MIL-DTL-3432J
TABLE VI. Insulation thickness.
Rubber, TPE, and crosslink
Polyethylene
polyethylene
Duty
Conductor
Conductor
Insulation thickness
Insulation thickness
size
size
(in./mm)
(in./mm)
(see table I)
inclusive
inclusive
(AWG and
(AWG and
1/
1/
Nom.
Nom.
Min.
Min.
Kcmil)
Kcmil)
Light
24 to 18
.016(.41)
.013(.33)
25 to I8
.010(.25)
.008(.20)
16 to 14
.018(.46)
.015(.38)
16 to 14
.012(.31)
.010(.25)
12 to 10
.021(.53)
.018(.46)
12 to 10
.015(.38)
.012(.31)
Medium
24 to 20
.030(.76)
.025(.64)
24 to 20
.012(.31)
.010(.25)
18 to 16
.033(.84)
.028(.71)
18 to 16
.014(.36)
.012(.31)
14 to 12
.036(.91)
.031(.79)
14 to 12
.016(.41)
.014(.36)
10 to 8
.038(.97)
.033(.84)
10 to 8
.020(.51)
.016(.41)
6 to 2
.047(1.19)
.042(1.07)
1 to 2/0
.063(1.6)
.056(1.42)
Heavy
24 to 20
.030(.76)
.025(.64)
24 to 16
.015(.38)
.012(.31)
18 to 16
.033(.84)
.028(.71)
14 to 12
.020(.51)
.017(.43)
14 to 10
.047(1.19)
.042(1.07)
10
.030(.76)
.025(.64)
8 to 6
.055(1.4)
.050(1.27)
8 to 4
.035(.89)
.032(.81)
4 to 2
.063(1.6)
.057(1.45)
2
.042(1.07)
.038(.97)
1
.070(1.78)
.063(1.6)
1
.046(1.17)
.041(1.04)
1/0 to 4/0
.078(1.98)
.070(1.78)
1/0 to 2/0
.056(1.42)
.052(1.32)
250 to 500
.094(2.39)
.084(2.13)
3/0 to 4/0
.064(1.63)
.060(1.52)
Kcmil
250 to 500
.075(1.9)
.070(1.78)
Kcmil
1/ Nominal dimensions are included for information only.
3.2.6.2 Uninsulated ground drain wires. When specified (see 1.2.1.5.4), uninsulated ground drain wires shall be
included in two, three, four, and five conductor, heavy duty unshielded cables in which all conductors are of the same
size, and shall be cabled together with the conductors and fillers, if used. The number of uninsulated ground drain
wires shall be the same as the number of conductors. The minimum size of the uninsulated ground drain wires shall
be as specified in table VII and is dependent upon the size and number of conductors. Uninsulated ground drain
wires shall not be furnished in conductor sizes less than 8 AWG.
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