There’s a problem with fuses. On the face of it, testing would seem to be a one-shot deal — exceed the rated current and see if it blows. But once you know the answer, the device is useless. If only ...
An Instagram video has gone viral after demonstrating a quick hack electricians use to test a fuse using just a smartphone. The clip, posted by @creationsparkdiy, has now reached 5.2 million views.
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