NEC Commercial Electrical Practice Test

What is the horizontal clearance requirement for cord-connected luminaries from the top of a bathtub rim?

1. 2 feet

2. 3 feet

3. 4 feet

4. 5 feet

The correct answer is: 3 feet

The horizontal clearance requirement for cord-connected luminaires from the top of a bathtub rim is established to ensure safety in wet areas. The National Electrical Code (NEC) specifies that a minimum distance of 3 feet is necessary from the edge of the bathtub to any cord-connected luminaire. This distance is crucial to minimize the risk of electrical hazards, such as shock or short-circuits, that can occur when water is present. By maintaining this 3-foot clearance, the code aims to protect individuals from potential dangers and to ensure that electrical installations are done safely. If luminaires were allowed to be closer than this distance, there would be an increased risk, especially in environments where splashing or moisture accumulation is likely, such as bathrooms. Therefore, the correct answer aligns with the NEC standards for electrical safety in residential and commercial installations.