(d) Illumination. Illumination shall be provided for all working
spaces about service equipment, switchboards, panelboards, or motor
control centers installed indoors. Additional lighting outlets shall not
be required where the work space is illuminated by an adjacent light
source or as permitted by 2.10.3.21(a)(1), Exception No. 1, for
switched receptacles. In electrical equipment rooms, the illumination
shall not be controlled by automatic means only.
(e) Headroom. The minimum headroom of working spaces about
service equipment, switchboards, panelboards, or motor control
centers shall be 2 000 mm. Where the electrical equipment exceeds
2 000 m in height, the minimum headroom shall not be less than the
height of the equipment.