In dwelling unit general lighting load calculations, which areas are not included in the floor area for the calculation?

In dwelling unit general lighting load calculations, which areas are not included in the floor area for the calculation?

• A. Not include open porches or unused spaces not adaptable for future use
• B. Include such spaces
• C. Exclude only porches but include unused spaces
• D. Include all outdoor areas

Answer: (A)

Only finished, occupiable floor areas inside the dwelling are counted when calculating the general lighting load. Open porches and spaces that aren’t adaptable for future use are not part of that floor area. The purpose is to base the load on interior spaces where lighting is regularly used, not on exterior areas or spaces that aren’t intended for occupancy or future adaptation. Therefore, those porches and unused, non-adaptable spaces are excluded, while interior finished spaces like living rooms, bedrooms, kitchens, and hallways are included.

Only finished, occupiable floor areas inside the dwelling are counted when calculating the general lighting load. Open porches and spaces that aren’t adaptable for future use are not part of that floor area. The purpose is to base the load on interior spaces where lighting is regularly used, not on exterior areas or spaces that aren’t intended for occupancy or future adaptation. Therefore, those porches and unused, non-adaptable spaces are excluded, while interior finished spaces like living rooms, bedrooms, kitchens, and hallways are included.