StacksVerified U.S. regulatory reference

49 CFR §192.189

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Each vault must be designed so as to minimize the entrance of water.
  2. (b)A vault containing gas piping may not be connected by means of a drain connection to any other underground structure.
  3. (c)Electrical equipment in vaults must conform to the applicable requirements of Class 1, Group D, of the National Electrical Code, NFPA-70 (incorporated by reference, see § 192.7).