This rule incorporates by reference the National Fire Protection Association Standard #496, Standard for Purged and Pressurized Enclosures for Electrical Equipment, 2008 edition. All rights reserved by the National Fire Protection Association. Copies of this standard are available through the National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269.
16- 219 C.M.R. ch. 23, § 1