MIL-DTL-27072E
TABLE II. Basic wire specification designator.
Basic wire
Basic
wire specification
specification designator
1/
A
1/
B
2/
D
or NEMA-HP3
2/
E
or NEMA-HP3
1/
P
1/ PVC shall not be used in aerospace applications.
2/ See specification sheet for basic wire.
3.3.1.1 Basic wire gauge and stranding. The basic wires shall conform to the size and stranding
specified in table III.
TABLE III. Basic wire size and stranding designator.
Size and Conductor Number Strand Size and Conductor Number
Strand
stranding
Size
of
size
stranding
size
of
size
designator
AWG
strands AWG designator
AWG
strands
AWG
D
12
19
25
K
20
7
28
F
16
19
29
L
22
19
34
1/
M
G
18
19
30
22
7
30
1/
1/, 2/
H
S
18
7
26
26
7
34
J
20
19
32
-
-
-
-
1/ Inactive for new design stranding.
2/ Inactive for new design wire size.
3.3.1.2 Basic wire identification coding. Unless otherwise specified in individual specification sheets,
the individual wires shall be coded for their entire length in accordance with MIL-STD-686. The standard
means of coding shall be solid-colored insulation (see 3.3.1.3), with colored stripe tracer (see 3.3.1.4).
3.3.1.3 Solid-colored insulation. Cables having six wires or less shall employ solid coloring and each
wire shall be clearly distinguishable. The entire thickness of the insulation shall be solid-colored.
3.3.1.4 Helical stripe tracer. Cables having more than six wires shall employ solid coloring in the first
six wires and shall utilize a colored helical stripe tracer on the seventh wire and above. Where extruded
polyamide jackets are used over the primary insulation, the helical stripe tracer may be applied to the
underlying insulation or to the surface of the polyamide jacket.
3.3.1.4.1 Ink. The colored helical stripe shall be obtained by using nonconductive, permanent inks
having pigments or dyes that are least affected by light, by plasticizers incorporated in the insulation, and
by the temperature allowed by the basic wire. The medium used shall provide good anchorage to the
insulation.
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