NEC Commercial Electrical Practice Test

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Prepare for the NEC Commercial Electrical Test with multiple choice questions each with detailed explanations. Study efficiently to excel in your exam!

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Electrical equipment is prohibited from using what type of plugs in masonry or similar materials?

  1. Plastic plugs

  2. Copper plugs

  3. Wooden plugs

  4. Metallic plugs

The correct answer is: Wooden plugs

Electrical equipment is prohibited from using wooden plugs in masonry or similar materials due to concerns about safety and reliability. Wooden plugs can absorb moisture, which may lead to deterioration and an increased risk of electrical failure or short circuits. Additionally, wood can burn or combust when exposed to high temperatures, posing a fire hazard. In contrast, other types of plugs, such as plastic or metal, are designed to provide greater resistance to moisture, higher durability, and better electrical connectivity, making them more suitable for secure and reliable installations in masonry.

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