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MIL-C-27500 Cables & NEMA WC 27500 Cables

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MIL-C-27500 Wire (M27500 Cable)
MIL Spec Wire
NEMA WC 27500

The M27500 Cable specification is commonly used to describe both shielded and unshielded cable constructions for avionics, aerospace and airframe applications. Circuit identification, conductor size, insulation type, number of conductors, shielding material and jacket compound may all be specified using this document. Single conductor, twisted pairs, and multiconductor cables through 10 components are all included.

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Table 1: Basic M27500 Cable Description

Code	SAE Component	Code	SAE Component	Code	SAE Component
A	AS50861/1	MD	AS81044/5	SM	AS22759/41
AA	AS50861/5	ME	AS81044/6	SN	AS22759/42
AB	AS50861/6	MF	AS81044/7	SP	AS22759/43
AD	AS50861/7	MG	AS81044/8	SR	AS22759/44
B	AS50861/2	MH	AS81044/9	SS	AS22759/45
C	AS50861/3	MJ	AS81044/10	ST	AS22759/46
CA	AS22759/13	MK	AS81044/11	SV	AS22759/47
CB	AS22759/14	MW	AS81381/11	SW	AS22759/48
CC	AS22759/15	ML	AS81044/12	SX	AS22759/49
DB	AS22759/180	MM	AS81044/13	SY	AS22759/50
DC	AS22759/181	MR	M81381/7	TA	AS22759/8
DE	AS22759/182	MS	M81381/8	TE	AS22759/16
DF	M22759/183	MT	M81381/9	TF	AS22759/17
DG	AS22759/184	MV	M81381/10	TG	AS22759/18
DH	AS22759/185	MW	M81381/11	TH	AS22759/19
DJ	AS22759/186	MY	M81381/12	TK	AS22759/20
DK	AS22759/187	NA	M81381/13	TL	AS22759/21
DL	AS22759/188	NB	M81381/14	TM	AS22759/22
DM	AS22759/189	NE	M81381/17	TN	AS22759/23
DN	AS22759/190	NF	M81381/18	VA	AS22759/5
DP	AS22759/191	NG	M81381/19	WA	AS22759/6
DR	AS22759/192	NH	M81381/20	WB	AS22759/80
E	AS22759/2	NK	M81381/21	WC	AS22759/81
EA	AS822759/1	NL	M81381/22	WE	AS22759/82
F	M8777 (MS27110)	P	AS50861/4	WF	AS22759/83
H	M8777 (MS25471)	RA	AS22759/3	WG	AS22759/84
JA	M25038/1	RB	AS22759/4	WH	AS22759/85
JB	AS22759/28	RC	AS22759/11	WJ	AS22759/86
JC	AS22759/29	RE	AS22759/12	WK	AS22759/87
JD	AS22759/30	SA	AS22759/7	WL	AS22759/88
JE	AS22759/31	SB	AS22759/32	WM	AS22759/89
JF	M25038/3/TD>	SC	AS22759/33	WN	AS22759/90
LE	AS22759/9	SD	AS22759/34	WP	AS22759/91
LH	AS22759/10	SE	AS22759/35	WR	AS22759/92

Table 2: M27500 Cable's Shield Description

Single Shield Code	Double Shield Code	Shield Material Description	Max. Temperature for Shield
U	N/A	Not Shielded	N/A
T	V	Tinned Copper, Round	150°C
S	W	Silver-Coated Copper, Round	200°C
N	Y	Nickel-Coated Copper, Round	260°C
F	Z	Stainless Steel, Round	400°C
C	R	Nickel-Clad Copper, Round	400°C
M	K	Silver-Coated High Strength Copper Alloy, Round	200°C
$	+	Heavy Silver-Coated Copper, Round	200°C
P	L	Nickel-Coated High Strength Copper Alloy, Flat	260°C
G	A	Silver-Coated Copper, Flat	200°C
H	B	Silver-Coated High Strength Copper Alloy, Flat	260°C
*	#	Nickel-Coated Copper, Flat	260°C
J	D	Tinned Copper, Flat	150°C
E	X	Nickel-Coated High Strength Copper Alloy, Flat	260°C
I	Q	Nickel-Chromium Alloy, Flat	400°C

