MIL-DTL-915/9F
Conductor size 12 (two required)
First
-
Copper conductor, AWG size 12, class K stranding, uncoated.
Second
-
Separator.
Third
-
Synthetic rubber insulation. Nominal wall thickness 0.031 inch.
Fourth
-
Marker braid. Standard identification code applied by method 4.
Fifth
-
Two conductors cabled with 3.5 to 4.24-inch lay. Fillers shall be used to
form a round assembly.
Assembly
First
- Two conductors, size 250, laid parallel with the pair of size 12 laid
between them. Fillers of synthetic elastomer or polychloroprene shall be
used to fill all spaces and to hold the pair well centered. At
manufacturer's option, fillers may be integral with the jacket.
Second - Nylon reinforcement over the assembly.
Third
- Polychloroprene jacket (black). Nominal wall thickness 0.156 inch.
Fourth - Cable surface marking in addition to standard marker tape.
NOTES: 1. Fillers and jacket shall be readily removable from the completed cable
without damage to the insulation on the conductors.
2. When the insulation on size 250 is applied as a "D" shaped section, the
centering and circularity requirements shall not apply.
TABLE I. Details.
Conductors
Overall diameter
oval shape
Diameter
Type and
maximum
Size
nominal
size
(inches)
Number
AWG
(inch)
JAS -250
2
12
0.097
1.260 minor and
2
250 MCM
0.713
2.480 major
EXAMINATION AND TESTS:
Requirements
Basic electrical:
Conductor resistance - ohms/l000 feet at 25°C, maximum
Size 12....................................................................................1.65
Size 250 MCM..................................................................... 0.046
Voltage withstand volts, root mean square, minimum................. 2000
Insulation resistance megohms-1000 feet, minimum
Conductor to conductor and conductor to water
Conductor size 12.................................................... 200
Conductor size 250 MCM....................................... 100
2
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