEC Article 501.
2. Intrinsically Safe Switches
Designed to operate within safe parameters in hazardous environments without creating a spark or excessive heat. Circuits are limited both in voltage and current to prevent ignition. Meet the requirements of NEC Article 504.
3. Certified Intrinsically Safe Barriers
Isolating devices that allow non-intrinsically safe signals to interact with intrinsically safe systems. Provide a power switch function while maintaining intrinsic safety. Meet the requirements of NEC Article 504.
Manufacturers and Products
Eaton Crouse-Hinds
Explosion-proof and intrinsically safe switches
Hubbell Wiring
Intrinsically safe barriers and switches
Pepperl+Fuchs
Explosion-proof and intrinsically safe switches
Allen-Bradley (Rockwell Automation)
Intrinsically safe barriers and switches
Considerations
Enclosure Rating
Ensure the enclosure rating of the switch is suitable for the specific Class 1 Div 2 environment.
Ingress Protection
Choose a switch with an appropriate IP rating to protect against moisture and dust.
Switch Type
Consider the type of switch required (e.g., toggle, pushbutton, rotary).
System Compatibility
Verify the switch is compatible with the 24 Vdc controller.
Certifications and Approvals
Ensure the switch meets the necessary standards and certifications for your application.
Note: It's recommended to consult with a qualified electrician or engineer to determine the most appropriate solution for your specific requirements. Flag for review