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 D-C TEST VOLTAGE
A-C TEST VOLTAGE
INSULATION THICKNESS
Rated Circuit
Voltage, Phase
100 Percent
100 Percent
233 Percent
233 Percent
133 Percent
100 Percent
to Phase, Volts
Conductor
Insulation Level
Insulation Level
Insulation Level
Insulation Level
Insulation Level
Insulatation Level
Size AWG or
MCM*
kV
kV
kV
kV
mils
mm
mils
mm
12.0
12.0
4.0
4.0
30
14-9
30
0.76
0.76
0-600
16.5
16.5
45
5.5
5.5
8-2
45
1.14
1.14
21.0
21.0
7.0
7.0
55
55
1.40
1.40
1-4/0
24.0
24.0
8.0
8.0
225-500
65
1.65
65
1.65
30.0
30.0
10.0
10.0
80
500-1000
80
2.03
2.03
* MCM-Thousands of circular mils.
133 Percent Level - This insulation level corresponds to that formerly designated for
100 percent level - Cables in this category may be applied where
the system is provided with relay protection such that ground faults
ungrounded systems. Cables in this category may be applied in situations where the clearing
will be cleared as rapidly as possible, but in any cause within 1
time requirements of the 100 percent level category cannot be met, and yet there is adequate
assurance that the faulted section will be de-energized in a time not exceeding 1 hour. Also
minute. While these cables are applicable to the great majority of
cable installations which are on grounded systems, they may be used
they may be used when additional insulation strength over the 100 percent level category is
also on other systems for which the application of cables is
desirable.
acceptable provided the above clearing requirements are met in
completely de-energizing the faulted section.
CABLE RATED O-600V
OZONE-RESISTANT EHYLENE-PROPYLENE RUBBER
INSULATION
(IPCEA S-68-51G, NEMA WC 8-1971).
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