MIL-DTL-27500H
1.2.1.4 Number of wires per cable. The number of wires per cable will be as designated and will be 1 to 15 for shielded or
shielded and jacketed cables, and 2 to 15 for unshielded unjacketed or unshielded jacketed cables. Cables with 10 to 15 conductors
will be limited to conductor size 12 and smaller.
1.2.1.5 Shield style and material. The shield style and material of the overall shields will be designated by a single letter in
accordance with table IA.
TABLE I A Shield Material
Symbol single
Symbol double
Shield Material
Maximum temperature
shield style
shield style
limit for shield material
(information only)
U
---
No shield
---
T
V
Tin-coated copper, round
150°C (302°F)
S
W
Silver-coated copper, round
200°C (392°F)
N
Y
Nickel-coated copper, round
260°C (500°F)
F
Z
Stainless Steel, round
400°C (752°F)
C
R
Heavy Nickel coated copper, round
400°C (752°F)
M
K
Silver-coated high strength copper alloy, round
200°C (392°F)
P
L
Nickel-coated high strength copper alloy, round
260°C (500°F)
G
A
Silver-coated copper, flat
200°C (392°F)
H
B
Silver-coated high strength copper alloy, flat
200°C (392°F)
260°C (500°F)
*
#
Nickel-coated copper, flat
J
D
Tin-coated copper, flat
150°C (302°F)
E
X
Nickel-coated high strength copper alloy, flat
260°C (500°F)
I
Q
Nickel-chromium alloy, flat
400°C (752°F)
1.2.1.6 Jacket material and temperature rating. The single jacket symbol will be used for cables with an outer jacket only. The
double jacket symbol will be used in conjunction with a double shield symbol to describe constructions with a jacket in between two
shields with another jacket over the outer shield. The single jacket symbol will be used in conjunction with the double shield symbol
to describe constructions with two overlaid shields with a single outer jacket. Unless otherwise specified, (see 3.10 and 6.2.1h ),
jacket colors will be as specified under the jacket materials in accordance with Table I B.
3
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