units.
Precast duct banks without the PVC conduits will not be permitted.
]3.1.6
Underground Conduit for Service Feeders Into Buildings
Shall be [PVC, Type EPC-40] [galvanized rigid steel or steel IMC] from the
service equipment to a point 1525 mm 5 feet beyond the building and
projections thereof. Protect the ends of the conduit [by threaded metal
caps or bushings; coat the threads with graphite grease or other coating].
Clean and plug conduit until conductors are installed. [Encase the
underground portion of the conduit in a concrete envelope and bury as
specified for underground duct with concrete encasement.]
[3.1.7
Conduit Protection at Concrete Penetrations
Galvanized conduits which penetrate concrete (slabs, pavement, and walls)
in wet locations shall be PVC coated and shall extend from at least 50 mm 2
inches within the concrete to the first coupling or fitting outside the
concrete (minimum of 150 mm 6 inches from penetration).
]3.1.8
Buried Warning and Identification Tape
Bury tape with the printed side up at a depth of 305 mm 12 inches below the
top surface of earth or the top surface of the subgrade under pavements.
3.1.9
Cable Pulling
[Test existing duct lines with a mandrel and thoroughly swab out to remove
foreign material before pulling cables.] Pull cables down grade with the
feed-in point at the manhole or buildings of the highest elevation. Use
flexible cable feeds to convey cables through manhole opening and into duct
runs. Do not exceed the specified cable bending radii when installing
cable under any conditions, including turnups into switches, transformers,
switchgear, switchboards, and other enclosures. Cable with tape [or wire]
shield shall have a bending radius not less than 12 times the overall
diameter of the completed cable. If basket-grip type cable-pulling devices
are used to pull cable in place, cut off the section of cable under the
grip before splicing and terminating.
3.1.9.1
Cable Lubricants
**************************************************************************
NOTE: Use the first bracketed sentence for
LANTNAVFACENGCOM projects.
**************************************************************************
[Use lubricants that are specifically recommended by the cable manufacturer
for assisting in pulling jacketed cables]. [Cable lubricants shall be
[petroleum grease for lead covered cables] [soapstone, graphite, or talc
for rubber or plastic jacketed cables.] Lubricant shall not be deleterious
to the cable sheath, jacket, or outer coverings.]
3.1.9.2
Cable Pulling Tensions
**************************************************************************
NOTE: Delete the bracketed sentence for
LANTNAVFACENGCOM projects.
**************************************************************************
Tensions shall not exceed the maximum pulling tension recommended by the
SECTION 16302N
Page 29
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