Mil Spec Wire and Cable

M55021 Specification Breakdown

 

M55021 PART NUMBER EXAMPLE:  B24C904-903-902P

Wire
Type

Conductor
Size

Conductor
Material

Color of
1st Wire

Color of
2nd Wire

Color of
3rd Wire

Covering over
Components
B 24 C 904 903 902 P
(Table 1) (Table 2) (Table 3) (Table 4) (Table 5)

TABLE 1: TYPE OF WIRE

Symbol Type

Wire Specification

 Symbol Type Wire Specification
B M16878/1 EE M16878/5 (NEMA HP3)
C M16878/2 BJ M16878/17
D M16878/3 CJ M16878/18
E M16878/4 (NEMA HP3) DJ M16878/19

TABLE 2: CONDUCTOR SIZE

Conductor Size

Stranding
30 - 26 AWG 7 Strands
24 - 12 AWG 19 Strands
10 AWG 37 Strands

TABLE 3: CONDUCTOR MATERIAL

Conductor Code

Conductor Type
C Copper
S Copper Clad Steel
H High Strength Copper Alloy

TABLE 4: COLOR CODE

  • For single shielded and single shielded and jacketed constructions, a dash should not be used. The color code designators for wires 2 and 3 of a twisted pair and triplet are separated by a dash. Two groups of numbers indicate a twisted pair, three groups indicate a twisted triple. Any order of color code designators is acceptable.

Code

Color

Code

 Color
0 Black 5 Green
1 Brown 6 Blue
2 Red 7 Violet
3 Orange 8 Gray
4 Yellow 9 White

TABLE 5: COVERING OVER COMPONENTS

Symol Type

Covering Over Finished Cable
U Unjacketed and unshielded 
P Polyvinyl Chloride (PVC) jacket 
F Fluorinated Ethylene Propylene (FEP) jacket
J Polyamide jacket 
T Polytetrafluoroethylene (PTFE) jacket 
S Shielded and unjacketed
SF Shielded and covered with FEP jacket 
SP Shielded and covered with PVC jacket 
SJ Shielded and covered with Polyamide jacket 
STW Shielded and covered with wrapped PTFE jacket 
SX Shielded and covered with extruded PTFE jacket