specifications since NEMA specifications do not give
an insulation thickness for the 133 percent level.
When specifying 28 and 35 kV cables, add the
requirements for not exceeding IEEE STD since this
requirements is necessary as indicated by reference
to the normal industry test values give in the table
below.
15 MINUTE DRY WITHSTAND DC TEST VOLTAGES (kV)
Joints
Cable,
on Extruded
Rates
133 Percent
Dielectric
Voltage
Insulation
Terminations
Cable
------------------------------------------------------
Phase
NEMA
AEIC
to
WC 7
CS5
Phase
WC 8
CS6
IEEE Std 48
IEEE STD 404
-------------------------------------------------------
2.5
25
--
40
--
5.0
25
--
50
25
8.7
35
--
65
35
15
65
--
75
55
25
100
--
105
75
28
--
125
115
85
34.5
--
155
140
100
**************************************************************************
Conductor size shall conform to American Wire Gage (AWG). Conductor sizes
larger than No. 8 AWG shall be stranded. No. 8 AWG and smaller may be
solid or stranded unless otherwise indicated.
2.1.4.2
Low Voltage Wire and Cable
**************************************************************************
NOTE: Type THW insulation can only be obtained in
large quantity. Use of this type insulation is not
recommended for small projects. Wire with "W" in
the type is usually acceptable for wet locations.
**************************************************************************
[UL 854, Type USE, 600 volts shall be used for underground low voltage
power cables.] [UL 83, Type [_____] [THW] [THWN]] [UL 44, Type [XHHW]
[_____] shall be used for secondary series lighting circuits to be
installed in pavement.]
2.1.4.3
Power Cables for Airfield and Heliports
Power cables shall be rated [5] [_____] kV, [133 percent ] [_____]
insulation level, with shield and jacket conforming to [_____] for
[[crosslinked polyethylene] [or] [_____] for ethylene-propylene rubber]
insulated cables.
2.1.4.4
Wire and Cable for Airfield and Heliports
**************************************************************************
NOTE: FAA AC 150/5345-7 covers Type A (rubber),
Type B (ethylene-propylene), and Type C (crosslinked
SECTION 16526A
Page 17
Previous Page
