Oklahoma Electrical Practice Exam

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Prepare for the Oklahoma Electrical Exam. Use flashcards and multiple choice questions, each accompanied by explanations and strategies. Be exam-ready!

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How high must a curb surrounding a transformer vault be at minimum?

2 inches
4 inches
6 inches
8 inches

The correct answer is: 4 inches

The minimum height for a curb surrounding a transformer vault is established to ensure safety and compliance with electrical codes. A curb that is at least 4 inches high is designed to help contain any potential spills or leaks from the transformer oil, preventing it from flowing outside the designated area. This is important not only for environmental protection but also for maintaining the integrity of the electrical system and ensuring the safety of personnel working nearby. The 4-inch height is generally seen as a balance between being sufficient to contain potential leaks while not being excessively burdensome in terms of construction or access. This standard height aligns with regulations intended to protect both equipment and personnel, making it a critical requirement in electrical installations.