Electrical Wiring in the Home/outlets and unmarked fuses

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Question
I have a small shed with 5 electrical outlets.They all worked yesterday until I plugged an extension cord in one of them, then the oulet sparked and now I now none of the oulets are working. I checked the fuse box ( have 3 fuses ) which are not marked. One is marked lights which are still working. My question is how can I find out which fuse goes to what outlets before I change the outlets out so I can then mark them properly. What is the safest way to change the outlets out.?

Answer
Hi.

More likely the wire burned than the outlet is bad.  So, check all of the wiring for burn spots, etc. If any outlets have wires pushed into the back, move the wire to the screws on the side. Check inside the wire nuts.

It would be best to remove all the fuses before working on the outlets.  Sometimes wires for more than one circuit are in a box. You really can't use a tester, because the outlets are not working.  And if the white wire is bad, you can still get shocked without the outlets working.
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Electrical Wiring in the Home

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Bob Sponaugle

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Just about any home wiring question. (not appliance repair) I have done all kinds of home wiring for myself, including adding a new breaker box, etc. Please, questions from North America only. Please be specific with details.

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