NEC Commercial Electrical Practice Test

What type of enclosure is required for receptacles installed outdoors in a wet location?

1. Weatherproof

2. Water-resistant

3. Moisture-proof

4. Standard

The correct answer is: Weatherproof

For receptacles installed outdoors in a wet location, a weatherproof enclosure is required. Weatherproof enclosures are specifically designed to protect electrical components from moisture, rain, and other environmental factors that are commonly encountered outdoors. The enclosure prevents water from entering and potentially causing shorts or corrosion, which could lead to electrical failure or pose safety hazards. In accordance with the National Electrical Code (NEC), weatherproof covers are essential for any outdoor electrical equipment situated in areas where it may be exposed to wet conditions. This requirement underscores the importance of proper installation practices to ensure safety and functionality in outdoor environments. The other types of enclosures mentioned—water-resistant, moisture-proof, and standard—do not meet the stringent criteria needed for outdoor installations in wet locations. Water-resistant enclosures may be suitable for areas where only light moisture is encountered but do not provide the same level of protection as weatherproof ones. Similarly, moisture-proof enclosures are typically used in environments where humidity is high but not necessarily exposed to direct water. Standard enclosures lack the protective features needed for outdoor use and are not suitable for any applications where direct exposure to water could occur.