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Nov 18, 2018 at 16:02 history edited Daniel Griscom CC BY-SA 4.0
Adding a couple of references
Nov 1, 2018 at 22:22 comment added Ed Beal Being a professional electrician I rarely find damaged conductors unless back stabs were used and the breaker oversized to 20 amp. 14 awg wire can be protected at 100 amps inside a motor control enclosure the fact that it blew immediately I would check in the box if no damage there the wiring is usually ok since the light is on any splices are working.. Note an inverse time breaker even a 20 amp will trip between 60& 100 amps in approx .01 seconds based on the trip curves so there is not enough time to overheat the insulation.+
Nov 1, 2018 at 21:22 history edited Daniel Griscom CC BY-SA 4.0
Removing somewhat-confusing picture of snap-action toggle switch
Dec 31, 2016 at 18:29 comment added Ismael Miguel @DanielGriscom Better safe than sorry. I'm not saying it is a major concern, but, if it was me, I wouldn't rest until I knew for sure that the wires are fine. Just imagine that the insulation melted somewhere, and those wires touch in 2-3 months. (I know this may be unlikely, but imagine). It could have been prevented by checking the wiring.
Dec 31, 2016 at 14:42 comment added Daniel Griscom @IsmaelMiguel That said, imagine if there hadn't been a switch; the wiring should be able to withstand a short until the fuse blew. Adding the switch could only lessen the damage to the rest of the circuit. So, I don't see damage to the rest of the circuit as being of great concern.
Dec 31, 2016 at 2:44 comment added Daniel Griscom @IsmaelMiguel Good suggestion; I've added that to the answer.
Dec 31, 2016 at 2:44 history edited Daniel Griscom CC BY-SA 3.0
Added suggestion to have electrician look over circuit
Dec 30, 2016 at 22:30 comment added user What @IsmaelMiguel said. If the switch is broken, there's a good chance that something else is broken as well. I very strongly recommend OP to contact an electrician and have them go over that circuit before reapplying power.
Dec 30, 2016 at 22:24 comment added Ismael Miguel This is exactly what I had in mind. The "enormous surge" probably damaged something else. It's a good idea to check if the cabling is all intact as well.
Dec 30, 2016 at 22:08 comment added Dan Z That is dangerously awesome.
Dec 30, 2016 at 20:54 history edited Daniel Griscom CC BY-SA 3.0
Added info on spring in switch
Dec 30, 2016 at 19:52 history edited Daniel Griscom CC BY-SA 3.0
deleted 2 characters in body
Dec 30, 2016 at 19:16 history answered Daniel Griscom CC BY-SA 3.0