| http://www.w3.org/ns/prov#value | - Cable installed in an existing duct shall be considered a concurrent installation. (See Rules 41.4-B and 43.3-B) (3) From Foreign Substructures. (Except Communication Systems) (a) Independently installed: Supply cables, when independently installed, shall be separated where practicable, from gas, water, oil, or other pipe systems, or other foreign substructures, by a clearance of a least 12 inches
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