Table 3: M27500 Cable Jacket Type

Single Jacket Code	Double Jacket Code	Jacket Material Description	Max. Temperature for Jacket
00	00	No Jacket	N/A
01	51	Extruded PVC, White	90°C
02	52	Extruded Nylon, Clear	105°C
03	53	White Nylon Braid over Mylar	105°C
04	54	Polyester Braid over Mylar	150°C
05	55	Extruded FEP, Clear	200°C
06	56	Extruded or Taped PTFE, White	260°C
07	57	PTFE Coated Glass Braid over PTFE	260°C
08	58	Extruded XL-PVDF, White	150°C
09	59	Extruded FEP, White	150°C
10	60	Extruded PVDF, Clear	125°C
11	61	Polyimide Tape, FEP	200°C
12	62	Polyimide Tape, FEP, Polyimide	200°C
14	64	Extruded ETFE, White	150°C
15	65	Extruded ETFE, Clear	150°C
16	66	Nylon Braid, PTFE Tape	200°C
17	67	Extruded ECTFE, White	150°C
18	68	Extruded ECTFE, Clear	150°C
20	70	Extruded PFA, White	260°C
21	71	Extruded PFA, Clear	260°C
22	72	Polyimide Tape, FEP Wrap, Polyimide	200°C
23	73	Extruded XL-ETFE, White	200°C
24	74	PTFE Tape over TFE/Polyimide	200°C
25	75	Smooth PTFE Tape over TFE/Polyimide	260°C
26	76	Extruded Low Fluoride XL-ETFE, White	200°C

Table 4: M27500 Cable's Shield Covering and Color Coding

85% Shield Coverage Code	90% Shield Coverage Code	M27500 Cable Terminology	Componenet Wire ID Method
-	C	Preferred Method, Table 4A	White wire with colored stripes per Table 4A. Wire 1 has no stripe. Wires 11-15 have double stripes.
F	H	Preferred Method, Table 4B	White wire with colored stripes per Table 4B. Wire 5 has no stripe. For wires 11-15, insulation is first color, stripe is second color.
A	D	Optional Method A, Table 4A	Solid Colored Wire. Wires 11-15 have a stripe in a lighter shade of base color.
G	J	Optional Method A, Table 4B	Solid Colored Wire. Wires 11-15, insulation is first color, stripe is second color.
B	E	Optional Method B, Table 4C	Wire insulation color is based on AWG size. Bands of contrasting color denote wire number (per table 4D)
K	M	Optional Method C, Table 4C	Wires are all same color based on AWG size. Numbers of contrasting color printed to denote wire number
L	N	Optional Method D	White wires with numbers of contrasting color printed to denote wire number

Table 4A: M27500 Cable's Color Code Chart

Wire Number	Color	Wire Number	Color	Wire Number	Color
1	White	6	Black	11	Blue/Blue
2	Blue	7	Yellow	12	Orange/Orange
3	Orange	8	Violet	13	Green/Green
4	Green	9	Gray	14	Red/Red
5	Red	10	Brown	15	Black/Black

Table 4B: M27500 Cable's Color Code Chart

Wire Number	Color	Wire Number	Color	Wire Number	Color
1	Red	6	Black	11	Red/White
2	Blue	7	Brown	12	Blue/White
3	Yellow	8	Orange	13	Yellow/White
4	Green	9	Violet	14	Green/White
5	White	10	Gray	15	Black/White

Table 4C: M27500 Cable's Color Code By AWG Size

AWG Size	Color	AWG Size	Color	AWG Size	Color	AWG Size	Color
26	Black	24	Blue	22	Green	20	Red
18	White	16	Blue	14	Green	12	Yellow
10	Brown	8	Red	6	Blue	4	Yellow
2	Red	1	White	1/0	Blue	2/0	Green

Table 4D: M27500 Cable's Color Code Band Configuration

Wire Number	Band Configuration	Wire Number	Band Configuration	Wire Number	Band Configuration
1	None	6	6 Narrow	11	1 Wide, 4 Narrow
2	2 Narrow	7	7 Narrow	12	1 Wide, 5 Narrow
3	3 Narrow	8	1 Wide, 1 Narrow	13	2 Wide, 1 Narrow
4	4 Narrow	9	1 Wide, 2 Narrow	14	2 Wide, 2 Narrow
5	5 Narrow	10	1 Wide, 3 Narrow	15	2 Wide, 3 Narrow