An Integrated Publishing, Inc. Site

An Integrated Publishing Website

MIL-DTL-27072 Cable, Power, Electrical And Cable, Special Purpose, Electrical, Multiconductor And Single Shielded, General Specification ForThis specification covers special purpose electrical multi-conductor and single shielded cable for electronic circuits where the cable will be protected in racks, tunnels, or within buildings, trailers, or equipment. Cables constructed using polyvinyl chloride \(PVC\) on insulated wires or for fillers, tapes, or jackets are not to be used for aerospace applications.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12

MIL-DTL-27072E

3.5.3.3 Dimensions. Dimensions of component jackets shall be specified in table VIII. The average

jacket thickness shall be not less than that shown in table VIII. The minimum wall thickness at any cross

section shall be not less than 70% of the average wall thickness at that cross section.

TABLE VIII. Minimum average jacket wall thickness.

Diameter of component

Jacket material

under jacket inch (mm)

inch (mm)

.000 (.00) through 2.54

.000 (.00) through .100

.005 (.13)

.012 (.30)

(64.52)

(2.54)

2.57 (65.28) through 3.17

.101 (2.57) through .125

.007 (.18)

.015 (.38)

(80.52)

(3.18)

3.20 (81.28) through 5.08

.126 (3.20) through .200

.007 (.18)

.015 (.38)

(129.03)

(5.08)

5.11 (129.79) through

.201 (5.11) through .250

.008 (.20)

.015 (.38)

6.35 (161.29)

(6.35)

6.38 (162.05) through

.251 (6.38) through .500

.020 (.51)

12.7 (322.58)

(12.70)

12.7 (322.58) through

.501 (12.73) through .750

.030 (.76)

19.0 (482.60)

(19.05)

19.1 (485.14) through

.751 (19.08) through

.040 (1.02)

25.4 (645.16)

1.000 (25.40)

1/ Dimensions are in inches.

Metric equivalents are given for information only.

3.5.4 Final cabling. The cabling of wires, components, or combinations thereof, and fillers, if

applicable, shall be accomplished such that there is no residual twist left in the individual wires or

components. The length of lay shall be between 8 and 16 times the pitch diameter of the particular layer.

3.5.4.1 Binder tapes. Binder tapes may be used in the final cabling process. When binder tapes are

used, the tapes shall be specified in 3.3.4 and shall be applied with a minimum overlap of 25%.

3.5.4.2 Temperature equivalent. When an FEP sheath (see 1.2.1.1 and table V) is specified for use

with basic wire designated D or E (see table II), the binder tape and filler material, if used in the

construction, shall have a temperature rating equivalent to that of the basic wire.

3.5.4.3 Overall shielding. When specified (see applicable specification sheet), an overall shield shall

be applied over the complete cable core prior to application of the cable sheath. Shielding construction

shall be specified in 3.5.2 and 3.5.2.1.

3.5.5 Sheaths. Sheaths shall be centered over the cable core. Sheaths of materials designated A,

B, and D (see table V) shall be extruded directly over the cabled components or overall shield or binder

tape, if present. Sheath materials designated E (see table V) shall be either extruded or tape wrapped

directly over the cable components or overall shield or binder tape, if present.

3.5.5.1 Sheath wall thickness. The average sheath wall thickness shall be not less than the values

specified in table IX. The minimum wall thickness at any cross section shall be not less than 70 percent

of the average wall thickness at that cross section.