Why Did My Wire Burn When I Turned On the Switch?

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SUMMARY

The discussion centers on a wiring issue where a wire connected from a MAIN BUS BAR to a switch burned immediately upon activation, while another wire from the switch to a BUS BAR requiring power burned slowly. The user suspects that the wiring was reversed, with the hot wire mistakenly connected to the output side of the switch, causing overheating due to resistance. Immediate action is advised, including contacting a qualified electrician for safety reasons.

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TL;DR
MAIN BUS BAR wire to SWITCH burnt when switched ON and the other end of switch wire to the BUS BAR needing power slowly burnt.
Hello,

I am wondering why a wire that was connected from a MAIN BUS BAR to the top side of a switch and when turned ON burnt immediately and the wire connected from the bottom side of the switch to the BUS BAR needing power slowly burnt.

I'm thinking the wiring was reversed- Correct me but I think that the hot wire was connected to the side of the switch where power was supposed to go out and that causes the wire to heat up and it somehow bypassed the switch and was now feeding power on the other end of the switch and was slowly cooking the wire because there was resistance. Thank you!
 
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exp6 said:
Summary:: MAIN BUS BAR wire to SWITCH burnt when switched ON and the other end of switch wire to the BUS BAR needing power slowly burnt.

Hello,

I am wondering why a wire that was connected from a MAIN BUS BAR to the top side of a switch and when turned ON burnt immediately and the wire connected from the bottom side of the switch to the BUS BAR needing power slowly burnt.

I'm thinking the wiring was reversed- Correct me but I think that the hot wire was connected to the side of the switch where power was supposed to go out and that causes the wire to heat up and it somehow bypassed the switch and was now feeding power on the other end of the switch and was slowly cooking the wire because there was resistance. Thank you!
Yikes! Please call an electrician right away. There is no way we can help you figure this out remotely. Thread is closed.
 
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Most likely this can only be answered by an "old timer". I am making measurements on an uA709 op amp (metal can). I would like to calculate the frequency rolloff curves (I can measure them). I assume the compensation is via the miller effect. To do the calculations I would need to know the gain of the transistors and the effective resistance seen at the compensation terminals, not including the values I put there. Anyone know those values?

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