MIL-DTL-55425E
3.3.3 Finished cable. Two finished single pairs (one of each color) shall be twisted closely together, with a right
hand lay which shall not exceed six inches when averaged over a 10 foot length, to form a twisted two pair assembly.
Uniform tension shall be maintained on both pairs during the twisting operation to prevent looping or bunching of the
pairs and to assure that each pair supports half the tensile load.
3.3.4 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the
operational and maintenance requirements, and promotes economically advantageous life cycle costs.
3.4 Performance characteristics.
3.4.1 Tubing (heat shock). The insulated pair shall show no visible strains or cracking of the insulation when
tested as specified in 4.6.1.
3.4.2 Thermal stress cracking. The insulated pair shall show no visible strains or cracking of the insulation when
tested as specified in 4.6.2.
3.4.3 Cold bend. The insulated pair shall not crack either before or after aging when tested as specified in 4.6.3
and 4.6.3.1.
3.4.4 Elongation. Insulation elongation shall be not less than 400% when tested as specified in 4.6.4.
3.4.4.1 Elongation after aging. Insulation elongation after aging, when tested as specified in 4.6.4.1, shall have not
less than 80% of elongation as measured in 4.6.4.
3.4.5 Cutting. The average cutting load shall be not less than 70 pounds and the cutting load for any one
specimen shall be not less than 60 pounds (see 4.6.5).
3.4.6 Breaking load. The breaking load shall be not less than 77 pounds for each insulated pair (see 4.6.6).
3.5 Electrical requirements.
3.5.1 Dielectric strength, separated conductors. The individually insulated conductors shall withstand a potential of
1,000V rms for one minute when tested as specified in 4.7.1.
3.5.2 Attenuation. The attenuation of each pair shall be no greater than shown on figure 2 when measured both
wet and dry and as specified in 4.7.6.
3.5.3 DC resistance. The direct current (dc) resistance of each pair, at or corrected to 20 °C, shall not exceed
282.5Ω per loop-mile (see 4.7.2).
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