2.5.4
Terminations
Terminations shall be in accordance with IEEE Std 48, Class 1 or Class 2;
of the molded elastomer, wet-process porcelain, prestretched elastomer,
heat-shrinkable elastomer, or taped type. Acceptable elastomers are
track-resistant silicone rubber or track-resistant ethylene propylene
compounds, such as ethylene propylene rubber or ethylene propylene diene
monomer. Separable insulated connectors may be used for apparatus
terminations, when such 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.
2.5.4.1
Factory Preformed Type
**************************************************************************
NOTE: Specify IEEE Std 48 test in areas of heavy
fog, salt air, or industrial contamination. Specify
track resistant tape in high humidity areas with
dust and industrial contaminants.
**************************************************************************
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 comply with wet withstand voltage test requirements of IEEE
Std 48 for the next higher Basic Insulation Level (BIL) level.]
[Anti-tracking tape shall be applied over exposed insulation of preformed
molded elastomer terminations].
2.5.4.2
Taped Terminations
**************************************************************************
NOTE: Normally, specify 317.5 mm (12-1/2 in.) for 5
kV cable, 508.0 mm (20 in.) for 15 kV cable, 635.0
mm (25 in.) for 25 kV cable, and 889.0 mm (35 in.)
for 28 kV or 35 kV cable. In contaminated areas,
specify next higher voltage level lengths, and
1168.4 mm (46 inches) for 28 kV or 35 kV cables.
**************************************************************************
Taped terminations shall use standard termination kits providing terminal
connectors, field-fabricated stress cones, and rain hoods. Terminations
shall be at least [315][510][635][890][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.
2.6
CONDUIT AND DUCTS
**************************************************************************
NOTE: Specify thin-wall for encased burial and
thick-wall for direct burial. Communication lines
SECTION 16375A
Page 24
Previous Page
