By pressiong the 2 buttons,check the side by side lines one by one.If the light is on,it is phase line,otherwise it is the null line,In case there is a break in the line,move until hte light is off.That is the break point.
英
美
- 按兩鍵)以鋪好的三芯或四芯電纜或電線(xiàn)，可將另一端全部良好接地，再如圖分別檢測燈亮則通，此法適合樓房裝修布線(xiàn)，將主線(xiàn)接地，邊安裝邊測試。
