Unless identified for use in the operating environment, no conductors or equipment shall be in damp or wet locations. having a deteriorating effect on the conductors or equipment.
Structural dampness is the presence of unwanted moisture within the structure of a building as a result of intrusion from the outside or condensation within the structure.
Many damp problems in buildings are caused by environmental factors such as condensation and rain infiltration[1]. Capillary infiltration of liquids from the ground into concrete or masonry is called "moisture rise" and is determined by the geometry and porosity of the building material where this evaporation-limited capillary infiltration occurs.
Damp in buildings is exacerbated by high humidity levels, regardless of the mechanism by which it occurs.
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