What are typical requirements for outdoor luminaires?

• A. They must be weatherproof, properly mounted, and protected against moisture and corrosion.
• B. They can use indoor-rated components.
• C. They require no weatherproofing if under roof.
• D. They should be decorative only.

Answer: (A)

Outdoor luminaires must be built to withstand the elements. The typical requirements are weatherproof construction, proper mounting, and protection against moisture and corrosion. Weatherproofing prevents water and humidity from entering the electrical enclosure, which protects safety and reliability. Proper mounting keeps the fixture secure against wind and physical stress, and protects wiring from damage. Components must be suited for outdoor exposure—indoor-rated parts, or fixtures that rely on only decorative use, don’t provide the necessary protection and would fail in wet or corrosive conditions.