FED-STD-228A
Method 5141.1
18 APRIL 2014
DRIP, CABLE
1. SCOPE
1.1 This method is intended for use in determining the ability of saturants and finishing materials in cable
to resist flow at elevated temperatures when the cable is in a vertical position.
2. SPECIMEN
2.1 The specimen should be a piece of the inspection unit not less than 30 times the over-all diameter of
the cable.
3. APPARATUS
3.1 The apparatus shall be as follows:
3.1.1 A circulating air oven of sufficient size to accommodate the specimen in a vertical position and
capable of maintaining the specimen at the required temperature within ± 1°C (2°F).
3.1.2 Means for supporting the specimen in a vertical position.
3.1.3 A sheet of paper or a container for collecting any drippings from the specimen.
4. PROCEDURE
4.1 Unless otherwise specified in the detail specification, the specimen shall be subjected to a
temperature of 80° ± 1°C (176° ± 2°F) for a period of 1 hour.
4.2 All covering and insulation shall be removed from one end of the conductor of the specimen for a
distance of approximately ¾ inch. The specimen shall be supported vertically by the bare end of the
conductor in the oven which has been preheated to the required temperature. A sheet of white paper or
any suitable container shall be placed beneath the specimen in such a position that it will catch any
material which drips from the specimen. The specimen shall be heated for the required time and at the
required temperature. At the end of the exposure period, the lower end of the specimen shall be
examined for globules of the saturants or finishing materials and bubbles on the surface. The paper or
container shall be examined for any drippings.
5. RESULTS
5.1 Unless otherwise specified in the detail specification, specimens from each inspection unit shall be
tested.
5.2 The resistance to dripping of the fibrous covering of the inspection unit shall be the results obtained
from the specimens tested.
5.3 Any exudation, formation of bubbles on the inspection unit, or drippings on the paper shall be
recorded.
5.4 The time and temperature of exposure shall be recorded.
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