1、 FORD LABORATORY TEST METHOD BB 105-01 Date Action Revisions 2001 03 02 Revised Editorial no technical change A. Cockman 1990 07 31 Printed copies are uncontrolled Page 1 of 2 Copyright 2001, Ford Global Technologies, Inc. DETERMINATION OF CROSS-SECTIONAL AREA OF STRANDED CONDUCTORS Application This
2、 method covers the procedure for determining the cross-sectional area of non-insulated stranded conductors by the weight method. Apparatus Required Balance Accurate to 0.1 % Steel Scale Whose least division is not greater than 0.5 mm Jig Or equivalent equipment, for cutting the conductor to length a
3、nd at right angles to its axis. Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise
4、specified. Test Specimens 1. Samples shall be taken from the outer end of reel or spool lengths, or from either end of coiled lengths. 2. The length of test specimen shall be 1.2 m minimum. FORD LABORATORY TEST METHOD BB 105-01 Page 2 of 2 Copyright 2001, Ford Global Technologies, Inc. Procedure 1.
5、Cut the test specimen, making sure that the ends are at 90 +/- 10 to the axis of the conductor. 2. Measure the length of the specimen to the nearest 0.5 mm and weigh to within +/- 0.1 % in grams. Note: Correction for temperature variation need not be made, since the error introduced in the length me
6、asurement by the temperature variation is less than the required accuracy of the length measurement. 3. Calculate the cross-sectional area of a stranded conductor, composed of only one type of conducting material, as follows: A = W x 100 8.89 x L 100 + K where: A = cross-sectional area, mm2 W = weig
7、ht of test specimen, g L = length of test specimen, m K = 2 (increment (increase) of weight and electrical resistance (from product specifications), percent) Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities.
