M27500 Cables

NEMA WC27500 Shielded and Unshielded Military Wire Cable

Military Grade Cable Conductor: Various Platings and Strandings
Insulation: Various Insulation Types
Shield: Various Materials (Shielded and Unshielded)
Jacket: Various Materials (Shielded and Unshielded)

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Applications

The NEMA WC27500 specification is commonly used to describe both shielded and unshielded cable constructions for avionics, aerospace and airframe applications. The specification allows the user a wide variety of construction choices. Circuit identification, conductor size, insulation type, number of conductors, shielding material and jacket compound may all be specified using this document.

Although there is not a QPL required for WC27500 in itself, the basic component wires are QPL. Thus, the producer of the finished cable must be a qualified source under the applicable basic wire specification, or must provide evidence that Qualified wire was used in the construction of the cable.

Since RSCC Aerospace and Defense ® has a large variety of military QPL approvals, it is able to provide one of the widest ranges of WC 27500 constructions of any source in the wire and cable industry. Although this brief sheet cannot list all the detailed testing and specification requirements contained in the complete WC 27500 document, we have summarized the major construction features of the specification and listed those that RSCC produces.

Cable Specifications

Table 1: Basic Wire Specifications

Symbol Basic Wire Specifications Insulation Type Temp Rating Voltage
A SAE AS50861/1 PVC/Nylon 150°C 600V
B SAE AS50861/2 PVC/Nylon/Braids 150°C
SB SAE AS22759/32 XLETFE 150°C
SC SAE AS22759/33 XLETFE 200°C
SD SAE AS22759/34 XLETFE 150°C
SE SAE AS22759/35 XLETFE 200°C
SM SAE AS22759/41 XLETFE 200°C
SN SAE AS22759/42 XLETFE 200°C
SP SAE AS22759/43 XLETFE 200°C
SR SAE AS22759/44 XLETFE 200°C
SS SAE AS22759/45 XLETFE 200°C
ST SAE AS22759/46 XLETFE 200°C
TE SAE AS22759/16 ETFE 150°C
TG SAE AS22759/18 ETFE 150°C
MH SAE AS81044/9 XL POLY/KYNAR 150°C
MJ SAE AS81044/10 XL POLY/KYNAR 150°C
MK SAE AS81044/11 XL POLY/KYNAR 150°C
ML SAE AS81044/12 XL POLY/KYNAR 150°C
MM SAE AS81044/13 XL POLY/KYNAR 150°C

The specification also allows a wide variety of jacket materials in both single and double wall constructions. The double jacket constructions are to be used in conjunction with the double shields listed above. A double jacket is applied using 2 shields with the inner jacket isolating the shields, plus an outer jacket.

Table 2: Jacket Types

Single Jacket Double Jacket Jacket Material Temp Rating
00 00 No Jacket -
01 51 Extruded White PVC 90°C
02 52 Extruded Clear Nylon 105°C
05 55 Extruded Clear FEP 200°C
08 58 Extruded White Irradiated PVDF 150°C
09 59 Extruded White FEP 200°C
10 60 Extruded Clear PVDF 125°C
14 64 Extruded White ETFE 150°C
15 65 Extruded Clear ETFE 150°C
20 70 Extruded White PFA 260°C
21 71 Extruded Clear PFA 260°C
23 73 Extruded White Irradiated ETFE 200°C

Table 3: Shield Descriptions

Single Shield Double Shield Shield Material Temp Rating
U - Not Shielded -
T V Tin Plated Copper, Round 150°C
S W Silver Plated Copper, Round 200°C
N Y Nickel Plated Copper, Round 260°C
F Z Stainless Steel, Round 400°C
C R Nickel Clad Copper, Round 400°C
M K Silver Plated High Strength, Copper Alloy, Round 200°C
P L Nickel Plated High Strength, Copper Alloy, Round 260°C
Symbol Basic Wire Specifications Shield
Material		 Jacket Material Temperature Rating Voltage Rating
Table 1 Table 1 Table 2 Table 3
A

B		 SAE AS50861/1

SAE AS50861/2		 U
T
V
 00
01
51 		105°C
90°C
90°C		 600V
MH
MJ
MK
ML
MM		 SAE AS81044/9
SAE AS81044/10
SAE AS81044/11
SAE AS81044/12
SAE AS81044/13		 U
T
V
 00
08
58 		150°C 600V
SB
SD		 SAE AS22759/32
SAE AS22759/34		 U
T
V		 00
23
73		 150°C 600V
SC
SE
SP
SR		 SAE AS22759/33
SAE AS22759/35
SAE AS22759/43
SAE AS22759/44		 U
S
W		 00
23
73		 200°C 600V
SM
SN
SS
ST		 SAE AS22759/41
SAE AS22759/42
SAE AS22759/45
SAE AS22759/46		 U
N
Y		 00
23
73		 200°C 600V

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