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All MIL-DTL-27500 cables are designated by a combination of digits and letters (not to exceed 16) which indicates
the exact construction of each cable. Please note the following example of a MIL-DTL-27500 cable.
| Cable Description: |
M27500 |
A |
22 |
SB |
3 |
T |
23 |
|
(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
Classification: The cable will be of the following types and will be furnished in the basic wire size, type, number
of wires, and shield and jacket styles, as specified.
- Unjacketed: 2 to 15 color coded wires, spirally laid without an overall outer jacket.
- Jacketed: 2 to 15 color coded wires, spirally laid with an overall outer jacket.
- Shielded: A single wire, or 2 to 15 color coded wires spirally laid, with one or two overall shields.
- Shielded and Jacketed: A single wire, or 2 to 15 color coded
wires spirally laid, with one or two shields and one or two jackets.
Specification Number (1): All cables will carry this prefix.
Identification Method (2):
When 85% minimum shield coverage is required:
"-" designates the preferred identification method (white wire with colored stripes) using Table IIIA;
"F" designates the preferred identification method (white wire with colored stripes) using Table IIIB;
"A" designates optional identification method A (solid colored wires) using Table IIIA;
"G" designates optional identification method A (solid colored wires) using Table IIIB;
"B" designates optional identification method B using Table IIIC;
"K" designates optional identification method C;
"L" designates optional identification method D (see mil spec for band marking specification).
When 90% minimum shield coverage is required:
"C" designates the preferred identification method (white wire with colored stripes) using Table IIIA;
"H" designates the preferred identification method (white wire with colored stripes) using Table IIIB;
"D" designates optional identification method A (solid colored wires) using Table IIIA;
"J" designates optional identification method A (solid colored wires) using Table IIIB;
"E" designates optional identification method B using Table IIIC;
"M" designates optional identification method C;
"N" designates optional identification method D (see mil spec for band marking specification).
Conductor Size (3): This position identifies the wire size. Wire size depends upon the basic wire specification (see 4).
Basic Wire Specification (4): The component wires are identified
by a one or two letter code. A listing of the basic wire specifications
can be found in Table I.
Number of Conductors (5): M27500 currently specifies from 1 to 15
conductors for shielded or shielded and jacketed cables, and from 2 to
15 for unshielded unjacketed or unshielded jacketed cables. Cables with
10 to 15 conductors are limited to 12 AWG and smaller.
Shield (6): The specific shield style and material are designated by a single letter code and are detailed inTable
I A.
Jacket (7): Cable jacketing materials are specified by a two digit code and are detailed in Table I B.
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