Use a clamp ammeter to find the short circuit point

If several lighting branches share one fuse, it is troublesome to find the short circuit fault by ordinary methods.

At this time, you can first connect a 500W white paper bulb to both ends of the blown fuse, turn on the power, and the incandescent lamp will light up. Then use a clamp ammeter to clamp the branch with a small current (5A). The branch with the largest current is the short circuit. Then clamp the front and back of each lamp in the branch to find the short circuit fault point. After eliminating the short circuit fault, the brightness of the 500W incandescent lamp will be significantly reduced, indicating that the fault has been eliminated.