Haw. Code R. § 6-77-65 - Vaults: drainage and waterproofing
(a) Each vault must
be designed so as to minimize the entrance of water.
(b) A vault containing gas piping may not be
connected by means of a drain connection to any other underground
structure.
(c) All electrical
equipment in vaults must conform to the applicable requirements of Class 1,
Group D, of the National Electrical Code, ANSI Standard C1.
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