Section Env-Ws 372.25 - Wiring and Control Devices(a) All small community water systems and those NTNC water systems important to public health as specified in Env-Ws 372.02(g) shall comply with this section.(b) All wiring for water system controls and equipment shall be in accordance with the requirements of the version of the National Electrical Code used as the basis for licensing electricians in New Hampshire, as specified in Elec 303.01(a).(c) All electrical devices shall be grounded by a separate and dedicated groundwire.(d) Convenience outlets shall be of the ground fault interrupting type.(e) All junction boxes, relays, and contactors shall be in enclosures.(f) Conduits shall be run no less than 2 feet above the floor. Panels shall be mounted at least 3.5 feet above the floor.(g) All equipment disconnects shall be capable of being locked out during service.(h) Motorized equipment shall have a functional overload protection above and beyond the protection offered by fuses or circuit breakers. Excluded from this requirement shall be items such as fans, chemical feed pumps, mixers, treatment sequence timers, and dehumidifiers.(i) All relays and starters not part of an integrated panel shall be labeled.(j) A detail schematic of the electrical system shall be posted in the enclosure or in an obvious place in the pumphouse, and shall also be part of the operational manual.(k) For all systems, the pump controls shall have a manual "off/on/auto" switch to control pump operations where water is pumped into a vented tank or the equivalent. Where the water is pumped into a pressure system, a pressure relief valve or spring loaded "on" switch shall be provided.(l) Mercury-type float switches shall not be in direct contact with drinking water, and shall, if present, be removed and replaced.N.H. Admin. Code § Env-Ws 372.25
(See Revision Note at chapter heading Env-Ws 300) #6521, eff 6-4-97; ss by #8360, INTERIM, eff 6-4-05, EXPIRES: 12-1-05; ss by #8496, eff 11-30-05