Table D. - Cable d-c test voltage guide
Part 1
Rubber and rubber-like insulated cable up to 28 kV
IPCEA Std. S-19-81, Fifth Edition, June 1976
Maximum
rated
circuit
voltage
(kV)
Conductor
size
(AWG or -
kcmil)
Conductor
insulation
thickness Mils
mm
Insulation grade
Other than
ozone-resisting Ozone-resisting
d-c/a-c ratio = 3.0 d-c/a-c ratio = 3.0
ozone-resisting Ozone-resisting
d-c/a-c ratio = 3.0 d-c/a-c ratio = 3.0
Maximum conductor to ground d-c test
values in kV*
values in kV*
Grounded
neutral
service
Ungrounded
neutral
service
service
Grounded
neutral
service
Grounded
neutral
service
0.6
1.0
2.0
5.0
8.0
15.0
25.0
28.0
28.0
18-16
14-9
8-2
1-4/0
225-500
525-1000
1000+
14-8
7-2
1-4/0
225-500
525-1000
1000+
14-8
7-2
1-4/0
225-500
500+
8-4/0
8-4/0
225-1000
1000+
6 and over
6 and over
2 and over
1 and over
1 and over
1 and over
6 and over
2 and over
1 and over
1 and over
1 and over
30 0.76
45 1.14
60 1.52
80 2.03
95 2.41
110 2.79
125 3.18
60 1.52
80 2.03
95 2.41
110 2.79
125 3.18
140 3.56
80 2.03
95 2.41
110 2.79
125 3.18
140 3.56
155 3.94
170 4.32
190 4.83
190 4.83
250 6.35
295 7.49
420 10.67
455 11.56
500 12.70
45 1.14
60 1.52
80 2.03
95 2.41
110 2.79
125 3.18
60 1.52
80 2.03
95 2.41
110 2.79
125 3.18
140 3.56
80 2.03
95 2.41
110 2.79
125 3.18
140 3.56
155 3.94
170 4.32
190 4.83
190 4.83
250 6.35
295 7.49
420 10.67
455 11.56
500 12.70
-
5.4
6.3
7.2
9.0
6.3
7.2
9.0
10.8
12.6
12.6
9.0
10.8
13.5
16.2
18.0
19.8
10.8
13.5
16.2
18.0
18.0
13.5
16.2
18.0
19.8
10.8
13.5
16.2
18.0
18.0
21.0**
21.0**
21.0**
21.0**
21.0**
-
-
-
-
-
-
-
-
-
-
-
-
5.4
6.3
7.2
9.0
6.3
7.2
9.0
10.8
12.6
12.6
9.0
10.8
13.5
16.2
18.0
19.8
10.8
13.5
16.2
18.0
18.0
13.5
16.2
18.0
19.8
10.8
13.5
16.2
18.0
18.0
21.0**
21.0**
21.0**
21.0**
21.0**
-
-
-
-
-
-
-
-
-
-
-
-
8.1
10.8
13.5
15.3
18.0
20.7
10.8
13.5
15.3
18.0
20.7
20.7
13.5
15.3
18.0
20.7
20.7
13.5
15.3
18.0
20.7
10.8
13.5
15.3
18.0
20.7
20.7
13.5
15.3
18.0
20.7
20.7
21.0**
21.0**
21.0**
21.0**
21.0**
27.0
-
42.0
-
60.0
63.0
63.0
-
8.1
10.8
13.5
15.3
18.0
20.7
10.8
13.5
15.3
18.0
20.7
20.7
13.5
15.3
18.0
20.7
20.7
13.5
15.3
18.0
20.7
10.8
13.5
15.3
18.0
20.7
20.7
13.5
15.3
18.0
20.7
20.7
21.0**
21.0**
21.0**
21.0**
21.0**
-
27.0
-
48.0
-
-
-
* All test values rounded off to 1 decimal place, and voltages are 60 percent
of factory test.
** Not applicable to shielded cables, armored cables are 80 percent test
value and metallic sheathed cables are 90 percent test value.
of factory test.
** Not applicable to shielded cables, armored cables are 80 percent test
value and metallic sheathed cables are 90 percent test value.
31