对金属导体导电率（EC）测试过程中的不确定度来源进行了分析，并对H96黄铜棒的导电率测试结果的不确定度进行了评定。结果表明：金属导体导电率测试过程中的不确定度来源主要包括环境温度测量、试样标距长度、直径测量、电阻测量以及数值修约等；H96黄铜棒导电率测试结果的不确定度报告为EC=54%IACS，U=2%IACS，k=2。

The uncertainty sources of electrical conductivity (EC) of the metal conductor in measurement course were analyzed, and the uncertainty on measurement results of electrical conductivity of H96 brass bar was evaluated. The results show that the uncertainty sources of electrical conductivity of the metal conductor in measurement course mainly included ambient temperature measurement, sample gauge length, diameter measurement, resistance measurement, data rounding and so on; the uncertainty report of electrical conductivity of H96 brass bar measurement results was EC=54%IACS, U=2%IACS, k=2.