NEMA Type 3 enclosure provides protection against windblown dust.

• A. Type 1
• B. Type 3
• C. Type 3R
• D. Type 4

Answer: (B)

NEMA Type 3 enclosures are designed for outdoor use and provide a level of protection against solid ingress caused by windblown dust, as well as protection from rain, sleet, and similar weather conditions. This makes them suitable for outdoor environments where dust can be carried by the wind, while still allowing the enclosure to withstand weather exposure.

Other enclosure types are tailored for different settings: some are intended for indoor use or offer different weather protections (such as rainproof or corrosion-resistant variants). The key point is that windblown dust protection for outdoor use is a defining feature of the Type 3 classification.