Intrinsic safety is a barrier designed to do what in hazardous areas?

Intrinsic safety is a barrier designed to do what in hazardous areas?

• A. A barrier preventing excess voltage or current from reaching in hazardous area.
• B. A device that stores energy for later use.
• C. A system that isolates equipment from ground.
• D. A circuit that reduces noise and interference.

Answer: (A)

Intrinsic safety is about keeping the energy that reaches equipment in a hazardous area at levels too low to ignite the atmosphere. The barrier accomplishes this by preventing excess voltage or current from reaching into the hazardous area, and by limiting stored energy as well. Storing energy, isolating from ground, or reducing noise are not the functions of an intrinsic safety barrier, so they don’t fit the purpose of preventing ignition in hazardous environments.

Intrinsic safety is about keeping the energy that reaches equipment in a hazardous area at levels too low to ignite the atmosphere. The barrier accomplishes this by preventing excess voltage or current from reaching into the hazardous area, and by limiting stored energy as well. Storing energy, isolating from ground, or reducing noise are not the functions of an intrinsic safety barrier, so they don’t fit the purpose of preventing ignition in hazardous environments.