Q. What is the Code requirement for illumination of attics and under-floor spaces in dwelling units?

A. At least one lighting outlet that contains a switch or is controlled by a wall switch must be installed in attics, under-floor spaces, utility rooms, and basements used for storage or containing equipment that requires servicing. The switch must be located at the usual point of entry to these spaces, and the lighting outlet must be located at or near the equipment that requires servicing [210.70(A)(3)].