New IEEE Standard - Superseded. Superseded by C37.24-2003. This IEEE Standards product is part of the C37 family on Switchgear, Substations and Protective Relays. This standard applies to all forms of outdoor metal-enclosed switchgear. It covers operating limitations; the effect of ambient temperature, solar radiation, and wind on internal operating temperatures; ventilation and condensation control; enclosure color and finish considerations; current-carrying capabilities of switchgear, and suggested modifications of standard designs.