Wis. Admin. Code Public Service Commission § PSC 135.187 - Vaults: sealing, venting, and ventilation addition [49 CFR 192.187]
Current through March 28, 2022
After 49 CFR 192.187(a)(3), insert:
(4w) The outside end of the
ducts shall be equipped with a suitable weatherproof fitting or vent-head
designed to prevent foreign matter from entering or obstructing the duct. The
effective area of the openings in such fittings or vent-heads shall be at least
equal to the cross-sectional area of a 4-inch duct. The horizontal section of
the ducts shall be as short as practical and shall be pitched to prevent the
accumulation of liquids in the line. The number of bends and offsets shall be
reduced to a minimum and provisions shall be incorporated to facilitate the
periodic cleaning of the ducts.
Notes
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