Ceiling and floor plenums may be used for supply air in telecommunication equipment areas (as defined in Chapter 14B-2) if they are accessible for cleaning. Such supply plenums shall be limited to one fire area not to exceed 2,500 square feet (232 m
2
). Separations between different plenums shall be made of sheet metal and sealed tight.
(Amend Coun. J. 4-10-19, p. 100029, Art. XII, § 7; Amend Coun. J. 9-14-21, p. 35949, Art. VI, § 1)