3.2.2.5
Surface Markers
Markers shall be located near the ends of cable runs, at each cable joint
or splice, at approximately every 150 m 500 feet along cable runs, and at
changes in direction of cable runs. Markers shall be constructed as
indicated.
3.2.3
Connection to Buildings
Cables shall be extended into the various buildings as indicated, and shall
be properly connected to the first applicable termination point in each
building. Interfacing with building interior conduit systems shall be at
conduit stubouts terminating 1.5 m 5 feet outside of a building and 600 m 2
feet below finished grade as specified and provided under Section 16402
INTERIOR DISTRIBUTION SYSTEM. After installation of cables, conduits shall
be sealed with caulking compound to prevent entrance of moisture or gases
into buildings.
3.3
MEDIUM-VOLTAGE CABLES
Medium-voltage cables shall be suitable for a rated circuit voltage of [5
kV] [15 kV] [25 kV] [28 kV] [35 kV]. Other parts of the cable system such
as joints and terminations shall have ratings not less than the rating of
the cables on which they are installed. Separate insulated connectors
shall have nominal voltage ratings coordinated to associated apparatus
ratings rather than cable ratings when used to connect cable to apparatus.
Cables shall be provided with [100] [133] percent insulation level [and 28
kV and 35 kV insulation thicknesses shall be in accordance with either AEIC
CS8 or AEIC CS6 as applicable]. Neutral conductors of grounded neutral
systems shall be of the same insulation material as phase conductors,
except that a 600-volt insulation rating is acceptable.
3.3.1
Cable Joints
Shields shall be applied as required to continue the shielding system
through each entire cable joint. Shields may be integrally molded parts of
preformed joints. Shields shall be grounded at each joint.
3.3.1.1
Types
Separable insulated connectors of suitable construction or standard splice
kits shall be used for single-conductor and two-conductor cables. The
connectors shall be of FAA AC 150/5345-26 [factory preformed] [resin
pressure-filled] [_____] type. Cables joints for which acceptable
separable connector kits are not available may use [factory preformed]
[vulcanized] [taped joint] [resin pressure-filled overcast taped] [_____]
splices if approved.
3.3.1.2
Requirements
Cable joints shall provide insulation and jacket equivalent to that of the
associated cable. Lead sleeves shall be provided for lead-covered cables.
Armored cable joints shall be enclosed in compound-filled, cast-iron or
alloy, splice boxes equipped with stuffing boxes and armor clamps of a
suitable type and size for the cable being installed.
3.3.2
Terminations
Terminations shall be IEEE Std 48, Class 1 or Class 2; of the molded
SECTION 16525A
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