What is the minimum illumination level for general purpose areas in new construction as suggested by the NEC?

The minimum illumination level for general purpose areas in new construction, as suggested by the National Electrical Code (NEC), is indeed 10 foot-candles (fc). This standard is established to ensure adequate lighting that promotes safety, comfort, and functionality in various types of general use environments.

In practical terms, 10 foot-candles provide a baseline level of illumination that allows individuals to comfortably navigate spaces without strain and supports adequate visibility for tasks typically performed in such areas. This level of lighting is particularly important in spaces where activities may occur throughout different times of the day, ensuring a consistent and safe environment.

The NEC lays down specific guidelines to help ensure that newly constructed buildings promote both safety and usability, and the 10 fc standard effectively balances sufficient light for visibility while avoiding excessive brightness that may lead to discomfort or glare.