NEC Commercial Electrical Practice Test

How many receptacle outlets are required in a dwelling unit?

1. One at each corner

2. A minimum of two per room

3. Based on the square footage of the unit

4. No minimum requirement

The correct answer is: Based on the square footage of the unit

The requirement for the number of receptacle outlets in a dwelling unit indeed considers the square footage of the unit. According to the National Electrical Code (NEC), the minimum number of receptacle outlets is determined by the area of the rooms. The NEC specifies that for general-purpose receptacle outlets in dwelling units, there must be at least one outlet for every 12 feet of wall space, excluding openings such as doors or windows. This requirement ensures that sufficient power access is available throughout the unit, reducing the risk of overloading circuits and promoting safety and convenience for everyday use. This standard illustrates the necessity for a structured approach to electrical outlet installation, which can vary based on the specific dimensions of the dwelling. Other considerations, like room functions and layouts, can further affect the overall number needed, but the foundational guideline based on square footage is a key element.