What rating and type must the explosion-proof receptacles meet for this job?

The correct choice of a 20 A, 125 V duplex explosion-proof receptacle aligns with standard practices used in locations where hazardous materials could be present. This receptacle is designed to safely house electrical connections in environments that may contain flammable gases or vapors, ensuring that any potential ignition sources are effectively contained.

The rating of 20 A and voltage of 125 V is appropriate for a wide range of standard power supplies typically used in industrial and commercial settings, providing a balance of safety and functionality. A duplex style receptacle allows for two devices to be plugged in simultaneously, which is often necessary in work areas where multiple tools or equipment might be needed.

In contrast, other options either specify inappropriate amperage or voltage ratings for standard explosive environments. For example, a 30 A, 240 V single receptacle may not be suitable because it implies a higher voltage and amperage that is not common for typical explosive-proof applications. Similarly, a 20 A, 480 V triplex receptacle is excessive for general use and less versatile compared to duplex options.

Selecting the correct rating and type ensures compliance with safety codes and provides reliable power distribution in potentially hazardous locations. It emphasizes the importance of understanding electrical specifications that match the environment in which they