apparatus is provided with suitable bushings. Terminations shall be of the
outdoor type, except that where installed inside outdoor equipment housings
which are sealed against normal infiltration of moisture and outside air,
indoor, Class 2 terminations are acceptable. Class 3 terminations are not
acceptable. Terminations, where required, shall be provided with mounting
brackets suitable for the intended installation and with grounding
provisions for the cable shielding, metallic sheath, and armor.
3.3.2.1
Factory Preformed Type
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NOTE: In areas where heavy fog, salt air, or medium
to heavy industrial contamination occur, require
that terminations pass the next higher wet withstand
test for factory preformed terminations. For taped
termination, use 318 mm (12-1/2 inches) for cable
rated 5 kV, 508 mm (20 inches) for cable rated 15
kV, 635 mm (25 inches) for cable rated 25 kV, and
889 mm (35 inches) for cable rated 28 kV or 35 kV in
normal atmospheres. Use next higher voltage level
lengths in contaminated atmospheres which will
require 1.2 meters (46 inches) for 28 kV or 35 kV
cables.
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Molded elastomer, wet-process porcelain, prestretched, and heat-shrinkable
terminations shall utilize factory preformed components to the maximum
extent practicable rather than tape build-up. Terminations shall have
basic impulse levels as required for the system voltage level. Leakage
distances shall pass the wet withstand voltage test required by IEEE Std 48
for the next higher BIL level.
3.3.2.2
Taped Terminations
Taped terminations shall use standard termination kits providing suitable
terminal connectors, field-fabricated stress cones, and rain hoods.
Terminations shall be at least [318] [508] [635] [889] [1200] mm [12-1/2]
[20] [25] [35] [46] inches long from the end of the tapered cable jacket to
the start of the terminal connector, or not less than the kit
manufacturer's recommendations, whichever is greater.
3.4
LOW-VOLTAGE CABLES
Cable shall be rated 600 volts, except that secondaries of isolation
transformer to in-pavement lights installed in pavement saw kerf and 48
volt DC control cables may be 300 volts. Other parts of cable systems such
as splices and terminations shall be rated at not less than 600 volts.
Splices in wires No. 10 AWG and smaller shall be made with an insulated,
solderless, pressure type connector, conforming to the applicable
requirements of UL 486A-486B. Splices in wires No. 8 AWG single conductor
cable shall be made with [FAA AC 150/5345-26 Type L-823 connectors]
[noninsulated, solderless, pressure type connector, conforming to the
applicable requirements of UL 486A-486B. They shall then be covered with
an insulation and jacket material equivalent to the conductor insulation
and jacket.] Splices below grade or in wet locations shall be sealed type
conforming to ANSI C119.1 or shall be waterproofed by a sealant-filled,
thick wall, heat shrinkable, thermosetting tubing or by pouring a
thermosetting resin into a mold that surrounds the joined conductors.
SECTION 16526A
Page 33
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