[Insulate cable shield for 34.5 kV system splices into sections at each
splice to prevent circulating currents in the shield. Ground each
insulated section at one point only] [Ground ends of insulated sections
terminating in potheads at the pothead terminal only]. Provide a bare
copper ground connection brought out in a watertight manner and grounded to
a ground rod as part of the splice installation. Ground conductors,
connections, and rods shall be as specified elsewhere in this section.
Wire shall be trained to the sides of the enclosure to prevent interference
with the working area.
[3.1.12.2
Lead-Sheathed Cable Joints
Prepare for jointing by cutting the lead sheath back the required distance
and belling the remaining cable sheath to prevent damage to the conductor
insulation. Clean insulated conductors and tape and cut insulation to
expose bare wires for the required distance. Clean conductor thoroughly,
then join by a split or slotted tinned copper connector or other approved
connector. Solder conductors and connector and wrap joint with compatible
semiconducting tape and insulating tape as recommended by the manufacturer
so that insulation will be at least equal to the rated insulation of the
cable. [For cable over 7500 volts operating voltage, provide cable shield
splice.] Center the lead sleeve over the prepared joint, and [boil out the
area with hot insulating oil,] [fill with an insulating oil] [fill with an
insulating compound] and solder seal. [Alternately use a
factory-engineered heat shrinkable joint kit to complete the splice. Heat
shrinkable joint kit shall contain necessary materials except connector to
provide oil stop and oil seal, electrical stress, control, insulation,
shielding and environmental sealing. Kit shall allow for external
grounding.]
]3.1.13
Cable End Caps
Cable ends shall be sealed at all times with coated heat shrinkable end
caps. Cables ends shall be sealed when the cable is delivered to the job
site, while the cable is stored and during installation of the cable. The
caps shall remain in place until the cable is spliced or terminated.
Sealing compounds and tape are not acceptable substitutes for heat
shrinkable end caps. Cable which is not sealed in the specified manner at
all times will be rejected.
[3.1.14
Live End Caps
Provide live end caps for single conductor medium voltage cables where
indicated.
]3.1.15
Fireproofing of Cables in Manholes, Handholes and Vaults
Fireproof (arc proof) wire and cables which will carry current at 2200
volts or more in manholes, handholes, and vaults.
3.1.15.1
Fireproofing Tape
Tightly wrap strips of fireproofing tape around each cable spirally in
half-laped wrapping. Install tape in accordance with manufacturer's
instructions.
[3.1.15.2
Tape-Wrap
Tape-wrap lead-sheathed or other metallic-sheathed or metallic armored
SECTION 16302N
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