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FED-STD-228 Test Methods For Cables And Wire, InsulatedThis method is intended for use in determining the thickness of the insulation of insulated wire and cable. It is not recommended for use when the thickness of the insulation is less than 3/64 inch.

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FED-STD-228A
where:
W1=weight of the dry specimen, grams.
W2=weight of the specimen after immersion, grams.
W3=weight of conductor, insulation, and any tape, grams.
5.2 Unless otherwise specified in the detail specification, two specimens from each inspection unit shall
be tested.
5.3 The moisture absorption of the fibrous covering of the inspection unit shall be the average of the
results obtained from the specimens tested.
5.4 Moisture absorption of the fibrous covering of the inspection unit shall be recorded to the nearest 0.1
percent.
5.5 The temperature and time of immersion shall be recorded.
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