This Part of GB/T 4909 specifies the measuring tool, sample preparation, measurement procedure, test results and evaluation of measuring test of dimension of bare wires.
This Part is applicable to measuring the boundary dimensions, radius of rounded angle lay ratio and sectional area of various round, rectangular, heteroideus conductor and stranded conductor.
When there are higher requirements for the measurement accuracy of overall dimension, the corresponding product standard prevails.
This Part shall be used together with GB/T 4909.1-2009.
2 Normative References
The provisions of the following documents form the provisions of this Part through the reference of this Part of GB/T 4909. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties whose enter into agreement according to this standard are encouraged to research whether the latest editions of these documents are applicable. For undated references, the latest edition of the reference document is applicable to this part.
GB/T 1216-2004 External Micrometer (DIN 683-1999, MOD)
GB/T 3048. 2-2007 Test Methods for Electrical Properties of Electric Cables and Wires - Part 2：Test of Electrical Resistivity of Metallic Materials (IEC 60498：1974，MOD)
GB/T 4909.1-2009 Test Methods for Bare Wires - Part 1: General
GB/T 8061-2004 Micrometer with Dial Comparator
GB/T 21389-2008 Vernier Dial and Digital Display Calipers
JB/T 8788-1998 Feeler Gauge
