FED-STD-228A
Method 8021.1
18 APRIL 2014
CARRIERS, ENDS PER CARRIER, AND PLY OF YARNS; BRAID
1. SCOPE
1.1 This method is intended for use in determining the number of carriers, ends per carrier, and ply of
yarn in the braid of insulated wire and cable. For the purpose of this method, ends, ply, ply yarn, and
carrier are defined as follows: An "end" is an individual yarn. A "ply" is an individual single yarn in a ply
yarn. A "ply yarn" is the product formed by twisting together two or more single yarns. A "carrier" is the
yarn or combination of several yarns laid parallel in the braid by a single bobbin of the braiding machine.
2. SPECIMEN
2.1 The specimen should be a piece of the inspection unit at least 4 inches in length with the braid intact
from which any covering over the braid has been removed.
3. APPARATUS AND REAGENTS
3.1 The apparatus and reagents shall be as follows:
3.1.1 A needle or other pointed instrument.
3.1.2 Wiping cloth.
3.1.3 Alcohol or other suitable solvent.
4. PROCEDURE
4.1 Any saturants or finishing materials shall be removed from the specimen by means of the cloth and
solvent.
4.2 Number of carriers. The cleaned braid shall be separated for a distance of at least 1 inch of the
length of the specimen. The number of carriers in the whole braid shall then be counted and the value
recorded.
4.3 Ends per carrier. Several of the carriers shall be separated, the number of ends (yarns) per carrier
counted, and the value recorded.
4.4 Ply of yarn. Several of the yarns shall be untwisted, the number of plies counted, and the value
recorded.
5. RESULTS
5.1 Unless otherwise specified in the detail specification, one specimen from each inspection unit shall
be tested.
5.2 The number of carriers in the braid, the number of ends per carrier, and the number of plies in the
yarn of the inspection unit shall be the results obtained from the specimen tested.
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