4 cross - sectional areas of connections and their corresponding testing current for temperature rise test is shown in table 4 ( the cross - sectional areas of connections externally wired by user should not be less than those in the table ) 温升试验用连接导线截面积与相应的试验电流见表4 (用户外接导线或铜排的截面积应不小于表中数据) 。