6 ways to determine the breakpoint of power cable

When the cable or the cable's internal breakpoint fault, due to the external insulation skin package, it is difficult to intuitively determine the breakpoint to determine the location. Digital multimeter method: first of all, one end of the cable with a breakpoint connected to the 220V line, the other end of the suspension. Mobilize the multimeter gear to AC 2V voltage block. Then start from the faulty cable firewire access end, a hand holding the black pen, red pen along the faulty cable insulation slowly sliding. Cable without a breakpoint at the voltage value of about 0.445V or so. When the red pen moved to a certain place, the multimeter shows the voltage value plummeted to 1/10 of the normal voltage that is 0.04V. At this point, you can basically determine the breakpoint in the position forward (firewire access terminal) 15cm. Induction pen method: first exclude the breakpoint cable around the cable has power, and then the breakpoint cable connected to the firewire, and then use the inductive pen perpendicular to the cable slowly moving, when the inductive pen when the AC signal disappears, you can judge the breakpoint in the detection point, the error is not more than 10cm at most.

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